AN ANALYSIS OF FACTORS INVOLVED IN TEACHING PILOTS TO LAND A DISSERTATION SUBMITTED TO THE FACULTY OF THE GRADUATE SCHOOL OF THE UNIVERSITY OF MINNESOTA BY EMANUEL JASCHA BLOCK IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DR. JAMES M. BROWN, ADVISOR APRIL, 2007 i Copyright Emanuel Jascha Block 2007 ii Acknowledgements Many people helped me complete this study. I would like to thank my advisor Dr. James M. Brown who guided me through the graduate school process. His becoming a commercial, instrument rated, and soon to be instructor pilot has been of significant help to me in melding education theory and practice with the sometimes arcane tasks of flying an airplane. I would also like to thank Brian Addis, Steve Anderson, Waldo Anderson, Anders Christenson, Marlan Perhus, Cliff Tamplin, and Tom Woods who helped evaluate my model of the landing process, its associated list of what flight instructors should teach, and the interview process. The staffs of the local FAA Flight Standards District Office and Department of Aeronautics of the Minnesota Department of Transportation provided me with helpful resources. I would like to thank the University of Minnesota and the College of Education and Human Development for providing a supportive, student centered, environment that was instrumental in motivating a senior citizen to achieve a lifetime goal. The Civil Air Patrol has been a passion of mine for many years. My participation in cadet flight academies for 35 years helped me learn much about the process of teaching pilots to land. The idea for this study evolved from that experience. I am grateful for having had the opportunity to serve. iii Further thanks to Jim Harris, Charles Robertson, and the staff of the John D. Odegard School of Aerospace Sciences at the University of North Dakota who welcomed me to their campus and helped me formulate the study approach. Finally, I am indebted to all the study participants who took the time to tell me about their teaching. Without their help, this study would have been impossible. iv Abstract This study involved two research questions: 1. What do experts in the field suggest should be taught to pilots who are learning how to land? 2. What is actually being taught to pilots who are learning how to land? The population for this study was all flight instructors in Minnesota who were authorized to teach in single engine land airplanes. Research question one was answered by developing a conceptual model of the landing process and by developing a list of items that flight instructors should teach in order to cover all aspects of the model. The model and list were discussed with a number of experts in the field of flight instruction. The experts agreed with the model and lists‟ applicability. Research question two was answered by interviewing 32 flight instructors chosen at random from a list of certificated flight instructors with current Minnesota addresses. A pilot-study was performed to validate the data gathering method. Descriptive statistical analysis of the interview data showed that flight instructors taught an average of 27 of the 37 items that should be taught according to the list developed in response to research question one. Analysis of the data showed that neither total flying time nor total instructing time had statistically significant relationships with what flight instructors v taught to pilots learning to land. In addition, the most experienced instructors were found to be more aware of basic teaching considerations than were the least experienced instructors. Finally, more experienced instructors were more likely than less experienced instructors to teach pilots to land with full flaps. Anecdotal data were obtained regarding details of teaching the 37 items defined by the answers to research question one. Two general styles of teaching were evident. One style depended more on trial and error than did the other. The other style depended more on providing pilots with detailed visual cues. vi Dedication This dissertation is dedicated to my late brother David Block. By his unwillingness to allow physical handicaps to stop him from enjoying life to the fullest, he was an inspiration to all who knew him. vii TABLE OF CONTENTS Chapter One – Problem Background Problem Landing Accidents Landing Incidents Inadequate Flight Instruction Problem Statement Study Focus Research Questions 1 1 2 3 4 5 7 7 8 Chapter Two – Literature Review Areas of Interest Population of Interest The Facts and Skills That Must be Transmitted to New Pilots Recommendations for Teaching Pilots How to Land an Airplane The Seriousness of the Landing Accident Problem The Contribution of Inadequate Flight Instruction to the Problem Data Regarding How Flight Instructors Actually Teach Pilots How to Land a Light Airplane Model of the Landing Process Stabilized Approach. Definition Approach Parameters Power-on Approaches Expert opinions Stabilized Approach Factors Flaps Adequate flying skills Trim Altitude control and airspeed control Non-stabilized Approaches Centerline alignment Centerline Alignment Factors The windsock Recognition of drift The crab The sideslip Establishing Flare Point 11 11 12 13 15 15 15 16 viii 16 19 19 20 23 24 25 25 27 28 29 31 32 32 32 32 33 34 38 Establishing Flare Point Factors Visual cues Point/power Diving at the runway Stationary spot technique Windows Visual approach slope indicators Forward slip Level-off Level-off Factors Visual cues Seat height Low pass Power Removal Touchdown Touchdown Factors Nose attitude Gusts/turbulence Crosswind correction Recoveries from skip, bounce, or balloon Roll-out Roll-out Factors Alignment and drift correction Braking Touch and go or full Stop Other Factors Looking for traffic Go-around Psychological factors Physiological factors Chapter Three – Research Methods Engaged Scholarship Insider‟s Perspective Methods Answering the Research Questions Question One Content applicability Number of experts Weighting the shoulds Question Two Data Gathering Method Interviewing Participants Pilot Study ix 39 39 40 40 41 42 43 45 46 46 46 49 49 50 51 51 51 53 53 54 55 56 56 56 57 58 58 59 60 60 62 62 63 63 63 64 64 64 65 65 65 68 68 Population Participant solicitation Interviews 69 70 70 Chapter Four – Data Analysis Response to Mailings Participants‟ data distributions Total Flight Time Total Instructing Time Number of Shoulds Taught Operational Significance Correlation of Experience and the Number of Shoulds Taught Relationship Between the Number of Shoulds Taught and Instructing Experience Relationship Between the Number of Shoulds Taught and Total Flight Time Frequencies of the Shoulds taught Comparison of Shoulds Taught With Instructing Experience Other Observations Should 1 Should 2 Should 3 Should 6 Should 7 Should 8 Should 13 Should 14 Should 15 Should 16 Should 17 Should 18 Shoulds 20,21,28,29 Should 22 Should 26 Should 27 Should 33 Should 34 Should 37 71 71 72 72 73 73 74 74 75 Chapter Five – Summary, Implications, and Recommendations Summary of the Results of the Study Implications Two Approaches to Flight Instructing Trial and Error 92 92 92 92 93 x 77 80 81 83 83 84 84 84 85 85 85 86 86 87 87 88 88 89 89 89 90 90 90 Detailed Cues Level-off` Stationary spot Touchdown nose attitude Benefits of the Study Flight Schools, Flight Instructors, and Student Pilots Standardization of Instruction Flight Instructor Continuing Education Limitations Population Method Activity Recommendations Publication Research Continuing Education Evaluation Data Collection Population Other Piloting Tasks Visual Cues Journal References Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I 94 94 94 94 95 95 95 97 98 98 98 99 99 99 100 100 101 101 102 102 103 104 105 List of Shoulds Weighting Letter Sent to Experts Experts‟ Weighting of the 37 Shoulds Interview Questions Pilot Study Interviews Analysis First Letter to Sample Return Postcard Second Letter to Sample Spread Sheet xi 112 115 116 118 121 126 127 128 129 List of Tables Table 1 Regression statistics for number of shoulds taught and instructing experience. 70 Table 2 Regression statistics for number of shoulds taught and total flight time. 79 Table 3. Should frequencies 80 Table 4. Comparison of shoulds taught 82 xii List of Figures Figure 1 Landing portion of an airport traffic pattern 14 Figure 2 Model of the Landing Process 18 Figure 3 Distribution of participants‟ total flying times 72 Figure 4 Distribution of participants‟ flight instructing times 73 Figure 5 Distribution of the number of shoulds taught by participants 74 Figure 6 Correlation between the number of shoulds taught and instructing experience 76 Figure 7 Correlation between the number of shoulds taught and total flight time 79 xiii xiv CHAPTER ONE: THE PROBLEM Background Perhaps the first recorded aircraft accident was the crash of Icarus into the sea when the wax holding his wings together melted as a result of flying too close to the sun. Icarus‟ flight instructor was his father Daedalus, a prolific inventor who built the wings to escape imprisonment on Crete. Little is known of the details of the accident since no accident investigation records have survived. We are led to wonder how Daedalus taught Icarus to fly. How did he teach the flight characteristics of the wings? Did he demonstrate the wings propensity for thermal failure? How did he teach Icarus to judge his altitude to avoid flying too close to the sun? Did he instruct Icarus in good aeronautical decision making? Did he teach Icarus to recognize the onset of thermal failure and how to take corrective action? We can only speculate about the factors involved in that accident. However, we can learn something of how modern flight instruction is done through a study of the instructional process. This study focused on the training provided to pilots who learn to fly in light, single engine, propeller driven airplanes. Almost all pilots, except military pilots, learn this way whether or not they become professional pilots. Such pilots include pilots who fly for recreation, for business reasons, or for travel. Some pilots trained in light aircraft become charter, corporate, or airline pilots after further experience and training. Other light aircraft pilots may also move to more powerful and complex airplanes, for personal or business reasons, after suitable additional training. This study did not include military 1 flight training since military requirements and equipment may differ from those associated with light airplanes. Flight training is available to the public from a variety of sources. A flight instructor who owns or rents an airplane may operate as a one person flight school. Organizations that offer fuel, maintenance and other services may also offer flight instruction. Such organizations are located at airports and are called Fixed Base Operators (FBOs). Other organizations may offer flight training only. Many colleges and universities offer flight training, often as part of a two or four year degree. Flying clubs (shared ownership) may allow flight training, given by a member or by an outside instructor. Common to all these enterprises are the Federal Aviation Administration (FAA) regulations. Also, flight instruction must be given by flight instructors certificated by the FAA. During their initial light airplane training, pilots form the basic habit patterns that guide them through the rest of their flying careers, whether or not they become professional pilots. This study concerned the part of initial training associated with first learning to land. Problem Accidents continue to plague general aviation; that is, aviation other than the scheduled airlines, the military, or other government agencies. Landing accidents constitute a substantial portion of the total. Inadequate flight instruction has been implicated as a factor. This study dealt with what pilots needed to be taught in order to learn to land an airplane, as suggested by experts. The study also examined what flight 2 instructors in Minnesota were teaching. The study was directed more toward what was taught, rather than how it was taught; although the two were sometimes inseparable. Modern light airplanes are well designed and are usually well maintained in accordance with FAA requirements. This leaves pilot error as the major source of airplane accidents. The Aircraft Owners and Pilots Association (AOPA) 2006 Nall Report, a publication of the Air Safety Foundation (ASF), a division of the AOPA, showed that in 2005 74.9% (1076) of 1436 fixed wing general aviation accidents were caused by the pilot and included 242 fatalities. A significant factor was inadequate pilot proficiency. This could be due to inadequate initial training or to lack of recent experience and practice. The FAA (1995, tape three) stated that “Most accidents, including most landing phase accidents, are a result of a failure in the human element” (46 minutes, 55 seconds). Landing Accidents The FAA (2005) stated that “According to AOPA Air Safety Foundation‟s 2004 Nall Report, „the top trouble spots remain: too many takeoff and landing accidents due to poor skill...‟” The 2006 Nall report showed that, in 2005, 41.4% (436) of pilot related accidents occurred during landing and caused eight fatalities The Nall Report findings were based on National Transportation Safety Board (NTSB) records. Another report (AOPA Air Safety Foundation, 2002) showed that the total number of landing accidents for all United States airplanes (general aviation and all others) remained steady at about 500 accidents per year between 1994 and 2000, including about 50 fatal landing accidents a year. 3 Landing Incidents Although the accident data above are based on NTSB findings, landing accidents may be far fewer than landing incidents. The NTSB only reports accidents as defined according to part 830 of the Federal Air Regulations (FARs) (2002). A reportable accident is one in which substantial damage occurs. Part 830.2 of the FARs excludes damage to propeller blades, landing gear, tires, flaps, and wingtips from the definition of substantial damage. A mishap where such damage occurs is typically called an incident and does not require notification to the NTSB. Thus, it can be argued that most landing problems are not reported. Benkert (n.d.) stated that “Many incidents are not reported and many accidents are downgraded by the FAA and others to incidents. This is an attempt to make everyone look good. The true rate is alarming” (p. 2). The suggestion that landing incidents far outnumber landing accidents was supported by data from AVEMCO, an insurance affiliate of the AOPA that stated that only 17.3 % of claims and 40.3% of dollars paid were for accidents (of all kinds) reported to the NTSB. Claims paid for landing incidents and accidents averaged $47,514 per event and constituted 28 % of the total claims (in Collins, R., 2007). The researcher obtained anecdotal evidence of the ratio of landing incidents to landing accidents through questionnaires distributed at a meeting of the Minnesota Association of Professional Flight Instructors (MAPFI) and at an FAA/Minnesota Department of Transportation (MNDOT) safety seminar. The questionnaires asked about involvement in landing accidents or incidents. Of 18 attendees at the MAPFI meeting, 14 responses included no accidents and nine incidents. Of 125 attendees at the safety 4 seminar, 53 responses reported two accidents and 12 incidents. This is an indication that landing incidents greatly outnumber landing accidents. Inadequate Flight Instruction An AOPA Air Safety Foundation (2004) study showed that from 1992 to 2001 33.2 % of all instructional accidents occurred during landing, indicating that having an instructor on board did not guarantee safety. The same study showed that when students flew alone (solo), landing accidents accounted for 50.6 % of the total, possibly indicating the need for better instruction in learning to land. The AOPA 2003 Nall Report stated that “...from 1991-2000...pilot failure to maintain control of the aircraft was the leading factor for both takeoff accidents and landing accidents” (p. 2). Failure to maintain control accounted for 32.8 % of landing accidents. Also, that Nall Report stated that “...almost without exception, loss of control of the aircraft on takeoff or landing is an issue of either inadequate training or lack of pilot proficiency”. Collins, R. (2006) stated “And training is an overriding concern when considering the state of general aviation safety. Simply put, the accident rate suggests the job is not being properly done” (p.31). Determining to what extent inadequate training is a factor in landing accidents is difficult. However, the researcher, as a flight instructor, and as an accident investigating committee member for the Civil Air Patrol, encountered several cases where inadequate instruction clearly was a factor. Also, the researcher has encountered many situations, while giving required flight reviews, where lack of knowledge resulted in poor landing technique. A Canadian study (Henley, 1991) found that “The quality of flight instruction also varies greatly because there is no standardized 5 syllabus for the instructor course” (p. 1). Canada is a member of the International Civil Aviation Organization (ICAO), as is the United States. Both countries must meet ICAO standards. Thus, the Canadian situation might also apply to the United States. Sporty‟s (1990) noted that “Landings are one of the most unique experiences in flying” (34minutes, 25 seconds). Langewiesche (1944) stated that “... the landing is to most pilots the most difficult problem in the whole art of flying” (p. 261). Langewiesche also stated that “At one time, the whole art of flying was not considered teachable” (p. 264). Even more recently Collins, L (2005) stated that “... an instructor has to let the student start teaching himself to fly and that the instructor‟s job is then to let the student go the limit – as long as it‟s safe – before taking over” (p. 225). Collins, R. (1993) stated that “The instructor‟s real role is to protect the airplane and the student while the student teaches himself how to land” (p.1). Collins, R. was supported by McSwain (2006) who stated “The ancient pelican who taught me to be a flight instructor about 100 years ago once told me his view: „We don‟t really teach students. What we do is keep them alive while they learn‟” (p. 11). Benbassat and Abramson (2002) stated that “it is specifically the landing phase that most pilots struggle with” (p.137). They analyzed only one aspect of landing accidents reported by the NTSB, the flare (the level off from the landing approach glide and raising the nose to the touchdown attitude). They found a median and mode of eight flare accidents per month for 1995 through 1997. They also found, in a survey of 134 pilots, that pilots believed the landing flare to be more difficult than nine other common flying tasks. Novice pilots reported more difficulty than did experienced pilots. 6 Bruce Landsberg (2005), Executive Director of the ASF, commenting on NTSB accident data stated “Landings are easy when you know how. Nobody does. We keep striving but not always successfully...” (p. 48). The significant number of landing accidents and incidents and the contribution of inadequate instruction to these events underlie this study‟s interest in how pilots are actually being trained to land an airplane. If inadequate flight instruction was indeed a factor in the number of landing accidents reported above, then the two research questions below arise. Problem Statement Inadequate flight instruction is a contributing factor to landing accidents and incidents. Pilots that do not learn correct procedures from the beginning of their flight training are more likely to develop unsafe habits that contribute to landing problems. There is no detailed standard of what flight instructors should teach to pilots who are learning to land so that they will develop efficient and safe landing practices. Study Focus This study examined one aspect of initial pilot training; teaching student pilots to land. More specifically, the study explored student pilot landing training from the time the airplane is first turned onto the final approach path and is aligned with the runway centerline; through the descent, level-off, touchdown, and rollout (rolling along the runway centerline on the ground until slowed) phases of a landing. The study focused on the instruction provided to student pilots prior to their first solo flight. The solo flight is a major milestone of the flight training process. The 7 instructor usually stands on the ground, with the runway in view, while the student, alone in the airplane, performs one or more takeoffs and landings as directed by the instructor. Processes were examined that were appropriate for pre-solo student pilots and that helped pilots develop safe and efficient habit patterns. Such habit patterns also form the basis for learning more advanced techniques as pilots gain experience following their initial training. The study included recommendations of experts in the field of flight training in the form of evaluation of a model of the landing process and a list of things that flight instructors should teach regarding landings. The study developed a method for determining how flight instructors actually teach. The study did not evaluate the relative effectiveness of one teaching technique or another, or of one flight instructor or another. Nor did the study evaluate the teaching of the flight instructor participants. Although there appeared to be a problem with the quality of instruction used to teach pilots to land, this study only compared the recommendations of experts with what was actually being taught. Evaluation of instruction and discussion of how things should be taught were left for further studies. Research Questions 1. What do experts in the field suggest should be taught to pilots who are learning how to land? 2. What is actually being taught to pilots who are learning how to land? The following hypothesis was established before the study began: Flight instructors teach more closely to the model as their flight instructing experience increases. 8 The first research question was answered by a literature review and by interviewing experts in the field. A conceptual model on page 18, Figure 2, depicts a summary of the findings of the literature review and the interviews of experts. The model also reflects factors that flight instructors should teach to pilots learning to land (Appendix A). The second research question was answered by a comparison of the results of 32 interviews of active flight instructors with the model. The FAA Aviation Instructor‟s Handbook (1999) stated that: The formation of correct habit patterns from the beginning of any learning process is essential to further learning and for correct performance after the completion of training. Therefore it is the instructor‟s responsibility to insist on correct techniques and procedures from the onset of training to provide proper habit patterns. (p. 1-16) This study was designed to determine the extent to which selected flight instructors teach the procedures defined by experts in the field. Before the quality of flight instruction can be judged, data must be gathered to determine how flight instruction is actually carried out. That, and not a judgment of the instructional processes, was the research focus of this study. Associated with the two research questions above were a number of subsidiary questions, that while not the focus of the study, nevertheless arose as the interview process progressed. Is there commonality of teaching methods? Do experienced instructors teach differently than do less experienced instructors? 9 What factors (specific bits of knowledge such as where to look or how to use trim) do instructors use in their teaching? How do these factors compare with those found in the literature? Are there factors taught that are not found in the literature? What variations exist in teaching common tasks such as how to level-off prior to touchdown? A section entitled Other Observations is included in chapter four and that section provides a discussion of these issues. Further study is necessary to explore these subsidiary questions in depth. 10 CHAPTER TWO: LITERATURE REVIEW Areas of Interest The literature review began with a search of educational and psychological indices subscribed to by the University of Minnesota. Several flight training magazines and journals were reviewed. The University of North Dakota Aerospace department (1000 flight students) was visited, its aviation library was searched, and several staff members were interviewed regarding the proposed study. Key factors identified by the literature review were used to develop a conceptual model of the landing process (Figure 2) and the list of items that flight instructors should teach to pilots learning to land (Appendix A). The literature review identified useful information related to: the demographics of the populations of interest (students and flight instructors) in the United States and in Minnesota; the facts and skills that must be transmitted to new pilots; recommendations for teaching pilots how to land an airplane; the seriousness of the landing accident problem; the contribution of inadequate flight instruction to the problem; and data regarding how flight instructors actually teach pilots to land an airplane. The researcher has been flying regularly since 1964, has soloed (approved a student pilot for taking off and landing with no one else in the airplane) approximately 11 100 students, and has recommended about 20 students for various flight tests including private, commercial, flight instructor, instrument, and seaplane examinations. The researcher has been the chief check pilot, safety officer, and standardization/evaluation officer of the Minnesota wing of the Civil Air Patrol, a civilian auxiliary of the United States Air Force, and has accumulated over 6800 hours of flight time of which over 3800 hours have been flight instruction related. By comparison, a minimum of 20 hours of flight time is required for a sport pilot certificate, 30 hours for a recreational pilot certificate, 40 hours for a private pilot certificate, 250 hours for a commercial pilot certificate, and 1500 hours for an air transport pilot certificate. No minimum hours are specified for various ratings such as instrument and seaplane ratings. Flight instructors must be commercial pilots with instrument ratings. For each certificate or rating pilots must obtain specified types of training and experience and must pass oral and flight tests, and for most certificates or ratings, a written test as well. Where appropriate, the researcher used his expertise to augment data from the literature review. Population of Interest The population of interest was all active flight instructors in the state of Minnesota who held flight instructor certificates valid for teaching in single engine land airplanes in addition to their required commercial or air transport pilot certificate. These instructors may be teaching in any of the enterprises mentioned in the Background section above. That is, as individuals or as a full or part-time employee of a flight school. Instructors may be flying club members who teach other members, not always for pay. 12 Instructors may be employed full-time in a non-aviation pursuit and may teach part-time in one or more of the venues mentioned in the Background section above. The Facts and Skills That Must be Transmitted to New Pilots Student pilots must pass written, oral, and flight tests to achieve a higher level certificate. The oral and flight tests are administered by an FAA inspector or by a designated examiner. The oral and flight tests are usually administered on the same day, weather permitting, and taken together are called the practical test. Recreational certificate and Sport Pilot certificate requirements are not as demanding as are the requirements for a private pilot certificate. However, flying privileges are also more restrictive than are those for the private pilot. This study involved only the landing training from the beginning of the final approach glide, through the touchdown, and rollout phases of teaching student pilots to land. The pre-solo landing training requirements are the same for Recreational, Sport, and Private certificates (Federal Air Regulations, 2005). The FAA Private Pilot Practical Test Standards (PTS) (FAA, 2002) established a baseline for the facts and skills that a pilot must possess to pass the practical test for a private pilot certificate. Instructors must prepare students to be able to demonstrate the knowledge and skills required to perform the tasks of the PTS. That document established a minimum standard for the proficiency of a private pilot. The PTS is supported by several other FAA publications including: Aeronautical Information Manual (AIM) (2005) Flight Training Handbook (1980) Airplane Flying Handbook (2004) 13 Aviation Instructor‟s Handbook (1999) Aviation Weather (1975) These resources help flight instructors determine what to teach and how to teach it, from the FAA‟s point of view. However, many tasks can be approached from more than one perspective. For example, The PTS requires correcting for wind drift in the traffic pattern and touching down without drift. The landing portion of an airport traffic pattern is shown in Figure 1. The pattern is entered at a speed lower than cruising speed and the downwind, base, and final approach legs are flown leading to the touchdown. Drift correction on the final approach leg may be achieved by using either the sideslip method or by crabbing into the wind to maintain final approach runway alignment and transitioning to a sideslip just before touchdown. The literature review revealed differences in technique among the experts. FIGURE 1. Landing portion of an airport traffic pattern. 14 Recommendations for Teaching Pilots How to Land an Airplane Numerous sources provided a framework for teaching pilots how to land a light airplane. Representative publications included the FAA Flight Training Handbook (1980), the FAA Airplane Flying Handbook (2004), Kershner‟s The Flight Instructor‟s Manual (1981), Collins‟, L. (2005) Takeoffs and Landings, Langewiesche‟s classic Stick and Rudder (1944), and many tutorial video recordings. The review of other aviation publications provided additional suggestions. This literature was summarized by the model of the landing process and by the list of things flight instructors should teach pilots learning to land mentioned above and was validated by experts in the field. The Seriousness of the Landing Accident Problem The literature review identified landing accidents as a significant portion of all flying accidents. The specific numbers are included in the Problem section above. The Contribution of Inadequate Flight Instruction to the Problem The literature review found a number of comments that suggested that inadequate flight instruction was a contributing factor to landing accidents. These comments are included in the Problem section above. The University of North Dakota (UND) Department of Aviation has a faculty of 500 and has 1500 students. Courses are offered in aviation management, airport management, commercial aviation, flight education, air traffic control, and aviation system management. One thousand flight students learn to fly in 120 airplanes located at the main campus in Grand Forks and at several satellite facilities. The Grand Forks campus was visited by the researcher in September, 2005 to learn how flight training was 15 evaluated and to explore the aviation library. UND professors and staff were unaware of any studies that recorded the actual instructional process. Flight instructors are evaluated at UND by the performance of their students. The UND library did, however, contain sources regarding recommended flight instructing technique. Files of popular aviation literature such as Flying magazine, Mentor (the publication of the National Association of Flight Instructors, NAFI), and Flight Training and Instructor Report (two publications of the AOPA) were also researched for data regarding inadequate flight instruction. Data Regarding How Flight Instructors Actually Teach Pilots How to Land a Light Airplane Nothing was found in this regard. A search of ERIC and Digital Dissertations found nothing. The International Journal of Aviation Psychology and the journal Human Factors sometimes contained articles about flying but nothing was been found in those journals about teaching flying. Model of the Landing Process This section describes how the model of Figure 2 was constructed through the literature review process and the researcher‟s experience. Beall & Loomis (1997) noted five goals in landing an airplane (p. 202): aligning the aircraft with the intended runway, reducing speed and altitude through a stable descent, arresting the descent with a landing flare, touching down, and 16 bringing the aircraft safely to a stop. The FAA (1995, tape two) suggested four phases: Final, Flare, Touchdown, and Roll-out. The model of Figure 2 includes Beall and Loomis‟ suggestions. The researcher added “establishing flare point” as an additional goal and established a “stabilized approach” as the first phase with centerline alignment second (Figure 2). This was also consistent with the FAA suggestion except that the FAA‟s Final phase was expanded to “stabilized approach”, “centerline alignment”, and “establishing flare point”. Factors that are involved in teaching pilots how to land were assimilated from a number of flight training publications during the literature review and from the researcher‟s experience. These factors were related to the six phases of the landing process model. Figure 2 shows the six landing phases and the factors involved in each phase. Figures 1 and 2 were prepared on a Macintosh computer using Claris Draw and were scanned into this document in JPEG format. The following paragraphs present the data found in the literature regarding the factors of Figure 2, augmented where appropriate, by the researcher‟s experience. 17 FIGURE 2. Model of the landing process 18 Stabilized Approach. Definition The FAA Airplane Flying Handbook (1999) advised that after an airplane had turned from the base leg of the traffic pattern onto the final approach path, the final flap (parts of the trailing edge of the wing, close to the fuselage, that when lowered increase drag to allow steeper approaches), setting should be established, power and pitch attitude (the position of the airplane‟s nose relative to the horizon) should be adjusted for the proper descent angle, and the airplane should be trimmed (a control that allows the pilot to select the airplane‟s hands-off pitch attitude) to relieve control pressure. Ideally, in a no-wind condition, the airplane would then glide to the desired level-off point without pilot control input. This constituted a stable approach. The FAA (1995, tape one) advised that a good approach sets up a good landing and that a bad approach is a setup for a bad landing. The FAA (2002) PTS required a stabilized approach for the private pilot flight test. The terms flare point, level-off point, and aim point are used synonymously in this study. The term flare is usually used to describe the process of leveling the airplane from the approach glide and raising the nose to the touchdown attitude. Level-off is the first part of the flare. The aim point is the point on the runway above which the flare begins. The touchdown point is the point on the runway where the airplane touches down, approximately 200 feet past the flare point. Jeppesen Sanderson Company, a provider of flight training material, in a 1993 video on stabilized approaches, stated that: 19 A stabilized approach is characterized by a constant rate of descent throughout the final approach and a constant airspeed until the aircraft is in position for flare or roundout. It requires the aircraft to be flown at a specific airspeed, power setting, and configuration. (2min, 23 sec) They claimed that stabilized approaches provided consistent landing accuracy, predictable landing performance, were easier to perform due to reduced workload, and allowed easier detection of destabilizing factors such as wind shear. Jeppesen Sanderson Company also noted that 24% of general Aviation landing accidents was due to landing too short or too long. Parker (2006) advised that the approach should be stabilized by the time the airplane is 500 feet above the airport elevation. Approach Parameters. Airspeed in the following paragraphs is given in knots and distance in nautical miles. One knot is one nautical mile per hour. A nautical mile is 6000 feet, in contrast to the more common statute mile of 5280 feet. Modern airspeed indicators are marked in knots and navigation publications use nautical miles. The initial altitude, airspeed, distance from the flare point, flap setting and rate of descent may vary considerably depending on the instructor‟s preferences. The FAA (1995, tape one) stated that “The glide path becomes a personal decision” (23 minutes, seven seconds). However, once these parameters have been chosen, an ideal stabilized approach results in no change in airspeed, descent rate, flap setting, or pitch attitude until reaching the flare point. 20 The length of the final approach segment of a landing may depend on the spacing of the downwind leg (a leg parallel to the runway) of the traffic pattern. Many instructors, including the researcher, teach students to turn from the downwind leg to the base leg (a leg perpendicular to the runway, shown in Figure 1) when the pilot‟s sight line to the runway threshold is at an angle of 45 degrees to the flight path. This will result in the length of the final approach equaling the airplanes lateral spacing from the runway on the downwind leg under no-wind conditions. A downwind spacing of one-half mile, recommended by some experts, would result in a rather steep final approach. For example, an approach that began at an altitude of 400 feet, one-half mile from the runway threshold, at an airspeed of 60 knots (a typical approach speed for airplanes used for initial training), would descend at 800 feet per minute at an angle of 7.59 degrees. This might be considered excessive for student pilots. Some experts recommended a descent rate of 500 feet per minute (fpm) (Cuccinello, n.d.). A downwind spacing of .8 mile (4800 feet) would place the airplane 4800 feet from the runway threshhold at the beginning of the final approach. This would yield a 500 fpm descent at 60 knots at an initial approach altitude of 400 feet. The glideslope would be 4.76 degrees. Jeppesen Sanderson Company (1993) suggested that the final approach should begin at 200 feet above the ground a half-mile from the end of the runway. This is consistent with most precision instrument approach regulations that allow a minimum descent height of 200 feet and a minimum visibility of one-half mile. This is also consistent with a 60 knot approach that began at 400 feet and a mile from the runway. 21 Jeppesen Sanderson Company (1993) used an approach speed of 70 knots in their example. This yielded an approach glide slope of 3.81 degrees and a descent rate of 467 feet per minute. Later in the video, Jeppesen Sanderson Company advised applying the last increment of flaps only when the landing is assured. Unless the power or airspeed is changed, this will change the rate of descent, negating the stability of the approach as they defined it above. Also, Jeppesen Sanderson Company advised using a visual approach slope indicator if one is present. However the three degree glideslope of most visual approach slope indicators would conflict with their recommended 3.81 degree glideslope. There appeared to be some contradiction in those suggestions. Instructors may also choose different altitudes at the beginning of the final approach to achieve a desired rate of descent or glideslope angle. They may also select different final approach speeds. The FAA (2004) recommended using the recommended airspeed in the Pilot‟s Operating Handbook (POH) or, in its absence, 1.3 times Vso. (Vso is the airplane‟s stalling speed with the landing gear down and landing flaps lowered. A stall occurs when the wing is flown at an excessive angle to the wind striking it. This results in a considerable loss of lift). Using 1.3 Vso was generally supported by the experts (Jeppesen Sanderson Company, 1993; King Schools, n.d.; Ring, 1992; Rossier, 1997). The FAA (1995, tape one) advised slowing to 1.3 times Vso when near the end of the final approach; allowing extra airspeed to maintain a safe margin above stalling speed in the event of maneuvering in the early part of the final approach. However, changing 22 speed on short final will destabilize the approach and might create an excessive workload for a student pilot. It should be noted that POH airspeeds may be given as calibrated airspeeds (corrected for airspeed indicator errors). The pilot must then apply a correction to calibrated airspeed to obtain the indicated airspeed to be flown. Also, the stalling speed in the landing configuration decreases by approximately half the percentage of the difference between the maximum certificated gross weight (the weight of the airplane and everything in it) and the actual weight flown. For example if the actual weight flown were 10 % less than the maximum gross weight, the stalling speed in the landing configuration would be five percent less than the stalling speed at the maximum gross weight. Calibration errors and actual weight should be considered in establishing the final approach speed (King Schools, n.d.). Faster speeds and higher altitudes require steeper approach glides unless the final approach distance is longer. The above examples show the wide variability possible for stabilized approaches and may explain why few experts specify exact approach parameters. The choices are the instructors‟. Power-on Approaches. Flying a stable approach is required by the airlines and seems to have been adopted by general aviation in recent years. A stable approach implies the use of power as well as pitch to establish the correct glide path. In years past, landings were taught to be made without power so that pilots would learn how to glide to a desired landing spot. This was a needed skill when flying airplanes with unreliable engines. However, since 23 the advent of reliable engines such as the one that powered Lindberg‟s epic flight in 1927 and the development of horizontally opposed air-cooled engines in the 1930s, engine failures have become a rarity. The use of power greatly simplifies the landing approach and is necessary at busy airports where pilots must fly final approach paths of varying lengths to avoid interference with other airplanes. Langewiesche (1944) stated that “Engines quit very rarely nowadays” (p. 262), and that a pilot “... ought to know how to make an extremely accurate approach and landing with power” (p. 264). There is more to a stabilized approach than just using some power. A stabilized approach implies final flap and trim settings as well as power. A power-on approach might not be stabilized but a stabilized approach is always made with power on. The stabilized approach is often established at a point about a half-mile from the end of the runway; after the airplane has transitioned from the base leg to the final leg of the pattern. In the event that a pilot must fly a longer approach due to traffic or for some other reason, the pilot may elect to defer stabilization until the last half-mile. Expert Opinions Most experts teach students to establish a stabilized approach by establishing the final pitch, power, flap, and trim settings at the beginning of the final approach and then making small adjustments as necessary to maintain the desired glide path. This helps the student adjust for the variables, usually wind related, that inevitably alter the glide path. Parker (1997), arguing for teaching stabilized approaches, stated that “A great landing happens because the pilot has successfully managed a complex set of variables” (p. 44), and that “The pilot should stabilize the aircraft at the proper approach airspeed, at the 24 proper altitude, on glidepath, and aligned with the runway‟s extended centerline” (p. 44). Parker was supported by many others including Rosier (1997) who stated that “A good landing begins with a stabilized approach on a glidepath that carries the aircraft to a predetermined aim point on the runway” (p. 51). Cuccinello (n.d.) stated that a stabilized approach results in predictable landing performance, better situational awareness, less time fidgeting with power settings, and more time concentrating on the actual approach. Stabilized Approach Factors Figure 2 shows nine factors as arrows pointing to the stabilized approach block. These factors affect achieving and maintaining a stabilized approach. Flaps. The researcher has observed that most instructors teach students to land with full flaps. Maximum flaps provide the steepest glide which makes arriving at a desired aim point easier and reduces touchdown speed. However, the added drag of the flaps reduces the time from level-off to touchdown which may not allow a student pilot enough time to establish the desired touchdown attitude. Also, the steeper approach may be disconcerting to a student pilot. In addition, a go-around (a climb-out from a rejected landing), or a touch and go (a takeoff almost immediately after the airplane touches down) with the flaps inadvertently left down, may provide marginal climb capability. For these reasons, the researcher taught half-flap approaches for many years. However, more experience and confidence convinced him that students were capable of learning to use full flaps prior to solo and that the benefits of added touchdown point precision and slower landing speeds more than offset the potential safety hazard. Also, if students learn 25 to use full flaps for normal landings during their pre-solo training, those students will develop habit patterns that will serve them well throughout their flying careers. Applying all remaining flaps at the beginning of the approach eliminates the need for a change of power, pitch, and trim associated with a change in flap setting later in the approach. Sporty‟s (1990) recommended applying full flaps when lined up on the final approach. The FAA (2004) stated that “There is no single formula to determine the degree of flap deflection to be used on landing, because a landing involves variables that are dependent on each other” (p. 11-3). Partial flaps (flaps may be lowered in increments) are usually used during gusty crosswind conditions. However, student pilots are not normally soloed in such winds or in airplanes where full flaps are not recommended for normal landings. The FAA (1995, tape one) On Landings video tapes advised using full flaps but that the last increment of flaps should be applied only after the landing is assured. This would imply that full flaps should not be applied as soon as the airplane is turned onto the final approach but at a later time. If the approach is stabilized at the beginning of the final approach, adding flaps later will destabilize the approach requiring power, pitch, and trim changes to reestablish stability. This might create too high a workload for a student pilot, close to the runway threshold. Langewiesche (1944) stated that “Flaps have the additional advantage that any excess airspeed which you may bring down to the ground can‟t bother you much. As you flare out, the flaps kill your speed in a matter of seconds, and no long floating is possible” (p. 256). This is contrary to conventional wisdom that says that diving to the runway gets 26 rid of undesired altitude but results in a longer float, negating the effect of the dive. The researcher has found that, as Langewiesche stated, the dive is effective as long as the drag of full flaps is available. However, students are seldom exposed to this technique or to other more advanced techniques. The emphasis is on the development of good habit patterns without resorting to more extreme methods. Adequate flying skills. Of all the problems associated with teaching new pilots to land, the researcher noticed that the lack of adequate flying skills prior to attempting landings is the most common hindrance to learning to land. “... it‟s a mistake to think that takeoffs and landings are the most important factors. Without the basics of aircraft handling, which should continue to be emphasized throughout your learning program, it‟s impossible to do the rest right” (Davisson, 2006). Regarding some of the tasks that pilots should master before being introduced to the landing pattern Davisson (2007) stated “Proper ground reference skills cannot be mastered in a traffic pattern, particularly at a busy airport” (p. 48). For many years, at the annual Civil Air Patrol cadet flight academy, the researcher was the instructor of last resort for cadets who were having trouble landing. In every case, the problem was that the cadet was not ready to learn landings. The solution was the same in all cases. It was to review the basic flying procedures and to establish an acceptable level of performance. After that, landings were mastered routinely and in every case (about a dozen over the years) the cadet successfully soloed. Landsberg (2001) stated that: 27 Way too many instructors rush to teach in the pattern before the student has learned the fundamentals. It may be more exciting for the instructor to save the aircraft during each landing but that‟s not way to build a solid foundation for the fledgling pilot. (p. 80) The researcher has found that students who could establish a stabilized approach with the correct power, flap, and trim settings; correct airspeed, descent rate, and pitch attitude; using outside visual references only, and who could properly align the airplane with the runway centerline, were usually ready to learn to land. The FAA (1995, tape one) noted that “A fundamental key to flying a stabilized approach is understanding the importance of the relationship between pitch and power” (14 minutes, nine seconds). This relationship is part of the basic airmanship skills that should be taught in the first few hours of flight instruction. Trim. The trim control positions a moveable tab attached to the elevator (the movable control surface attached to the fixed horizontal tail (horizontal stabilizer), or adjusts the initial position of the entire horizontal tail (stabilator). The trim tab determines the hands-off position of the elevator. The position of the elevator determines the pitch attitude of the airplane. Thus, a pilot may establish a desired hands-off pitch attitude by adjusting the trim control. The FAA (2004) advised trimming after turning onto the final approach. Kershner (2002) advised that the airplane should be trimmed for hands-off flight at all times. This eases the pilot‟s workload. King Schools (n.d.) stated that proper trim was very important. The FAA (1995, tape one) stated that “Improper trimming the airplane is probably the biggest single contributor to the whole bounced landing problem” 28 (42 minutes, 43 seconds). Collins, R. (1993) sounded a contrary note. He claimed that a trimmed airplane “takes all the feel out of a landing” (p. 4). Collins, L. (2005) pointed out that while a trimmed airplane lessens a pilot‟s workload, an airplane trimmed for a power off glide will pitch up upon application of full power during a go-around or a touch and go. This might require significant forward pressure on the control column to avoid too high a nose attitude that could cause the wing to a stall (loss of lift due to an excessive angle of attack, the angle between the wing and the wind) if uncorrected. Retrimming to reduce the forward pressure is difficult since the pilot is occupied with adjusting power and reducing flaps with one hand while pushing on the control column with the other hand and does not have a hand free for a second or two. For this reason, some pilots do not completely trim the airplane for the final approach glide. This requires back pressure on the control column to hold the nose in the desired pitch attitude. While this reduces the need for forward pressure during a go-around or touch and go, it increases the final approach workload. The researcher found that for the light aircraft most often used to train student pilots, the forward pressure needed upon application of full power is within the capability of both male and female pilots of all ages. However, heavier and more powerful airplanes (not often used for training student pilots) might very well require a different technique. Altitude control and airspeed control. These two factors are considered together. A change in airspeed will result in a change in altitude (or climb or descent rate) unless the pilot intervenes, and vice versa. For example, if a pilot raises the nose from the approach glide position, the airplane will climb (or the descent rate will decrease). The 29 airspeed will decrease unless the pilot adds power. When a pilot adds power, the airplane will climb unless the pilot pushes forward on the control column. The FAA (2004) recommended that “the power and pitch attitude should be adjusted simultaneously as necessary to control the airspeed, and the descent angle, or to attain the desired altitude along the descent path” (p. 8-3). The FAA (1995, tape two) stated that “Mastering airspeed control is the most important factor in achieving landing precision” (five minutes, eight seconds). In the past, there had been some controversy regarding how to teach airspeed and altitude control. The FAA, mostly in regard to other flight tasks such as slow flight and instrument approaches, recommended using the throttle to control airspeed and the elevator to control altitude. The flying community generally accepted this method for flying precision instrument approaches but rejected it for other tasks. The researcher and other flight instructor acquaintances, all teach the pilot to make the initial correction of airspeed with the elevator (that is, raising the nose results in an immediate reduction of airspeed and vice versa) and to use power to control altitude. However, most everyone agrees that the effect of one control on the other usually requires both an adjustment of power and pitch attitude (controlled by the elevator) as noted by the FAA above. The argument centered on which control to apply first. The researcher‟s experience has been that when a student pilot was too low on the final approach the flight instructor invariably advised the student to add power immediately. When a student allowed the airspeed to become too low, the instructor‟s first command was to lower the nose. The ability to 30 correct for altitude or airspeed deviations, almost subconsciously (tacit knowledge), is key to a student‟s readiness to learn to land. Non-stabilized Approaches A minority of instructors do not follow the FAA and experts‟ recommendations. Variations of the stabilized approach that the researcher has observed include: Gradually reducing final approach airspeed until a desired airspeed is reached over the runway threshold, Withholding final flap setting until the airplane is too high to land without adding the remaining flaps, Using a forward slip to reduce altitude, and Making a power-off approach. It has been argued that the type of approach is immaterial as long as the aircraft arrives at the level-off point at the proper altitude and airspeed. Collins, R. (1993) stated “Forget that part about having a stabilized approach from some far-out point on final to the runway” (p. 2) as long as the aircraft is properly positioned to land at the level-off point. The advantage of the stabilized approach is that it makes it easier to arrive properly at the level-off point. It has been said that a good landing follows a good approach. The researcher has found that it is easy to teach a stabilized approach and that student pilots readily adapt to it. Certainly, there are times when a stabilized approach is not feasible. Such as when air traffic control asks for maximum speed on final or asks for a short approach. However, these situations are not for the pre-solo student pilot and may be 31 taught after the first solo flight. This study is concerned only with flight instruction for student pilots who have not yet soloed. Centerline Alignment An aviation cliché is that a good landing follows a good approach. Keeping the airplane on the extended runway centerline throughout the approach minimizes the need for maneuvering as the airplane nears the runway threshold and reduces the pilot‟s workload. Centerline Alignment Factors The windsock. Almost all airports have a windsock (a tapered, fabric, polemounted tube, usually orange, that shows wind speed and direction). or other wind direction indicator that can be seen from anywhere in the traffic pattern, regardless of which runway is in use. Windsocks show both direction and velocity of the wind close to the landing surface. Usually, pilots gage the direction and velocity of the wind before arriving at the final approach. However, winds can change from moment to moment. A view of the windsock while on final approach can be a valuable aid to anticipating the need for crosswind correction. Even where wind conditions are broadcast on a special frequency, the windsock provides a more immediate indication of wind behavior. Recognition of drift. During the final approach glide the pilot must keep the airplane aligned with the centerline of the runway to avoid unsafe maneuvering near the end of the glide. Pilots must recognize and correct for any drifting from the runway centerline. This is not difficult in a no-wind situation or when the wind is blowing straight down the runway. When the wind blows at an angle to the centerline of the 32 runway (a crosswind) the wind will blow the aircraft away from the runway centerline. Teaching crosswind landings is one of the more difficult flight instruction tasks. “Most new pilots will insist that the crosswind landing is the hardest technique to master. A lot of flight instructors will agree that it‟s difficult to teach” (Collins, R. 1984, p. 41). There are two ways of countering the drift off course created by a crosswind, the crab and the sideslip. The crab. The easiest way to maintain runway centerline alignment is by crabbing into the wind. This is done by pointing the nose of the airplane a bit toward the direction from which the wind is blowing. The crab angle is the angle between the runway centerline and the direction in which the airplane‟s nose is pointing. Light winds may require only a few degrees of crab while stronger winds may require a crab angle of twenty degrees or more. While the crab is a fairly easy way of compensating for crosswinds, the airplane must not be allowed to touch down at an angle to the runway centerline. Doing so can damage the landing gear which is not designed to withstand significant side loads, except in the case of airplanes designed with crosswind landing gear which are rarely used for ab initio instruction (the now classic Aircoupe being an exception). Prior to touching down, the crab must be converted to a sideslip, as described below, to avoid landing with a side load on the landing gear. If the change from a crab to a slip is delayed until just before touchdown, as recommended by some experts, the change requires accurate timing and correct use of the controls. 33 The sideslip. When an aileron (the movable control surface at the wingtip) is raised, the wing will lower and the airplane will begin to turn in the direction of the lowered wing. The aileron on the opposite wing moves down to raise that wing, enhancing the effect. The airplane is said to be banked in the direction of the lowered wing. The ailerons roll the airplane around the airplane‟s longitudinal axis. A banked airplane will turn in the direction of the bank. The turning motion of a banked airplane may be arrested by the application of opposite rudder (the movable part of the vertical tail, controlled by rudder pedals, that moves the airplane around the vertical or yaw axis). For example, if the airplane is banked to the left, the pilot may stop the left turn by pressing on the right rudder pedal. The rudder is used to yaw the airplane around the airplane‟s vertical axis. When a turn is arrested in this manner, the aircraft will actually slide sideways through the air in the direction of the lowered wing. This is called a sideslip. Properly done, the airplane can be made to slide sideways into the wind as fast as the crosswind is pushing the aircraft away from the runway centerline. The aileron is thought of as controlling the amount of slip into the wind and the rudder is simply used to keep the nose straight (the longitudinal axis of the airplane aligned with the runway centerline). This is a much more difficult maneuver to learn and to teach then the crab but it has the advantage of allowing the airplane to land in that attitude because there is no side load on the landing gear. In strong crosswinds, the aircraft might be banked to the extent that the touchdown is made first on the wheel on the side to which the airplane is banked. 34 There are at least four schools of thought regarding which method of compensating for crosswinds should be taught. Some instructors (the researcher included) teach pilots to begin the sideslip as soon as possible after turning onto the final approach course. Others teach the crab method until almost down and then teach switching to a sideslip for the touchdown. Still other instructors teach pilots to use the crab method until some point comfortably above the ground, and then to transition to a sideslip for the remainder of the approach glide. This is called the combination method. This method has the advantage of using the easier crab method on the early part of the approach where the winds may be stronger (winds often increase with altitude). Also, crosswinds are often gusty, requiring the pilot to make constant corrections with the ailerons and rudder. On occasion, the wind may be so strong at the initial approach altitude that the airplane does not have sufficient aileron or rudder control, or both, to compensate for the crosswind using the sideslip method. In that event, as much sideslip as the aircraft is capable of may be combined with as much crab as is required to stop the drift. This method, which might be called a simultaneous method, will allow the airplane to proceed down the runway centerline but does not allow landing in that crabbed condition. However, since the wind often diminishes as the airplane glides lower, the crab might become unnecessary, and the sideslip sufficient, as the airplane nears the ground. If the centerline cannot be held with a slip alone, the wind is probably too strong to allow a safe landing and the landing should be aborted. This is an advanced technique that is unlikely to be taught to a student pilot. 35 Initial instruction focused on how to land an airplane is intended to prepare the pilot for his or her first solo flight. An instructor might teach landings in difficult wind conditions that the instructor would not allow the student pilot to experience alone. This can build a margin of skill and confidence that will serve the pilot well on the first solo flight. Instructors generally allow a first solo flight only under close to ideal conditions with only light crosswinds. Thus, the crosswind techniques of crabbing and converting to a slip at the last instant, the combination method, or the simultaneous method might be reserved for more experienced pilots. Langewiesche (1944) pointed out that a tricycle gear airplane is inherently stable when landed with some side load on the landing gear. That is, the airplane will tend to straighten itself to align the nose with the forward motion of the airplane. Thus, landing with the nose a bit cocked into a crosswind, would, within limits, be safe. He inferred therefore, that crosswind correction is not too critical for tricycle gear airplanes. By contrast, landing a tailwheel airplane (an airplane with the third wheel under the tail rather than under the nose, now obsolete for ab initio instruction) with the nose the least bit crooked, would result in the beginning of a ground loop (an uncontrolled swerve) due to the tailwheel airplane‟s inherent instability when subjected to side loads on the landing gear.. The FAA Airplane Flying Handbook (2004) explained both the slip method and the crab and last instant conversion to a slip method and stated that “The wing low method is recommended in most cases although a combination of both methods may be used” (p. 8-13). Leighton Collins in his 1981 book on takeoffs and landings, republished 36 by his son Richard (himself a prolific writer and recognized aviation expert) in 2005, argued for the crab and last instant conversion to a slip method. “When it comes to a strong crosswind in a landing, and most especially if there are strong gusts, it seems to me that the crab method offers more and better options” (p. 203). Collins, L. also stated that “The key element in the crab method is a precise feel for the airplane” (p. 204). Richard Collins (1984), in an article on crosswind landings, while describing both the slip and crab methods, stated that he used the crab method in his own flying. A contrary note was sounded by Dorion (2005). He had over 14,000 hours of flying time in military and civilian aircraft. He described the slip method as an Air Force procedure and the crab method as a Navy procedure. He stated that he used the slip method for his airline flights. Dorion also stated that “I believe that putting crosswind rudder in during the flare is taking an unnecessary risk and flying doesn‟t need any more risk” (p. 10). The researcher called Mr. Dorion and discussed the pros and cons of the two methods. Mr. Dorion, now retired, admitted that the crab method has some advantages but that it is too tricky for inexperienced pilots. Since the slip method had worked for him in aircraft from trainers to airliners, why use the crab? However, he agreed that some experienced pilots might find the crab useful but that their experience mitigated the added risk. The researcher‟s experience is that student pilots do not have the precise feel for the airplane mentioned by Collins, L. (2005) and that the crab method is best reserved for more experienced pilots. Kershner (2002) provided an additional perspective in his widely read flight instructor‟s manual. He stated that “The most comfortable as well as an easy, crosswind 37 approach and landing for the more experienced pilot is a crab approach and a wing-down landing” (p. 139). However, he also stated that “Many instructors use the wing down method for the approach and landing for students because there is often a problem in the transition from the crab to the wing-down procedure” (p. 139). King Schools (n.d.) recommended the combination technique with the transition from a crab to a slip occurring when close to the runway threshold. Sporty‟s (1990) recommended the slip method because students were too likely to land with a side load on the landing gear due to inadequate crosswind compensation when transitioning from the crab to a slip just before touchdown. Marsh (1996) claimed that the argument was over and that most flight schools were teaching the crab method. Establishing Flare Point The flare is the process of leveling the aircraft from the final approach glide and raising the nose so that the aircraft will touch down on the main landing gear only. The nose wheel is not designed to withstand the same landing loads that the main gear may encounter. The FAA (2004) defined the roundout or flare as “... a slow transition from a normal approach attitude to a landing attitude...” (p. 8-5). King Schools (n.d.) stated that “The roundout or flare is a slow smooth transition from approach attitude to landing attitude” (14 minutes, 57 seconds). The flare point, or aim point, is that point on the runway above which the flare begins, It is important to flare at a point that allows a landing close to the beginning of the runway so that a maximum amount of runway remains for floating just above the runway as the airspeed diminishes and for deceleration after touchdown. The shorter the runway, 38 the more critical establishing the flare point becomes. The FAA (2004) stated that “The selected landing point should be beyond the runway‟s approach threshold but within the first one-third portion of the runway” (p. 8-1). Sporty‟s also advised landing in the first one-third of the runway. The landing point will usually be about 200 feet or so beyond the flare point due the aircraft floating just above the runway as the speed diminishes. King Schools (n.d.) noted that the aim point is not the touchdown point. The FAA is silent regarding how to establish the touchdown point. It would seem that establishing the aircraft level-off point would simply be a matter of aiming the nose at the desired point and leveling off when the airplane gets there. However, the level-off should begin with the airspeed at a desired value, usually 30 percent higher than the airplane‟s stalling speed in the landing configuration. If the airplane is too fast (usually caused by beginning the approach at too high an altitude), the airplane will float down the runway while the speed is being dissipated. This may result in insufficient runway remaining after touchdown to decelerate to a safe turnoff speed. If the approach is begun at too low an altitude, the resulting shallow glide angle might result in airspeed too low to be safe. Establishing Flare Point Factors Visual cues. Flying the airplane so that it arrives at the desired flare point over the runway with the proper airspeed and at an altitude appropriate for beginning the level-off (approximately 10 feet above the runway) requires practice and instruction. Given enough practice, students will eventually master the task. However, they may have learned by rote and will be unable to compensate for traffic patterns that, due to traffic or 39 air traffic control instructions, will place them on the final approach higher or farther from the runway than usual (Kershner, 2002, p. 125). A procedure for adjusting the glide path is needed that will work regardless of altitude, airspeed, or distance from the runway, and that will also indicate the need to go around in the event that these parameters are not within the capability of the airplane to arrive at the aim point without excessive airspeed or altitude. Point/power. One school of thought is to teach the pilot to point the nose at the intended level-off point and to control the airspeed with power. This works unless airspeed and final approach altitude are too high to begin with and closing the throttle does not result in sufficiently lowering the airspeed. The pilot may then be tempted to dive at the runway, resulting in excessive airspeed, a higher descent rate, and creating flare problems. (FAA, 2004, Collins, l., 2005). The researcher has encountered no one who teaches this method, possibly because it does not work in all situations. Diving at the runway. The researcher has discovered, by trial and error, and supported by Collins, L. (2005, p. 167) that when landing modern training airplanes with full flaps (the usual configuration), diving away altitude (and thereby picking up unwanted additional airspeed) will result in landing closer to the intended point than will remaining above the desired glide path while maintaining the desired approach speed. Evidently, the added drag of the flaps due to the increased glide speed, more than offsets the floating effect of the increased glide speed. However, this and other approach variations are best left to experienced pilots. 40 Stationary spot technique. Langewiesche (1944) suggested that pilots learn to judge the flare point by remembering the particular perspective (the shape of the runway) that goes with the aircraft‟s particular gliding angle. Langewiesche also provided a method for accurately determining where the airplane would impact the ground if it was not flared. “As an airplane is gliding toward a certain spot on the ground, that spot, as seen by the pilot, remains always in the same relationship to the horizon, as seen by the pilot” (p. 276). Thus, if the pilot sees that the intended flare point is remaining fixed in its position relative to the windshield, then that spot will be where the aircraft should be flared. If the flare point (spot) appears to move up in the windshield, the flare will occur before the spot and the aircraft will land short of the desired touchdown point. Conversely, a spot that moves down in the windshield forecasts a long landing. Knowing that unless the approach glide is adjusted, the aircraft will land short or long allows the pilot to take corrective action. This technique was supported by King Schools (n.d.) and Sporty‟s (1990). The researcher‟s experience is that this technique can be taught to beginning pilots and that once learned, every landing will touch close to a predetermined spot. Given a stabilized approach, the stationary spot technique will work with long or short, fast or slow, flap or no flap approaches. The pilot need only adjust power and pitch attitude so that the aim point is stationary in the windshield regardless of whether the approach is long due to air traffic control direction or is a short, steep approach at a field with no control tower. If the airspeed is excessive with the throttle closed, or if the approach began at an excessively high altitude, it may not be possible to stabilize the spot 41 and at the same time, maintain the desired approach speed. In such cases, a go-around is advisable. The stationary spot technique also compensates for runway width illusion problems that occur with abnormally wide or narrow runways. When landing on a wide runway, a pilot experiences the sensation of being too low. A narrow runway induces the sensation of being too high (Wilson, 1993 in Galanis, Jennings, & Beckett, 2001; King Schools, n.d.). The researcher has also found that other illusions, such as the black hole effect, flying into the ground at night (Galanis, et al,), and the mesa illusion (King Schools, n.d.) such as landing at an airport on top of a steep hill (for example, the Catalina Island airport), are all avoided by using the moving spot technique. Jeppesen Sanderson (1993) also supported the stationary spot technique for the reasons above. Windows. Collins, L. (2005), supported by the FAA (1995), suggested that pilots subconsciously remember how things look when the approach glide is correct and will adjust accordingly. He suggested that a pilot should visualize a set of windows along the desired glide path, the final window being at the flare point. The pilot should fly the aircraft through the set of imaginary windows. This is a variation of a technique that suggests that a pilot should aim the aircraft at the flare point while adjusting power to maintain the desired glide speed. Others who supported Langewiesche‟s stationary spot technique included Davisson (1996), Laboda (1997), Parker (1997) (Parker also supported the series of windows method mentioned above), Namowitz (2005), and Rossier (1997). Although these and other experts supported the stationary spot technique, the researcher has not 42 seen similar interest among his flight instructor acquaintances. It is suspected that many instructors subscribe to Leighton Collins suggestion that students teach themselves and that the instructor rides along as a safety pilot. Such a process might work but might also be very inefficient. After all, that was how the Wright brothers learned, at the expense of many crashes. It might take many hours of flight for the visual perspectives mentioned by Collins, L (2005) above to become ingrained. Meanwhile, the student might continue to practice the same errors. Visual approach slope indicators. Visual approach slope indicators usually consist of a lights placed alongside the approach end of the runway. These lights are arranged so that pilots see a particular light pattern when the airplane is on the glide path for which the system is designed. For example, one type of indicator, the VASI (visual approach slope indicator) system is usually designed so that two lights will appear to be white and two lights will appear to be red when the airplane is gliding at a three degree angle down from the horizontal toward an aim point approximately 600 feet from the approach end of the runway. (Electronic instrument landing systems are also usually designed for a three degree glideslope). If all lights are red, the airplane is significantly low. If all lights are white, the airplane is significantly high (AIM, 2005, p. 544). The researcher‟s experience is that most instructors teach students to aim for the numbers painted near the approach end of the runway (or for a runway marker close to the approach end of a turf runway). This point is usually much closer to the approach end than the 600 foot flare point of the VASI system. Also, in the absence of visual approach slope indicators most instructors teach an approach that is steeper than the three degrees 43 noted above. For these steeper approaches, a VASI will show all lights white until the airplane is close to the aim point. When the airplane glides below the three degree glideslope, due an aim point closer than 600 feet to the end of the runway, the VASI will show all lights red. (When in the clouds making an instrument landing, a pilot has no choice but to follow the electronic glideslope and centerline alignment [localizer] instruments mounted in the instrument panel). Instructors must deal with these differences when teaching how to use visual approach slope indicators. They must teach either a three degree approach path (Pardo, 2004), which would require beginning the final approach farther out than a half-mile (about 1.27 miles at 60 knots and 400 feet); or teach leveling out on final from the base leg at a much lower altitude (probably not too safe); or defer the stabilized approach by reducing power until the airplane sinks to a three degree approach path and then adding power to sustain three degrees; or teach the steeper approach usually used by light training airplanes, using the visual approach slope indicator only as an aid to avoid becoming excessively low. Discussion of this quandary has not been found in the literature. Perhaps because of the many possibilities of final approach length, descent rate, airspeed, and initial final approach altitude, the FAA has not recommended specific traffic pattern dimensions and descent rates. The researcher believes that visual approach slope indicators add to landing safety, especially at night, but that students must be taught their characteristics and how to use them effectively. Chapter four identifies what flight instructors teach so that the 44 aircraft arrives at the desired flare point at the proper altitude (approximately 10 feet), the proper airspeed, over the centerline and without sideways drift. Forward slip. A forward slip is a means of losing altitude when the airplane is too high to level off at the desired flare point. A forward slip is accomplished by lowering a wing and applying full opposite rudder. If a crosswind exists, a wing is lowered toward the crosswind. Otherwise either wing may be lowered. Correct aileron deflection will keep the airplane moving down the runway centerline but the fuselage will be positioned at an angle to the descent path. This presents more fuselage surface area to the wind and significantly increases drag. The result is a steeper descent without increasing airspeed. Earlier, tailwheel airplane trainers did not have flaps to increase drag to enable a steeper descent without increasing airspeed. A forward slip was a commonly used maneuver to correct final approach altitude problems and to enable steeper descents when desired. However, with the advent of modern, tricycle gear trainers that had flaps, the forward slip became superfluous. Also, due to undesirable aerodynamic interaction of flaps and elevator, Cessna placarded their airplanes advising pilots to avoid slips with flaps extended. Nevertheless, the FAA (2002) Private Pilot Practical Test Standards required that applicants be able to demonstrate a forward slip. The FARs (2005) part 61.87(d) (14) require that student pilots be trained in “Slips to a landing ...” (p. 76). This requirement is somewhat ambiguous since the requirement could be referring to the sideslip used to compensate for a crosswind. The researcher‟s experience is that most instructors teach both the sideslip and forward slip prior to authorizing a student to solo. 45 The two slips are performed in the same manner. A forward slip may be thought of as an exaggerated sideslip. Level-off “Son, if you keep doing that, someday you‟re going to hurt yourself” was the total landing instruction given to the researcher in his first attempts at landing an Aeronca in a plowed field. Level offs were too high due to fear of crashing into the ground. The researcher has since learned that this is a common tendency during initial landing practice. Not much better was later instruction that consisted of “You‟re coming in crooked”, when landing in a crosswind. The researcher finally learned to land from books and from conversations with others. Student pilots deserve better. The researcher, for the purpose of analysis, chose to analyze three components of the transition from the approach glide to touchdown. These were the level off, discussed in this section; raising the nose to the touchdown attitude; and the touchdown itself, discussed in the next section. The first two components constitute the flare. The touchdown follows the flare. Level Off Factors Visual cues. Benbasset & Abramson (2002) have studied the flare process extensively. They concluded that: Pilots rely on monocular visual clues to judge level off height (Benson, 1999; Bond , Bryan, Rigney and Warren, 1962; Langeweische, 1972; Nagel, 1988), 46 Monocular depth perception is learned or dependent on experience (Benson, 1999; Bramson, 1982; Langeweische, 1972; Love, 1995; Marieb, 1995, Tredici, 1996), Improper level offs contribute to a significant number of landing accidents, and Improper flares affect pilots‟ self esteem and contribute to an increase in the time to solo, dropout rates, self-esteem and self-efficacy. Beal & Loomis (1997) stated that “...research has established that landing an aircraft can be performed as well with one eye as with two (Lewis, Blakeley, Masters & McMurty, 1973; Lewis & Krier, 1969; Plaffman, 1948; Riordan, 1974” p. 206). Langeweische (1944) stated that “...the judgment of height in landing can be broken down into teachable, learnable details” (p. 296). He suggested that the pilot look several hundred feet down the runway and that the pilot would soon learn the perspective of the objects in view at the height appropriate for beginning the level off. This was supported by Parker (2005) who advised “...your primary focus should be out ahead of the airplane” (p. 40). Ring (1992) stated that “Looking farther down the runway will give you a better visual situation of where you are in the landing process, especially when flaring for touchdown” (p. 57). Sporty‟s (1990) advised focusing far enough ahead to see clearly. Focusing too closely to the airplane will result in blurring due to the motion of the ground relative to the airplane. Namowitz (2006) stated: Look a good distance down the runway during your landing. Looking too close to the moving aircraft blurs the images, distorts relative motion, and creates an urge 47 to rush things. This single adjustment can lead to vast improvements in landing. (p.40) The researcher‟s experience is that failing to look far enough ahead of the aim point is the major cause of improper flares. Langeweische (1944) wrote of a perspective shift that occurred when the airplane rose or sank. He advised that this shift could be seen while standing by looking ahead and rising up and then sinking and noting the perspective shift of the objects viewed. The FAA (2004) stated that “...the visual cues used most are those related to changes in runway or terrain perspective and to changes in the size of familiar objects near the landing area” p. (8-5). The researcher discovered that the above perspective shift could be taught as an aid to judging when to flare. Students are taught, as Langeweische (1944) suggested, to slowly bend their knees while looking ahead but not moving forward. They were instructed to look ahead and to note the shift in perspective. The ground appeared to rise up. A similar effect was seen from the cockpit. Key to this technique was looking ahead. The researcher learned to look ahead about a football field length and has so taught his students. The distance is not critical but there are limits. King Schools (n.d.) recommended looking as far ahead as one would look while driving a car at the same speed. Looking too closely over the nose resulted in a delayed perception of being close to the ground and usually resulted in a frantic, last second pull up and a balloon that often required instructor intervention. Looking too far ahead usually resulted in too low a level off and might also require the attention of the instructor. 48 Teaching students to look ahead and to watch for the perspective change allowed the researcher and a few of his CAP Flight Academy fellow instructors to safely solo some students with only ten practice landings. Such students seldom needed to go around and go-around training was then conducted in addition to the ten practice landings. Seat height. The use of visual cues implies that the pilot sits high enough to see out the windshield. “A high hurdle the pilot has to clear for good landings is the annual growth, small but steady, in the height of most of our instrument panels” (Collins, L, 2005). The researcher found that a student‟s line-of-sight that passed through the windshield at about six inches above the instrument panel was adequate. If the student‟s line of sight was less than six inches above the instrument panel, the student was provided with a seat cushion. Low pass. Students are sometimes afraid of the ground when first learning to land, as was the researcher as noted above. This fear causes them to lose focus on the stabilized approach, centerline alignment, and leveling off properly. To remove the fear and to refine approach skills, the researcher and others tell the student beforehand that they will practice the approach only and will not attempt to touch down. At an altitude of 50 feet or so, the instructor tells the student to slow-fly (a technique taught during the student‟s first few hours of instruction) above the runway while maintaining centerline alignment using a sideslip. This provides practice in controlling the airplane close to the ground without the fear of landing. The King Schools (n.d.) video recommended low passes to familiarize students with the slip method of compensating for crosswinds. The video showed an airplane 49 sliding across the runway centerline to the left and then to the right by the use of the ailerons while keeping the fuselage parallel to the runway centerline by use of the rudder (By coincidence, the pilot of that demonstration was a participant in this study). The instructor may further relieve anxiety by controlling the throttle. The student then has one less item to worry about. When the student shows progress in low passes, throttle control may be relinquished by the instructor. As the student progresses, the instructor may call for lower altitudes. Finally, when all is well, the instructor may call for a pass at the normal level-off altitude of about ten feet. The instructor closes the throttle at the flare point and instructs the student to raise the nose and to hold it in the touchdown position (this requires increasing back pressure on the controls and the instructor may remind the student to keep pulling). A good landing usually results and the instructor may then congratulate the student on making a good first landing. The researcher has found this technique to be very motivating. If kept from botching landings at first, the student will maintain a positive self-image and will make rapid progress. After a few low passes, the researcher‟s experience is that most students were ready to learn the flare, touchdown, and rollout. Machado (2006) stated that “... fly nearly the entire length of the runway at just a foot off the ground at a slow speed using the sideslip method to track the centerline. A few sorties of doing this will give you a good idea of exactly how to use the sideslip for crosswind control” (p. 51). Power removal. The researcher has observed that most instructors tell students to close the throttle as the airplane is leveled, assuming that the student has been carrying some power during the final approach. Power not removed will reduce the sink rate and 50 will increase the distance before the airplane touches down. Touching down with some power is reserved for gusty, windy conditions that students will not experience during their solo flights. Touchdown The FAA Airplane Flying Handbook (2004) stated that: The touchdown is the gentle settling of the airplane onto the landing surface. The roundout and touchdown should be made with the engine idling and the airplane at minimum controllable airspeed, so that the airplane will touch down on the main gear at approximately stalling speed. As the airplane settles, the proper landing attitude is attained by application of whatever back-elevator pressure is necessary. (p. 8-6) Touchdown Factors Nose attitude. King Schools (n.d.) stated that the airplane should touch down at the lowest possible speed with the control wheel full back and within the first third of the runway. Kershner (2002) stated that “The nosewheel airplane should be landed at the same attitude as a comparable tailwheel airplane” (p. 115). Kershner was referring to the fact that a tailwheel airplane was usually landed in a three point attitude with the nose high enough to restrict the pilot‟s forward vision. This same attitude, in a tricycle gear airplane, will assure landing on the main gear with the nosewheel clear of the landing surface. The nosewheel of a tricycle gear airplane is not as rugged as is the main landing gear and must be protected from landing stresses. After touchdown, the nosewheel is allowed to descend to the surface. Collins, L. (2005) stated that 51 The tricycles are easier to land because, while they need to be landed tail low, in contrast to the taildragger (here Collins was referring to a wheel landing which can be made in an almost level attitude) there‟s no critical value on how low. The lower the better in many situations, but the key thing is to get the tail low enough to avoid a nosewheel-first touchdown. (p.186) The researcher‟s experience is that teaching pilots to land with the nose up enough so that the nosewheel makes contact with the landing surface only after the main landing gear touches requires constant reminding of the student pilot. Terms such as “hold it off”, “don‟t let it land”, “keep it in the air”, “keep the back pressure on”, and the like, are used to encourage the pilot to allow the airplane to dissipate its energy in the air and to slow down in the air until the airplane can no longer sustain flight, before touching down. As the airplane slows, the horizontal tail control surface (elevator or stabilator) becomes less effective and requires increasing back pressure on the control wheel to maintain the desired nose high attitude. Additionally, when within a wingspan distance from the ground, ground effect also causes the horizontal control surface to lose effectiveness. Student pilots should be trained to anticipate the need for increasing back pressure as the airplane settles to the ground. Since kinetic energy increases as the square of velocity, slower landings are safer. Should a landing go bad, less energy equates to a lower probability of damage. Ring (1992) stated that “If the airplane is flown to the runway with a stabilized approach, the landing is simply a matter of closing the throttle, raising the nose, and waiting for the wheels to touch” (p.57). The researcher concurs. 52 Gusts/turbulence. The FAA (2004) stated that “One procedure is to use the normal approach speed plus one-half of the wind gust factors” (p. 8-15). The FAA also stated “To maintain good control, the approach in turbulent air with gusty crosswind may require the use of partial wing flaps” p. (8-16). The researcher‟s experience is that most instructors teach adding half the gust velocity to the approach speed but that some instructors teach the use of partial flaps in crosswinds regardless of gusts. Crosswind correction. Crosswind techniques have been described above. If the sideslip method is used, the airplane will touch down on the upwind wheel, in a strong crosswind. As the airplane slows, the controls lose effectiveness, the downwind wheel will touch, and the nose wheel will descend to the landing surface. To avoid drifting downwind during the landing rollout, additional aileron deflection into the wind is required as the airplane slows. The researcher has found that with tricycle gear airplanes, the amount of additional aileron deflection needed is difficult to judge, in contrast to a tailwheel airplane where precise aileron control is necessary and drift is more apparent. The researcher instructs students to apply full aileron into the crosswind during the landing rollout. As soon as the nosewheel touches, it becomes effective for maintaining directional control via the rudder pedals. The nosewheel is usually connected to the rudder pedals and is used for steering on the ground. Collins, L. (2005) described the touchdown technique when using the crab and last instant runway alignment method. He advised keeping the wings level with ailerons and swinging the nose around from the crab to alignment with the runway by using the rudder. If the timing is correct, the airplane will touch down before the 53 crosswind has had time to accelerate the airplane downwind. “The airplane has to have time to accelerate to the full drift component of the crosswind. It can‟t accelerate to this immediately” (p. 203). As noted above, the researcher and others suggest that this technique should be reserved for pilots beyond the pre-solo stage. Recoveries from skip, bounce, or balloon. Excessive speed, improper nose attitude or a gust of wind may cause the airplane to skip or to bounce as it touches down. The FAA (1995, tape one) stated that ballooning (and in the researcher‟s experience, many landing problems) is usually caused by excess airspeed and poor flare technique. Experienced pilots may reestablish the correct pitch attitude and may use power to arrest the descent to assure a safe touchdown. Inexperienced pilots might not react correctly or fast enough to correct the situation. The instructor must decide to what extent students should be taught to salvage a bad landing and when to add power and go around. A skip is of little consequence as long as the pilot maintains directional control and the proper touchdown nose attitude. Langewiesche (1944) summarized what in the researcher‟s experience is the accepted method for an experienced pilot to recover from a bounce. He stated: If you bounce, concentrate your attention on the attitude of the airplane. Do with your stick whatever is necessary to put the airplane into a three-point attitude (referring to the tailwheel airplanes used for training at that time but an attitude also appropriate for landing modern tricycle gear trainers), that is, into the attitude in which it sits on the ground (referring to the tailwheel airplane‟s nose high attitude at rest on the ground); and, once you‟ve put it into this attitude, do with 54 the stick whatever is necessary to hold it there. And, if the bounce was at all severe, be ready with the throttle to feed a blast of power, to keep from dropping in too hard. (p. 294) Kershner (2002) explained how to correct for ballooning that results in a nosehigh, low airspeed too high above the ground for the airplane to land gently; often caused by a severe bounce or an abrupt level off. He advised stopping the forward movement of the control wheel, using power as required, and being ready with the elevator control as the surface is approached (implying reestablishing the nose-high touchdown attitude) thus supporting Langewiesche (1944). The FAA (2004) supported the use of pitch and power control to recover from bounces and balloons as explained above. The FAA added that “When ballooning is excessive, it is best to EXECUTE A GO-AROUND IMMEDIATELY; DO NOT ATTEMPT TO SALVAGE THE LANDING” (p. 8-30) and “When a bounce is severe, the safest procedure is to EXECUTE A GO-AROUND IMMEDIATELY. No attempt to salvage the landing should be made” p. (8-31). Roll-Out An old dictum that was commonly heard during the heyday of the tailwheel airplane was to fly the airplane all the way to the tiedown. The idea being that given the directional instability of a tailwheel airplane on the ground (the tendency to ground loop) a sudden gust of wind could cause a problem, even for a slowly taxiing airplane. Although tricycle gear airplanes are much more stable on the ground than are tailwheel airplanes, they are not invulnerable, particularly during the landing rollout. 55 Rollout Factors Alignment and drift correction. The FAA (2004) stated “The landing process must never be considered complete until the airplane decelerates to the normal taxi speed during the landing roll or has been brought to a complete stop when clear of the landing area” (p. 8-6). Generally, all a pilot needs to do during rollout after touchdown is to maintain directional control by using aileron into any crosswind and by keeping the fuselage aligned with the runway using the rudder pedals which control the steerable nosewheel on the ground. If crosswind control is neglected the airplane may drift downwind as the rollout progresses. Once the nosewheel is on the ground, full aileron into the crosswind may be applied as the airplane slows and the aerodynamic controls lose effectiveness (King Schools, n.d.). Braking. The FAA (2004) pointed out that the brakes may also be used to aid directional control since each main landing gear wheel is braked independently by pushing the tip of the associated rudder pedal (toe brakes). Some modern aircraft have no nosewheel steering and brakes are the only means of directional control at taxi speeds. A few airplanes can only brake both main wheels simultaneously, as do automobile brakes. The researcher and most of his colleagues teach only limited use of the brakes to student pilots since too aggressive braking can introduce landing directional control problems, can flatten tires, and can sometimes substitute for proper rudder usage. The FAA (1995, tape two) noted that the brakes are ineffective until the airplanes has slowed to less than 75 % of the touchdown speed. Prior to that speed, aerodynamic braking (the drag created by the nose high attitude and the flaps) is effective. Holding the wheel back as the 56 airplane slows helps keep the airplane‟s weight on the main landing gear wheels and improves braking. . Touch and go or full stop. There is a difference of opinion among flight instructors regarding the efficacy and safety of touch and go practice landings. Machado (2005) trained students to do touch and goes to save time, especially if the traffic pattern was crowded. He claimed that twice as many landings could be accomplished doing touch and goes versus full-stop taxi back landings. Turner (2002) stated “Flying a touch and go is a very workload-intensive maneuver, and often the pilot is overloaded to the point he or she does not adequately compensate for directional control forces” (p. 67). Wright (2006) cautioned that students may forget to raise the flaps before applying takeoff power leading to marginal ability of the airplane to climb out of ground effect. Collins, R. (2006) stated: ... it has always been my opinion that touch and go landings are a questionable practice. They do not replicate actual arrivals and departures. ... the FAA requires three takeoffs and landings to a full stop before passengers are carried at night. (p. 34) Collins, M. (2003) reported on a survey of flight instructors who responded to an AOPA survey regarding Turner‟s (2002) article. Fifteen percent were opposed under any circumstances, thirty percent endorsed the concept, and 55 percent used touch and goes selectively. The researcher has taught touch and goes without incident for many years but has observed other instructors who avoid the practice. Given long runways, some 57 instructors teach stop and goes where the airplane is brought to a full stop and then immediately takes off again. Other Factors There are other factors involved in teaching pilots to land in addition to the factors associated with the six landing phases discussed above. Most of these factors apply to flight instruction in general. Looking for Traffic. The researcher has found that teaching students to continually look around for other airplanes is much more difficult than teaching the mechanics of flying, perhaps due to inadequacies in the researcher‟s initial training. During flight, both the student and instructor are focused on the task at hand and often forget to keep looking around. The researcher has found that teaching students to continually divide their attention between outside visual references, including scanning for traffic, and the instrument panel to be effective. However it requires constant repetition. Students often concentrate on the task at hand and can become overloaded when asked to perform another task at the same time. The instructor may focus only on the student‟s performance and may not perform an adequate watch for traffic. Although mid-air collisions are rare, the consequences are severe when they occur. The AOPA Air Safety Foundation (2006) found that 48% of collisions occurred in the traffic pattern and that 76% of those occurred during approach and landing. 58 Go-around. A go around is a maneuver executed when a pilot determines that the risk of continuing the landing is unacceptable. A go-around may be initiated when a traffic conflict occurs, when the approach becomes destabilized, when the landing would be too far down the runway to allow a safe roll-out, when called for by air traffic control, when the wind becomes too difficult to handle, or for other reasons. Students are usually advised to go-around rather than to try and correct a potentially dangerous situation. The FAA (2002) private pilot PTS includes the go-around as a task to be demonstrated. The FAA (1995, tape two) stated that “A properly executed go-around is one of the best accident avoidance procedures available to pilots” (35 minutes, 25 seconds), and that pilots should be mentally prepared to go around on every approach. Landsberg (2001) stated that: A cardinal rule that every student should know and be tested on is to go around immediately if the aircraft is not on the ground in the first third of the runway. Students should practice this with a CFI (certificated flight instructor) but shouldn‟t need prompting to initiate the go-around. (p. 68) Davisson (2000) stated that “Going around seems to be against many pilots‟ principles (p. 18). He advised that “If it doesn‟t look or feel right, it isn‟t right. Then take it around” (p. 20). The researcher has observed what might be considered a macho tendency, particularly among instructors, to refuse to give up a landing that has begun to deteriorate and to attempt to salvage the situation in spite of obvious risks in doing so. 59 The Civil Air Patrol Flight Academy held annually in Minnesota, requires students to make three go-arounds, either for cause or artificially induced by the instructor, before cadets are allowed to solo. The go-around is taught as a routine task, not as an emergency procedure. Psychological Factors. The FAA Aviation Instructor‟s Handbook (1999) summarized the cognitive, psychomotor, and affective learning domains. The handbook contained practical examples of the application of learning theory. Instructors were advised to avoid behavior that students may perceive as threatening, to provide positive rather than negative motivation, and to counter anxiety by reinforcing students‟ enjoyment of flying. Machado (1999) stated that “Flight Instruction is more of a people skill than a teaching skill” (p. 65). While it may be argued that people skill is an integral part of effective teaching, nevertheless, Machado supported the FAA‟s (1999) advice that flight instructors need to pay attention to the psychological factors involved in learning. Physiological Factors. An airplane is a noisy and sometimes uncomfortable classroom. Knowles (1950) in Knowles, Holton, and Swanson (1998) believed that adults learned best in informal, comfortable, flexible, and non-threatening settings. Proper seating position is essential. The use of headsets and an intercom is now universal. The FAA (1999) suggested that “... three of four repetitions provide the maximum effect, after which the rate of learning and probability of retention fall off rapidly” (p. 115). The researcher believes that this included landing practice. The researcher found that 60 allowing a student three practice landings followed by the instructor demonstrating a landing provided the student an opportunity to relax. Following the demonstration most students could profitably practice three more landings. The researcher found that grinding around the traffic pattern for an hour without a break was counterproductive. The FAA (1999) mentioned fatigue as an obstacle to learning. 61 CHAPTER THREE: RESEARCH METHODS This study focused on what flight instructors should teach to student pilots who have not soloed and on what flight instructors actually teach. What flight instructors should teach was determined by a literature review and by consultation with experts. What flight instructors actually taught was found by the analysis of data obtained from 32 interviews. Engaged Scholarship Van de Ven (2006) suggested that research would be more useful to the degree that the researcher was engaged with the community involved. He defined engaged scholarship as: A participative form of inquiry where researchers involve others and leverage their different perspectives to learn about a problem. A view of how scholars define their relationships with their communities – other academics, practitioners, students. A relationship involving negotiation, mutual respect, and collaboration to produce a learning community. Studying complex problems with and/or for practitioners and other stakeholders – many ways to practice engaged scholarship. Van de Ven also suggested that researchers should “Engage those who experience and know the problem”. This study is an example of engaged scholarship. 62 Insider‟s Perspective The researcher‟s flying and flight instructing experience of 6800 hours and 3800 hours respectively were above the mean and median of participants‟ total flying time and flight instructing experience. As an active member of the flight instructing community, the researcher was able to relate to the participants‟ descriptions of their flight instructing and to formulate additional questions, as necessary, to more completely define participants‟ practices. The researcher was welcomed as a peer and the participants were eager to learn the results of the study. The researcher promised to send each participant a copy of the completed study. Methods Since this study‟s focus was on the specific details of the landing process and on numerical relationships of the variables involved in teaching landings, a quantitative research methodology was used. Both descriptive and correlational research designs were used in answering the research questions. These efforts are described below. Answering the Research Questions Question one was answered by the literature review and by consultation with five experts. Question two was answered by interviewing 32 participating flight instructors and by analyzing the interview results. Descriptive statistics of the variables involved were prepared. Correlation statistics were prepared for relating experience and conformance to a list of things that flight instructors should teach to pilots learning to land. The study‟s statistics are inferential. That is, the statistics infer from the sample studied, the results that would be obtained if the entire population had been studied. 63 Prior to the data analysis, a criterion of significance less than .05 was established as the basis for accepting or rejecting the hypotheses that flight instructors teach more of the items on the list of Appendix A as they gain experience. A significance of .05 indicates that there is a one in twenty chance that the correlation results could have occurred by chance. Data were analyzed to determine differences between less experienced and more experienced flight instructors. Question One. What do experts in the field suggest should be taught to pilots learning to land? This question was addressed during the literature review. Following the literature review the model of the landing process shown in Figure 2 was constructed. The model was then used as a basis for a list (Appendix A) of 37 things that flight instructors should do while teaching pilots to land an airplane. Content applicability. The model and the list of shoulds were evaluated for content applicability by experts in the field of flight instruction. These experts included the director of a university flight program, an owner of a flight school, an FAA inspector, and two senior members of the flight instructing community. The experts had an average of more than 30 years of flight instructing experience. All but one of the five were examiners authorized by the FAA to conduct flight tests and to issue pilot certificates and ratings. Number of experts. Patton (2001) in Gall et al (2002) suggested continuing to select cases until no new information was forthcoming from new cases (referring to qualitative research). The researcher felt that that suggestion could be applied to the 64 expert review process. The expert review process was terminated after five expert interviews since no new information was forthcoming. The experts agreed with approximately 95 % of the original model of the landing process and the list of things that instructors should do (Appendix A). Changes that were made as a result of the interviews related mostly to increasing the emphasis on teaching directional control during the last two phases of the landing process, touchdown and rollout. Weighting the shoulds. Following the interviews, the experts were asked, by means of the letter of Appendix B, to weight the relative importance of the final list of 37 shoulds. Appendix C was prepared from the experts‟ responses. Question Two. What is actually being taught to pilots learning to land? Kepner and Tregoe (1965) suggested that problem solving ought to begin with a determination of the should and the actual. Only then could the dimensions of a problem be determined. The literature review and content validation process described above established the should in answer to research question one. Question two dealt with the actual. Data gathering method. Three means of gathering data were considered: Observation Questionnaire Interview The first method considered was direct observation by means of a portable video camera temporarily mounted in the cockpit and connected to the intercom system. That an observational study would provide more accurate data than would questionnaires or 65 interviews was supported by Good (1959) who stated “In a questionnaire or interview, the respondent may tell what he thinks he does, but human beings are not generally accurate or reliable observers of themselves. Only direct observation of overt behavior can reveal what the subject actually does” (p. 222). Further support was provided by Borg and Gall (1971) who suggested that “people often bias the information they offer about themselves and sometimes cannot accurately recall events and aspects of their behavior in which the researcher is interested” (p. 224). However, this approach was abandoned due to the cost and complexity of adapting the equipment to the different airplanes to be involved in the study. Also, more than one flight would have been required to obtain a complete record of how each instructor taught landings, since all factors might not be present on any one flight. This presented logistical problems beyond the scope of this study. The five experts also discouraged attempting this approach. However, as noted in chapter five, it remains an attractive research method. Questionnaires are advantageous for gathering data economically over a wide geographic area at minimum time and cost (Gall, Gall, & Borg, 2003). However, questionnaires are subject to self-report bias and become tedious to answer when many items are included. Devising a set of closed form questions without giving away the should of the factors investigated would have been extremely difficult. Also, eliciting indepth responses, and allowing for exploration of alternate ways of teaching landings required a more open ended and less structured approach than could readily be achieved through the use of a questionnaire. 66 The method of data gathering chosen was the semi-structured interview. Gall, et al (2003) stated that a semi-structured interview “...involves asking a series of structured questions and then probing more deeply using open form questions” (p. 240). “The researcher initially presents the topic area of the interview to the respondent, then uses probing questions to obtain the desired level of detailed information” (DePoy & Gitlin, 2005). The principal advantage of the interview is its adaptability. Good (1959) stated that a major advantage of the interview process is that “The interviewer may follow up leads and clues in a manner that is not possible by means of an instrument prepared in advance” (p. 208). Gall, et al (2003) stated: The major advantage of interviews is their adaptability. Skilled interviewers can follow up a respondent‟s answers to obtain more information and clarify vague statements. They also can build trust and rapport with the respondents, thus making it possible to obtain information that the individual probably would not reveal by any other data collection method. (p. 222) The researcher found this statement to be true. The researcher prepared a set of interview questions (Appendix D) that included two general questions about teaching landings and 20 open form questions (probes) to be used if the answers to the original two questions lacked depth. The questions were prepared by referring to the model (Figure 1), and the associated list of 37 items that flight instructors should teach (Appendix A). The result was a matrix (Appendix D) showing which of the shoulds of Appendix A each question addressed. All 37 shoulds 67 were covered. The researcher referred to both Appendix A and Appendix D during the interviews. Other questions were used, where appropriate, to explore participants‟ answers in more depth. Interviewing participants. Research question two was answered by interviewing 32 active flight instructors with Minnesota addresses and by analyzing the data collected. An active flight instructor was defined as one who had taught landings during the past year and had also given at least 10 hours of dual instruction during the past year. Fifteen of the interviews were held in 13 cities outside the Minneapolis/Saint Paul metropolitan area. Descriptive statistics were prepared for the distributions of total flight time, total flight instructing time, and the number of shoulds taught. The above hypothesis that flight instructors teach more of the shoulds as they gained experience was tested using statistical correlation methods. The data were also analyzed to determine if there were any relationships between experience and which of the 37 shoulds were taught. Pilot study. Pilot studies are recommended for evaluating procedures, methods and materials (Leong & Austin, 2006). Prior to selecting and interviewing participants, a pilot study was performed to validate the use of interviews as a means of determining what flight instructors taught, related to the 37 shoulds of Appendix B. Two flight instructors, one experienced and one inexperienced were interviewed by the researcher. The interviews were transcribed and were evaluated by the researcher and by two other experienced flight instructors. A 70 % agreement between observers constitutes acceptable inter-observer reliability (Borg & Gall, 1971; Leong & Austin, 2006). The results of the evaluation showed an average agreement of 78% regarding the number of 68 shoulds taught and an average agreement of 73% regarding the teaching of individual shoulds. The detailed results of the pilot study are contained in Appendix E. Population. The study population was all active flight instructors with a Minnesota address who held certificates allowing them to teach in single engine land aircraft. Activity was defined as having taught landings within the past year and having given ten or more hours of flight instruction during the past year. There were 2228 flight instructors and 1436 student pilots in Minnesota in December of 2005 according to the Minnesota Department of Transportation (MNDOT), based on FAA data. A list of all Minnesota flight instructors including address, type of pilot certificate, type of flight instructor certificate, and level of medical certificate was obtained from Landings.com (2006). That data base was last updated in August of 2006 from the FAA pilot certificate data base. An examination of the first 600 listings found 21 instructors (3.5%) certificated for balloons, gliders, or rotorcraft only. Thus, the population of interest was 96.5 % of the 2364 names in the data base or 2281 instructors. The fact that instructors outnumbered students might indicate that many instructors are inactive. Instructors must be recertified every two years. Instructors may obtain recertification by maintaining a satisfactory level of activity. They can also maintain their certificate by authorization from an FAA inspector, by attendance at a Flight Instructor Refresher Clinic (FIRC), or by completion of an on-line course. Thus flight instructors may remain in the data base without teaching. It is also possible that some student pilots were inactive since a student pilot certificate is valid for two years. 69 Participant solicitation. The names on the list of flight instructors were numbered from one to 2364 consecutively. A random sequence of 2364 numbers was obtained from Random.org (2006). The first 300 single engine land instructors in the random sequence were sent the solicitation letter of Appendix F and a return postcard, Appendix G. Three weeks after sending the letter, a second letter, Appendix G, and another postcard were sent to those who had not responded. 145 postcards were returned, a rate of 48%. 65 of the 145 were active and 52 of the 65 active flight instructors agreed to an interview. No letters were returned as undeliverable. Interviews. “Generally in correlational research it is desirable to have a minimum of 30 cases” (Borg & Gall, 1971, p. 123). The researcher interviewed 32 of the 52 active flight instructors who agreed to participate. The interviews (and the interviews of the five experts and the two pilot study participants) were recorded using an Olympus digital recorder. The interviews of the experts and the pilot study participants were transcribed using Olympus DSS Player Software version 3.4. The researcher marked a copy of Appendix A immediately after each of the 32 participant interviews and did not need to refer to the recording. Prior to asking the questions of Appendix D, the researcher explained the purpose of the study. Following a general explanation of the study, each participant was given a copy of a consent form to sign (Appendix H) and a copy to keep. The University of Minnesota Institution Review Board (IRB) informed consent procedures were followed. 70 CHAPTER FOUR: DATA ANALYSIS Response to Mailings Flight instructing is often the first step in a pilot‟s career as an aviation professional. It is a low-paying job and is a means of gaining flying experience until accumulating the flying time necessary to qualify as a corporate or airline pilot. Pilots moving up the ranks of professional fliers may stop instructing once they obtain a better paying job. Others, such as several of the researcher‟s acquaintances, may stop instructing after a time and go on to other pursuits while maintaining their certification by attendance at a Flight Instructor Refresher Clinic (FIRC), in the event that they would choose to become active again. Thus, it was not surprising that 80 of the 145 respondents (55%) were inactive. The data base of Minnesota flight instructors downloaded from Landings.com was examined in an attempt to determine if non-respondents held higher class medical or pilot certificates than did respondents, possibly indicating employment by airlines or corporations and that they were no longer instructing. Sixty one percent of the respondents held a first class medical certificate compared with sixty six percent of the non-respondents. Forty one percent of the respondents held air transport pilot certificates compared with 40% of the non-respondents. Thirty one percent of the respondents held both a first class medical certificate and an air transport pilot certificate while 34 % of the non-respondents held both. Thus, there were no significant differences among these two sub-populations. 71 Participants‟ Data Distributions A spread sheet (Appendix I) was prepared, collecting the data from the postcards and interviews. Appendix I was the data base used for all statistical procedures. SPSS Graduate Pack 12.0 was used for this study. Total Flight Time The distribution of total flight time of the 32 participants is shown in Figure 3. The difference between the mean and the median was consistent with the skew to the left shown. Two modes are apparent. Flight times less than 8000 hours and flight times of more than 11,000 hours. The higher mode likely included only airline or corporate pilots. The lower mode included most of the participants and also included less experienced airline or corporate pilots. Figure 3. Distribution of participants‟ total flying times. 72 Total Instructing Time Figure four shows the distribution of the instructing time of the 32 participants. This distribution was also skewed to the left. This might indicate that flight instructors seldom make a career of teaching flying and therefore, there are few instructors with large amounts of instructing experience. Figure 4. Distribution of participants‟ flight instructing times Number of Shoulds Taught Figure 5 shows the distribution of the number of shoulds taught by the participants. The distribution is normal. The mean and median were 27 shoulds. The standard deviation was 3.9 shoulds. The spread was from 19 to 35. Inspection of the third and fourth columns of Appendix I, percentage of shoulds taught and percentage of 73 weighted shoulds taught, showed that they are very close together. Thus, the experts‟ weighting of the shoulds did not affect the distribution significantly. Operational Significance A major finding of this study was that Minnesota flight instructors taught an average of only 27 of 37 things that a flight instructor should teach to pilots learning to land. There is clearly room for improvement. Figure 5. Distribution of the number of shoulds taught by participants Correlation of Experience and the Number of Shoulds Taught The hypothesis stated in the Research section of Chapter One: Flight instructors teach more closely to the model as their flight instructing experience increases, was tested 74 by correlating the number of shoulds taught with instructing time and also by correlating the number of shoulds taught with total flight time. Relationship between the Number of Shoulds Taught and instructing experience Figure 6 shows the correlation of the number of shoulds taught with flight instructing time. Table 1 shows the regression statistics associated with this correlation. Linear regression is a means of establishing a straight line that shows a linear relationship between two variables. The least squares regression used for this study minimizes the sum of the squares of the distances of each data point from the regression line. Inspection of Figure 6 shows no evidence of correlation between the two variables. The regression line is almost flat; indicating that the number of shoulds taught by a flight instructor cannot be predicted from the flight instructor‟s instructing experience. This was the second major finding of this study. 75 Figure 6. Correlation of the number of shoulds taught and instructing experience Table 1. Regression statistics for number of shoulds taught and instructing experience. Model Summary Model 1 R R Square Adjusted R Square Std. Error of the Estimate .038(a) .001 -.032 3.920 a Predictors: (Constant), Dual Given Coefficients(a) Unstandardized Coefficients Standardized Coefficients Beta Model 1 B t Std. Error (Constant) 26.489 .859 Dual Given .000 .000 a Dependent Variable: Raw Score 76 Sig. 30.831 .000 .038 .207 .838 Relationship Between the Number of Shoulds Taught and Total Flight Time Figure 7 shows the correlation of the number of shoulds taught with total flight time. Table 2 shows the regression statistics. Figure 7 shows a positive correlation with a Pearson Coefficient (r) of .253. The r value is not a hard and fast measure but is subject to interpretation. Borg and Gall (1971) considered an r value of from .25 to .35 to indicate a very slight relationship. Values around .5 allow crude group predictions and values from .65 to .85 allow group predictions that are accurate for most purposes. Best (1977, p. 260) presented the following table as crude criteria: r Relationship .00 to .20 negligible .20 to .40 low .40 to .60 moderate .60 to .80 substantial .80 to 1.00 high to very high Royeen (1989, p. 104) stated that r values are robust when sample sizes are greater than 25 to 30, as was the case for this study. Royeen also stated that three assumptions underlie the Pearson statistic. These include normality of the underlying distribution, a linear relationship between the two variables, and interval or ratio data. For this study, the distribution of the number of shoulds taught was normal but the 77 distributions of the experience variables were not. The relationship between the number of shoulds taught and experience was linear and the data were interval data. The value of r2 of .064 indicates that 6.4% of the variation of the number of shoulds taught can be explained by the total flight time variable. However, the significance factor (p) of .163 is much larger than the .05 usually considered adequate for acceptance of the results of statistical analysis of a sample (Creative Research Systems, 2007). That is, when p = .05 there is only a one in twenty probability of the regression result occurring by chance (DePoy & Gitlin, 2005). The p value of .163 is reason enough to reject the finding of a positive relationship between the two variables. Even if p was .05 or lower, the relationship would be weak. The third major finding of this study was that the hypothesis of a positive relationship between conformance to the model of Figure 2 and experience was rejected. That is, there is no statistically significant relationship between either total flying experience or total flight instructing experience and the number of shoulds taught by the population of the study. 78 Figure 7. Correlation of the number of shoulds taught and total flight time Table 2. Regression statistics for number of shoulds taught and total flight time. Model Summary Model 1 R R Square Adjusted R Square Std. Error of the Estimate .253(a) .064 .033 3.796 a Predictors: (Constant), Total Time Coefficients(a) Unstandardized Coefficients Standardized Coefficients Beta Model 1 B t Std. Error (Constant) 25.723 .906 Total Time .000 .000 a Dependent Variable: Raw Score 79 Sig. 28.379 .000 .253 1.430 .163 Frequencies of the shoulds Taught Table 3 shows how many of the participants taught each of the 37 shoulds. No participant taught all of the shoulds, nor was any should taught by all participants. Six shoulds were taught by all but two of the participants. These shoulds are shown in the first six rows of table 3. Of interest, is the fact that all six of these shoulds received the highest weighting by the experts, 4.8, and that all six are related to maintaining directional control, particularly during the latter phases of the landing process. During the interviews, the experts emphasized the importance of teaching these items. It appears that the flight instructing community concurs. Table 3. Should frequencies Should Number Abbreviated Should 10 13 20 21 28 29 30 1 Maintain centerline alignment Compensate for wind drift Maintain runway alignment after level-off Compensate for wind drift after level-off Maintain centerline alignment after rollout Compensate for wind drift during rollout Avoid braking until the airplane has slowed Be certain that pilots are able to fly ... before ... landing practice Recognize wind drift Instruction in going around Power-on approaches Remove power after beginning level-off Increase back pressure to maintain touchdown attitude Go-around Do not lower the nose during touchdown Stabilized approach Use trim Use VASI 80 12 32 5 19 23 35 25 2 9 16 Number of Times Taught 30 30 30 30 30 30 29 29 Experts‟ weighting 29 29 28 27 27 27 26 25 24 24 4.6 4.0 3.6 3.4 4.4 4.6 4.6 4.4 4.4 3.0 4.8 4.8 4.8 4.8 4.8 4.8 3.8 3.8 24 3 4 11 31 37 14 17 22 26 7 15 36 18 27 33 8 6 34 Touch down at slowest possible speed Use full flaps Apply Final flap setting as part of stabilized approach Use windsock Look for traffic Physiological/psychological factors Low passes Safe landing distance limit Specific touchdown nose attitude Don‟t lower nose during touchdown process Add half the gust velocity Establish desired flare point Divide attention ... inside ... outside Look down the runway Land near a desired point Cease pattern work when progress is not being made Determine need for outside pattern work Approach at 1.3Vso Provide breaks 23 21 19 19 19 19 16 16 16 16 15 15 15 13 13 13 11 8 8 4.0 3.4 4.0 4.2 4.6 4.2 3.4 4.8 3.4 4.0 4.2 3.4 4.4 3,8 3.8 4.2 4.4 4.4 3.8 Comparison of shoulds Taught With Instructing Experience In order to determine if more experienced instructors taught different shoulds than did less experienced instructors, the shoulds taught by the ten most experienced instructors were compared with the shoulds taught by the ten least experienced instructors. The results of the comparison are shown in Table 4. Of the 37 shoulds, 11 of them were taught by the same number of instructors in each group. The number of instructors teaching each of 12 other shoulds was one greater in one of the groups than in the other group and the number teaching each of 11 of the remaining shoulds differed by two between the two groups. Of interest was that two of the shoulds were each taught by four or more instructors in one group than in the other group. Should 4, applying the final flap setting as part of the stabilized approach, was taught by all of the ten most experienced 81 instructors and by six of the ten least experienced instructors. Perhaps more experienced instructors discovered that the advantages of full-flap landings outweighed their disadvantages. Should 37, cognizance of physiological and psychological factors, was evidenced by all of the most experienced instructors and was evidenced by four of the ten least experienced instructors during the interviews. Since these factors are more related to teaching in general than to the specifics of teaching landings, perhaps flight instructors become better teachers as they gain instructing experience. The researcher‟s experience during attendance at many FIRCs is that the theory and practice of teaching is generally presented while the details of teaching specific piloting tasks are not. Thus, flight instructors might improve their teaching skills over time but not the specifics of teaching landings. Table 4. Comparison of shoulds taught. Number of shoulds *Difference Between Groups 11 0 12 1 11 2 1 3 1 4 1 6 * The difference in the number of instructors of each group that taught the should(s). 82 Other Observations This section includes some non-statistical observations related to some of the shoulds based on the responses of the participants to the interview questions. The interviews were rich in detail not necessarily related to the research questions of this study but possibly of interest to the flying community. Rather than ignore such data, it is presented here in the hope that flight instructors and their students will find it useful. 1. Be Certain That Pilots Are Able to Fly All Parts of the Pattern, Except the Flare and Landing, Before Beginning Serious Landing Practice. Most instructors, when asked for details, stated that they taught pilots to master the slow flight, glides, and other tasks associated with the traffic pattern. A few instructors stated that they had pilots stitch those tasks together into a simulated traffic pattern at altitude to assure that pilots had mastered the required sequence of tasks. A few instructors noted that they related individual tasks to their future use in the traffic pattern, when these tasks were initially introduced. This is consistent with the FAA‟s current recommendation for scenario based training. Several instructors agreed that the worst place to teach the landing traffic pattern was in the pattern. Pilots became too focused on the landing itself and not enough on flying a proper traffic pattern to get to the landing. Traffic pattern practice away from the airport, followed by low passes, allowed pilots to concentrate on the other important factors rather than on the landing itself. 83 2. Flight Instructors Should Teach Pilots to Stabilize the Approach Soon After Turning Onto the Final Approach Course, or by an altitude of 400 Feet, or at About a half-mile From the End of the Runway, Depending on the Traffic Pattern Flown. A few instructors who stated that they taught pilots to stabilize the approach early, also stated that they taught pilots to delay the final flap setting until later in the approach. A few instructors taught an airspeed reduction near the runway threshold. Such procedures increase a pilot‟s workload and destabilize the approach. 3. Flight Instructors Should Teach Students to Use Full Flaps Most instructors taught the use of full flaps as the normal final approach configuration. A few instructors mentioned that while they taught the use of full flaps as the normal final approach configuration, they also taught students to land with any flap setting from zero to full. Most instructors taught students to use less than full flaps during gusty wind conditions. One instructor taught students to use no flaps or only the first increment of flaps because landing that way was more difficult and the student would, of necessity, become more skillful. 6. Flight Instructors Should Teach Pilots to Approach at an Airspeed of 1.3 Vso. Only a few instructors stated that they taught pilots to approach at 1.3 Vso. Those that did often stated that they used the POH recommended values, as did most of the other participants. However, POHs typically recommend a range of airspeeds of from 1.3 to 1.5 Vso. Thus, most instructors teach pilots to establish 1.4 Vso as the target final approach speed. No instructor taught students to calculate Vso based on the actual gross weight of the airplane. Many trainers are flown at less than their maximum allowable 84 gross weight. A commonly used rule of thumb states that Vso decreases by one-half of the percentage difference between maximum allowable and actual gross weights. 7. Flight Instructors Should Teach Pilots to Add Half the Gust Velocity to the Final Approach Speed. Most instructors taught pilots to add half the gust velocity increment to the final approach speed. A few instructors stated that they added five knots in gusty conditions and if that was insufficient, student pilots should not fly. 8. Flight Instructors Should Determine When Additional Airwork Outside the Traffic Pattern is Needed to Improve Basic Flying Skills. Most instructors, when asked about what they do when pilots have reached a learning plateau and their landings do not improve, or even deteriorate, stated that they ask another instructor to fly with the student for evaluation. A few stated that they stop traffic pattern work and practice airwork and that the landing difficulties can usually be related to the lack of basic flying skills. The most often mentioned deficiency was the inability to establish and maintain a stable approach glide. 13. Flight Instructors Should Teach Pilots to Compensate for Wind Drift Most instructors stated that they taught pilots to use the crab method to compensate for crosswinds during the initial part of the final approach. They then had the pilots transition to the sideslip method before reaching the runway threshold. A few instructors stated that they taught student pilots to begin the sideslip as soon as the airplane was turned onto the final approach, even though it was more difficult to maintain runway alignment with that technique, especially if the crosswind was stronger at 85 altitude. They explained that student pilots needed more sideslip practice before they became proficient at switching from a crab to a sideslip during the last moments of the approach. Most instructors agreed, however, that once a pilot gained crosswind proficiency, and maintained it through practice, that the last instant switch from a crab to a sideslip was an easier procedure. 14. Flight Instructors Should Teach Pilots to Make Low Passes over the Runway to Practice Centerline Alignment at Slow-Flight Speeds Prior to Their First Attempts at Landing. Several instructors used the low pass technique before teaching students to touch down. Several others used low passes as a remedial measure for students having trouble maintaining centerline alignment during crosswind conditions. Both groups stated that this method worked well. 15. Flight Instructors Should Teach Pilots a Technique for Establishing the Desired Flare Point About half the instructors did not teach pilots to use a specific technique to assure that the level-off would occur at the desired flare point. They stated that pilots learned where the level–off would occur through practice and through subconscious memorization of the associated visual cues. The other instructors taught the stationary spot technique. 86 16. Instructors Should Teach Pilots to Use Visual Approach Slope Indicators, if They are Present Most instructors taught pilots how to use any visual approach slope indicators that might be present. Several instructors noted that they taught students that the three degree glide slope of such indicators was shallower than the approach generally flown by light trainers. They also pointed out that the flare point of such indicators was usually farther down the runway than the flare point normally taught, usually closer to the runway threshold. They taught pilots how to use the approach slope indicators as a guide, even when flying a steeper approach. A few instructors taught pilots to fly a three degree glide slope when such indicators were present and a steeper approach otherwise. A few instructors taught pilots to always fly a three degree glide slope. 17. Establish a Safe Landing Distance Limit Beyond Which a Go-Around Should be Performed. Many instructors did not establish a safe landing distance limit. Those that did, most often stated that they taught pilots to go-around if the touchdown would not occur in the first third of the runway. A few instructors noted that the first third might be marginal when landing on a short runway and too conservative when landing on a long runway. Only one instructor established a limit defined by actual length, 1000 feet. A few instructors noted that they taught only full-stop landings and that they allowed pilots to land farther down the runway than if they were to perform touch-and-goes or stop-andgoes. 87 18. Instructors Should Teach Pilots to Look Down the Runway When Nearing the LevelOff Point Instructors who taught pilots to shift their vision down the runway when nearing the level-off point, most often just before crossing the runway threshold, stated that that technique was of significant value in helping pilots pick up the visual cues associated with nearing the ground. Looking over the nose at the flare point resulted in a late, abrupt level-off usually accompanied by ballooning. Other instructors stated that they coached pilots when to level off and that with practice, pilots would subconsciously learn the associated visual cues. A few instructors taught pilots to look down the runway just as the level-off began. The resultant visual cues were perceived too late to be of value in determining when to level off, Instructors who taught pilots to shift their vision down the runway used varying distances. Several taught pilots to look at the far end of the runway. A few taught pilots to look halfway down the runway and one instructor taught pilots to look at the far horizon. 20,21,28,29 Maintaining Runway Alignment and Compensating for Wind Drift during Level-Off and Rollout All instructors stated that they emphasized the need to continue to fly the airplane until it was stopped. All instructors were aware of accidents caused by lack of attention after touchdown. Several instructors stated that some pilots tended to relax and lose concentration after touchdown. The instructors clearly emphasized the need for continued concentration after landing as did the five experts who were interviewed to validate the landing process model. 88 22. Flight Instructors Should Teach Pilots to Raise the Nose to a Specific Touchdown Attitude Following the Level-Off. Almost half of the instructors did not state a specific nose attitude that they taught pilots to achieve after leveling off. They stated that they taught pilots to raise the nose so that the main wheels would touch down before the nosewheel, thus absorbing most of the landing shock, but did not establish a specific nose position or nose attitude limits. The after level-off nose position taught by the other instructors varied from just above level flight to holding the top of the engine cowling on the horizon. 26. Instructors Should Teach Pilots Not to Lower the Nose During the Touchdown Process Instructors who stated that they taught pilots not to lower the nose once the flare process had begun, stated that lowering the nose due to impatience and believing that lowering the nose would facilitate the landing, usually resulted in a bounce and often began an oscillation called crow hopping. Other instructors allowed pilots to lower the nose if they leveled off too high. The first group stated that they taught pilots to goaround in the event of a high level-off. A few instructors allowed pilots to stop raising the nose momentarily if the level-off appeared to be high but within safe limits. 27. Flight Instructors Should Teach Pilots to Land Near a desired Touchdown Point. Flight instructors who taught pilots the stationary spot technique stated that the landing would occur a predictable distance beyond the flare point (aim point). Thus, each landing could be considered an accuracy landing. Most other instructors did not teach a specific touchdown point but stated that with practice, landings tended to occur at the 89 same point. Instructors who taught the stationary spot technique stated that the technique worked for any runway, at any airport, and during the day or night. 33. Flight Instructors Should Cease Pattern Work When Progress is Not Being Made and Should Leave the Pattern to Work on Airwork, Ground Reference Maneuvers, or Whatever is the Root Cause of the Difficulty See 8. above. 34. Flight Instructors Should Provide Breaks to Avoid Fatigue. Only eight instructors routinely provided breaks to avoid fatigue during concentrated landing practice. Most instructors stated that their students did not become fatigued during a training session of about an hour. A few instructors stated that one of the reasons that they teach pilots to make full stop landings rather than touch-and-goes is that the process of taxiing back for another takeoff is relaxing for the student, avoids fatigue, and gives the instructor an opportunity to critique the last landing. A few instructors mentioned that they ended the session if they saw signs of fatigue. 37. Flight Instructors Should be Cognizant of the Psychological and Physiological Factors Involved and Should be Able to Deal With Them as Required To the researcher‟s knowledge, few, if any, of the participants were trained as teachers. Therefore it was not surprising that no one spoke of educational constructs such as learning domains, learning and teaching styles, learning motivation, and so on. Some participants did, however, mention factors that they considered during the course of a lesson. A pilot‟s state of mind and general physical condition were the factors most often mentioned. Consideration of fatigue was sometimes mentioned but only after probing by 90 the researcher. A few instructors mentioned seating position. No one mentioned an optimum number of practice repetitions of a task of maneuver. 91 CHAPTER FIVE: SUMMARY, IMPLICATIONS AND RECOMMENDATIONS Summary of the Results of the Study The study answered two research questions: 1. What do experts in the field suggest should be taught to pilots who are learning to land? 2. What is actually being taught to pilots learning to land? The answer to research question one was a model of the landing process and a list of things that flight instructors should teach. The model and the list were evaluated by a group of experts. The answer to research question two included the findings that: Flight instructors teach an average of 27 of the 37 things that should be taught to pilots learning to land. There is no relationship between experience, either total flight time or total instructing time, and what flight instructors teach. The hypothesis that flight instructors teach more closely to the model as their flight instructing experience increases was rejected. More experienced flight instructors are more likely to teach full-flap approaches than are less experienced flight instructors. More experienced flight instructors are more likely to be cognizant of the physiological and psychological factors involved in teaching landings than are less experienced instructors. Implications Two Approaches to Flight Instructing 92 There appeared to be two approaches to flight instructing among the participants: Allowing students to learn by trial and error while coaching in general terms such as too high an approach or too flat a touchdown. Providing students with detailed cues, such as specific visual references, as much as is practicable. Students taught with either approach have learned to fly. The differences might be reflected in the habit patterns developed and in the efficiency of the flight instructing process. The Wright brothers learned by trial and error, albeit with knowledge gained from pioneers such as Lileanthal, Chanute, and Langley. However, the Wrights‟ experience was risky, costly, and time consuming. Trial and Error Allowing students to learn mostly by trial and error runs the risk of creating poor first impressions of a task in the mind of the student. The law of primacy was defined by the FAA (1977) as: Primacy, the state of being first, often creates a strong, almost unshakable, impression. For the instructor, this means that what is taught must be right the first time. For the student, it means that learning must be right. “Unteaching” is more difficult than teaching. If, for example, a student maintenance technician learns a faulty riveting technique, the instructor will have a difficult task in unteaching the bad habits and reteaching the correct ones. Every student should be started right. The first experience should be positive and functional and lay the foundation for all that is to follow. (p. 4) 93 To the extent that students learn by trial and error, they are much less likely to have a positive first landing experience and are less likely to develop landing habits that will serve them well in their future flying. Detailed Cues Providing detailed cues, such as a specific nose attitude for touchdown, and assisting the student to make every one of the first practice landings correctly, provides the student with an initial picture of what a good landing should look like. A few other landing cues are discussed below. Level-off. In the researcher‟s experience, the most important element of a proper level-off is looking down the runway before beginning the procedure. Twenty participants did not teach pilots to do that. Stationary spot. If instructors teach their students to use the stationary spot technique to determine the flare point (and ultimately the touchdown point) every landing will be a precision landing. There will be no need to add other procedures for teaching accuracy landings (assuming that the instructor is also teaching the routine use of full flaps and an approach speed of 1.3 Vso). Seventeen participants did not teach pilots to use specific cues to determine the flare point. Touchdown nose attitude. Providing pilots with a specific nose attitude to be attained and maintained during the touchdown phase minimizes pilot induced oscillations and helps assure a touchdown at minimum speed on the main landing gear. Sixteen participants did not teach a specific nose attitude to be held. 94 The above examples represent situations where specific visual cues aid pilots to learn tasks quickly and correctly and minimize the necessity for long periods of trial and error practice. The researcher believes that teaching the 37 shoulds defined by this study, will provide pilots with specific references that help them learn to land without the need for grinding around the traffic pattern, hour after hour, as is all too commonly seen. Assisting students to make all of their initial landing attempts successfully will imprint the image of a good landing in their memory and will serve them well in moments of stress, according to the law of primacy. Benefits of the Study Flight Schools, Flight Instructors and Student Pilots The immediate beneficiaries of this study are flight schools, flight instructors and student pilots. Flight instructors might use the model to help improve their teaching and as a resource for ground instruction. Student pilots might find the material helpful in understanding the complex process of landing an airplane. Hopefully, others will continue this kind of research and will publish the results. In the long run, this kind of research could lead to standardization of teaching landings as noted below. Standardization of Instruction Discovery of common factors used, or those not used, by flight instructors could help lead to standardization of landing training. The military and the airlines have found standardization to be an effective training methodology. Benkert (n.d.) stated that “standardization in civilian flight training is something long prayed for, but remains elusive. The military has practiced it for years and years ....but since the F.A.A. knows all 95 and will not consult with the military, no knowledge has been shared.” Benkert‟s criticism of the FAA might be considered a bit harsh. The FAA explained the landing process rather thoroughly in the Flight Training Handbook (1980). The FAA also established standards for acceptable landings in the Practical Test Standards for various certificates and ratings. The FAA has prepared video tapes called On Landings (1995) that deal with the factors involved in landing a light airplane under all conditions. However, Benkert is justified to the extent that the FAA has not advised flight instructors, in detail, how to go about teaching the factors involved in the landing process discussed in the FAA‟s Airplane Flying Handbook and in On Landings. As a result, individual instructors are left to develop their own teaching methods. Individuals teaching at large flight schools or colleges might be more likely to be subject to standard procedures. Unfortunately, results have not been published and consequently there is a lack of a body of detailed, flight training practices, based on research, to which new instructors can refer for guidance. The FAA Practical Test Standard for the flight instructor practical flight test contains tasks that mostly require the applicant to demonstrate flying skills. Before taking the flight test, applicants are required to pass a written examination called Fundamentals of Instruction (FOI) that deals with teaching and learning theory in the cognitive, psychomotor, and affective domains. This knowledge and the applicant‟s teaching skills are examined during the oral examination that precedes the flight test and during the flight test itself. However, given the amount of material to be covered, such evaluation is 96 minimal. Thus, a new flight instructor is certificated with only minimal knowledge of how to teach and how to determine the factors involved in teaching each flight task. Although there are a number of popular books such as Kershner‟s The Flight Instructor‟s Manual (1981) and Langewiesche‟s classic Stick and Rudder (1944) that contain suggestions for teaching pilots how to land, The researcher has found that detailed how to practices for flight instructors do not cover all the factors believed involved. It is not known to what extent flight instructors make use of Kershner‟s, and others‟ suggestions and whether or not instructors address the factors discussed in the FAA material, as well as the level of detail that flight instructors reach in their teaching. This study was an attempt to illuminate how flight instructors teach pilots to land. It is hoped that the study will provide useful suggestions for the flight instructor community. Flight Instructor Continuing Education The fact that experience does not affect what flight instructors teach might imply that flight instructors do not continue to learn more effective teaching strategies. Rusty Sachs, the executive director of the National Association of Flight Instructors (NAFI), (2007) stated: ... we don‟t train flight instructors appropriately. We don‟t train them enough, and we act surprised when these shortcomings lead to less qualified pilots. Part of the problem lies in the structure of general aviation, where we place flight instructor jobs at the entry level of the career pipeline. It‟s not quite the blind leading the blind, but it is close. (p.2) 97 Several of the study participants volunteered that they instructed the way they were taught. Thus, lack of knowledge of effective teaching strategies (the 37 shoulds of this study) might be compounded by a lack of continuing education. Instructors have other opportunities beside FIRCs to learn effective teaching strategies. Aviation seminars are provided by both government and private agencies that often include flight instructing material. The internet contains a wealth of information that is useful to flight instructors. The flight training publications of the AOPA and NAFI deal with teaching flying at the level of detail of the 37 shoulds. The Minnesota Association of Professional Flight Instructors meets quarterly. These are examples of some of the resources available to flight instructors. The study did not attempt to determine the extent to which participants used these or other resources for continuing their education. Limitations Population This study is valid only for the active flight instructor community in Minnesota. Generalization to the entire United States is problematical. Minnesota‟s climate, geography, economy, population, regulatory environment, and demographic factors might cause flight instructors to teach somewhat differently than their counterparts in other states. Method Obtaining quantitative data by interviewing is subject to the skill, bias, and experience of the interviewer. Although the researcher was always conscious of the need 98 to avoid leading the participant and the need to avoid influencing the answers to the general and probing questions, it is possible that these efforts were not always successful. It is possible that other investigators might have elicited different responses. Activity This study interviewed pilots that had taught landings and had given at least ten hours of dual instruction during the past year. It is possible that other criteria such as the number of hours of pre-solo instruction given during the past year, or the number of student pilots soloed in a given time period, might have resulted in different conclusions. Recommendations Publication The researcher found that the things that should be taught to pilots learning to land are known but are scattered among many sources. Some of the participants of this study did not teach particular shoulds because they were unaware of their existence and benefits. The collection of this study‟s shoulds ought to be published as an article, series of articles, or as a pamphlet. This study dealt with the what of teaching landings to pre-solo student pilots, not with the how. Dissemination of this information might be coupled with how to teach as well as what to teach. For example, there are several ways of teaching low passes. The instructor might have the student handle only one control at a time, concentrating on only one facet of directional control. Or, the instructor might control the throttle, allowing the student to control the rudder, ailerons, and elevator. Another example, related to assuring that pilots are ready to learn to land before concentrated landing practice, is to use 99 scenario based training during the first hours of airwork. The tasks assigned should be the bits and pieces of the traffic pattern that will be flown during landing practice. Each of the 37 shoulds could thus be amplified by providing instructors and pilots with a complete discussion of the topic. As mentioned above, the impetus for this study was the researcher‟s experience in soloing about 75 cadets at CAP Flight Academies since 1969. These activities lasted nine dayx. Considerable pressure was felt by all involved to solo as many cadets as possible in the allotted time. Of necessity, efficient practices were developed that allowed almost all cadets to safely solo in the time available, usually with 10 to 15 hours of dual instruction and with relatively few practice landings. That experience was the genesis of the idea that a list of shoulds could be prepared that would define an efficient landing instruction process. The lessons learned from that experience have been collected in an illustrated 27 page training guide, prepared by the Flight Academy staff that embodies and amplifies many of the shoulds of this study. It is worthy of wider distribution and would be of significant value to beginning flight instructors and their students. Research Continuing Education Publications will do little to inform the flight instructing community if the publications are not read. Research is needed to determine how flight instructors keep up with developments in the field. Perhaps many are not motivated to learn more about teaching students to learn most effectively, or better ways of teaching specific tasks such as landings. Since many pilots are teaching only because it is a rite of passage to a higher 100 paying job, they might not be motivated to improve. Canada has higher levels of flight instructor certification that require additional experience and training for advancement. Evaluation This study did not attempt to evaluate the quality of flight instruction. It would be of interest to know if teaching all the shoulds resulted in a more efficient process and if pilots taught that way had fewer incidents and accidents than pilots taught differently. Such research might be accomplished at a large flight training institution. Other factors, outside the instructional process, such as lesson frequency, affect the efficiency of flight training. Large flight training organizations might be able to control for those factors. Outcomes such as safety records of pilot trained in different ways, instruction times required to solo or to achieve a certificate might be used as measures of the process. If such evaluations were possible, it would be interesting to compare the Canadian system of flight instructor certification with the Unites States system. Data Collection The limitations of the interview process could be overcome by video recording as mentioned in the Methods section of chapter three. A large flight training organization could instrument some or all of its training airplanes, eliminating the need for equipment portability, and would probably have enough activity to accumulate an adequate amount of data for comparison with the results of this study. In 2003 the researcher sat in the rear seat of four-place airplanes while 14 different instructors taught pre-solo students to fly. Notes were taken and it was found that a wealth of data related to the research questions of this study could be accumulated. 101 It was sensed, in 2003, that the student and instructor became oblivious to the researcher‟s presence since the researcher remained silent and only watched, listened, and took notes. Bales, in Mouly (1978), reported that people get used to the presence of the observer and that serious distortion does not occur. However, the airplane would handle a bit differently with the added weight of the observer. Rear seat observation is often used for various purposes when four-place airplanes are used for training. Large flight training organizations might find this method useful for comparing their training practices with the shoulds of this study. Population This study sampled active flight instructors. It did not attempt to stratify the data by the amount of instructing activity. It would be of interest to compare the teaching of more active flight instructors with that of less active flight instructors. The differentiating criterion might be the hours of dual instruction given per year. It would also be of interest to determine how much student instruction is provided by the large flight schools in Minnesota and how much is provided elsewhere. Instructors from both groups could be sampled as was done for this study. Other Piloting Tasks In a sense, this study involved finding best practices for teaching pilots to land and determining to what extent those practices were being taught. Other tasks such as navigation, collision avoidance, reacting to emergencies, maximum performance maneuvers, and radio procedures might benefit from an approach similar to the one used 102 for this study. That is, developing and validating a model and gathering data regarding instructing practices. It is possible that some grounded theory (“... deriving constructs and laws from the immediate data that one has collected rather than from prior research and theory” [Gall et al, 2003, p. 8]). could emerge from studies of this nature. Swanson and Holden (1997) stated that “HRD scholars should be respectful of the fact that theory often has to catch up to sound practice in that practitioners can be ahead of researchers” (p. 12). This might be true of flight instruction. In the researcher‟s experience, some flight instruction techniques are passed by word-of-mouth during seminars and during hangar flying, (informal conversations whenever flight instructors meet). For example, the very useful technique of teaching students to use a grease spot on the windshield as a pitch attitude reference is widely used but the researcher has not found reference to this in the literature. Teaching the use of a windshield spot is an example of an approach to flight instructing that provides pilots with as many detailed cues as is possible, rather than allowing pilots to learn by trial and error, while practicing the same mistakes repeatedly. Visual Cues. According to the FAA (1999) 75% of learning occurs through sight. This theory might be supported by hypothesizing that pilots learn best when taught visual cues specific to piloting tasks, rather than learning by repeated practice alone. The 37 shoulds of this study encompass many visual cues such as the stationary spot, looking down the runway, visualizing the extended centerline, windsock, and others. Examples of other visual cues include a windshield spot for pitch reference, section lines and sun position 103 for navigation, the use of the wingtips as pitch and roll references, pitch attitude in relation to airspeed, smoke and waves to indicate wind direction, and many others. Researching, collecting, and publishing the visual cues found useful to the process of flight instruction would be of benefit to the flight instructing community. Journal The field of flight instruction research would benefit from the existence of a peer reviewed journal. Currently, pertinent research articles are few in number, are scattered among journals for other fields, and are difficult to find. Given the number of aerospace education departments at major universities there would probably be enough papers submitted to support at least a quarterly publication schedule. The existence of a journal might also act to stimulate more research in this field. 104 References Aeronautical Information Manual (2005). In FAR/AIM 2005, (pp.471-970). Newcastle, WA: Aviation Supplies and Academics. AOPA (2004, July). FAA certificated pilots by state and certificate type. 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Flight Training, 2006, 71-74. 111 APPENDIX A List of Shoulds Flight Instructors should: Stabilized approach 1. be certain that pilots are able to fly all parts of the traffic pattern, except the flare and landing, before beginning serious landing practice. 2. teach pilots to stabilize the approach soon after turning onto the final approach course, or by an altitude about 400 feet, or at about a half mile from the end of the runway; depending on the traffic pattern flown. 3. teach pre-solo pilots to use full flaps. 4. teach pilots to apply the final flap setting as part of the stabilized approach. 5. teach pilots to make power-on approaches. 6. teach pilots to approach at an airspeed of 1.3 Vso. 7. teach pilots to add half the wind gust velocity to the final approach speed. 8. determine when additional airwork outside the traffic pattern is needed to improve basic flying skills. 9. teach pilots to use trim throughout the approach to minimize control pressure. Centerline alignment 10. teach pilots how to recognize and how to maintain alignment with the runway centerline. 11. teach pilots to use the windsock or other wind direction indicators to determine wind conditions. 112 12. teach pilots to recognize wind drift. 13. teach pilots to compensate for wind drift. 14. teach pilots to make low passes over the runway to practice centerline alignment at slow-flight speeds prior to their first attempts at landing. Establishing flare point. 15. teach pilots a technique for establishing the desired flare point. 16. teach pilots to use visual approach slope indicators, if they are present. 17. establish a safe landing distance limit beyond which a go-around should be performed. Level off 18. teach pilots to look down the runway when nearing the level off point. 19. teach pilots to remove any remaining power after beginning the level off process. 20. teach pilots to continue to maintain runway alignment during level off. 21. teach pilots to continue to compensate for wind drift during level off. Touchdown 22. teach pilots to raise the nose to a specific touchdown attitude following the level off. 23. teach pilots to use increasing back pressure to maintain the nose in the touchdown attitude until touchdown. 24 teach pilots to touch down at the slowest possible speed. 113 25. teach pilots the importance of landing on the main wheels with the nose wheel raised. 26. teach pilots not to lower the nose during the touchdown process. 27. teach pilots to land near a desired touchdown point. Rollout 28. teach pilots to continue to maintain alignment with the runway centerline during rollout. 29. teach pilots to continue to compensate for wind drift during rollout. 30. teach pilots to avoid braking until the airplane has slowed from the touchdown speed and the nosewheel has contacted the runway. Other Factors 31. give pilots instruction in looking for traffic, including traffic on the runway. 32. give pilots instruction in going around. 33. cease pattern work when progress is not being made and should leave the pattern to work on airwork, ground reference maneuvers, or whatever is the root cause of the difficulty. 34. provide breaks to avoid fatigue. 35. teach pilots to go around rather than attempting to salvage a bad landing. 36. teach students to divide their attention between inside and outside references. 37. be cognizant of the psychological and physiological factors involved and should be able to deal with them as required. 114 APPENDIX B Weighting Letter Sent to Experts Dear : It has been suggested that in evaluating what flight instructors are teaching, that the 37 enclosed should statements may not be of equal importance. Would you please mark the should statements, next to the statement number, with a number between one and five. Five being among the most important statements of the list and one being among the least important statements. It is tempting to consider all statements as being worthy of a five. But even among 37 statements, all being important, there must be at least one that is the least important and at least one that is the most important. Would you please mark your recommendation next to the number of the statement and return the list to me in the enclosed envelope? Thanks, 115 APPENDIX C Experts‟ Weighting of the 37 Shoulds Experts‟ Weights 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Flight instructors should: be certain that pilots are able to fly all parts of the traffic pattern, except the flare and landing, before beginning serious landing practice. teach pilots to stabilize the approach soon after turning onto the final approach course, or by an altitude of 400 feet, or at about a half-mile from the end of the runway, depending on the traffic pattern flown. teach pre-solo pilots to use full flaps. teach pilots to apply the final flap setting as part of the stabilized approach. teach pilots to make power-on approaches. teach pilots to approach at an airspeed of 1.3Vso. teach pilots to add half the wind gust velocity to the final approach speed. determine when additional airwork outside the traffic pattern is needed to improve basic flying skills. teach pilots to use trim throughout the approach to minimize control pressure. teach pilots how to recognize and how to maintain alignment with the runway centerline. teach pilots to use the windsock or other wind direction indicators to determine wind conditions. teach pilots to recognize wind drift. teach pilots to compensate for wind drift. teach pilots to make low passes over the runway to practice centerline alignment at slow-flight speeds prior to their first attempts at landing. teach pilots a technique for establishing the desired flare point. teach pilots to use visual approach slope indicators, if they are present. establish a safe landing distance limit beyond which a go-around should be performed teach pilots to look down the runway when nearing 116 1 Expert Number 2 3 4 5 AV. 3 4 3 5 4 3.8 5 5 4 5 3 4.4 5 5 1 3 2 4 5 5 4 3 3.4 4.0 4 5 5 3 5 4 4 4 4 4 4 5 3 4 3 3.6 4.4 4.2 5 5 3 5 4 4.4 5 4 4 5 4 4.4 5 5 5 5 4 4.8 5 5 4 5 2 4.2 5 5 5 5 5 5 5 5 3 4 4.6 4.8 5 3 1 4 4 3.4 5 5 3 5 4 3.4 3 1 4 4 3 3.0 5 5 5 5 4 4.8 5 3 3 5 3 3.8 the level-off point. 19 teach pilots remove any remaining power after beginning the level-off process.. 20 teach pilots to continue to maintain runway alignment after level-off. 21 teach pilots to continue to compensate for wind drift during level-off. 22 teach pilots to raise the nose to a specific touchdown attitude following the level-off. 23 teach pilots to use increasing back pressure to maintain the nose in the touchdown attitude until touchdown. 24 teach pilots to touch down at the slowest possible speed. 25 teach pilots the importance of landing on the main wheels with the nosewheel raised. 26 teach pilots not to lower the nose during the touchdown process. 27 teach pilots to land near a desired touchdown point. 28 teach pilots to continue to maintain alignment with the runway centerline during rollout. 29 teach pilots to compensate for wind drift during rollout. 30 teach pilots to avoid braking until the airplane has slowed from the touchdown speed and the nosewheel has contacted the runway. 31 give pilots instruction in looking for traffic, including traffic on the runway. 32 give pilots instruction in going around. 33 cease pattern work when progress is not being made and should leave the pattern to work on airwork, ground reference maneuvers, or whatever is the root cause of the difficulty. 34 provide breaks to avoid fatigue. 35 teach pilots to go around, rather than attempting to salvage a bad landing. 36 teach students to divide their attention between inside and outside visual references. 37 be cognizant of the physiological and psychological factors involved and should be able to deal with them as required. 117 3 2 4 5 3 3.4 5 5 5 5 4 4.8 5 5 5 5 4 4.8 1 5 2 5 4 3.4 3 5 5 5 4 4.4 5 4 4 4 3 4.0 5 4 5 5 4 4.6 5 4 3 5 3 4.0 5 5 3 5 4 5 4 5 3 4 3.8 4.8 5 5 5 5 4 4.8 4 4 3 5 3 3.8 5 5 5 5 3 4.6 5 - 3 5 3 4.0 5 2 5 5 4 4.2 5 5 3 5 3 5 5 5 3 3 3.8 4.6 5 5 4 5 3 4.4 5 3 4 5 4 4.2 APPENDIX D Interview Questions After introductions, the data gathering part of the interview will begin with two broad, open-ended questions: 1. Please describe how you teach a pilot to land once you have determined that the pilot is ready. 2. Describe, in as much detail as you can, what you teach the pilot to do, and how you teach it, from the time the airplane is turned onto the final approach course until the airplane turns off the runway or is airborne after a touch and go. Probe Phase A. How do you determine when to begin concentrated Should Stab. App. 1 Stab. App. 9 Stab. App. 2,3,4, landing practice? B. How do you teach pilots to react to pitch control pressure? C. What do you teach pilots to do immediately after turning onto the final approach course? 5,6 D. How do you determine what final approach speed to Stab. App. 6 Stab. App. 7 Cent. Align. 11,12, teach? E. How do you teach pilots to react to the wind on the final approach? 13 118 Probe Phase F. What criteria do you establish for pilots regarding the Should Cent. Align. 10 Est. Flare Pt. 17 Cent . Align. 14 Cent. Align. 11 Est.. Flare Pt. 16 Est. Flare Pt. 15 Touchdown 27 J. How do you teach pilots to know when to level off? Level Off 18 K. How do you teach pilots to use their vision during the Est. Flare Pt. 15 Level Off 18 Touchdown 22 Stab. App. 5 Level Off 19 Level Off 19,20, position of the airplane with regard to the runway, both vertically and latterly? G. Do you have pilots practice anything in particular to sharpen their abilities to fly an accurate final approach path when close to the ground? H. What visual aids to landing do you teach pilots to use? I. How do you teach pilots to land where they want to? final approach and landing? L. How do you teach pilots to handle power in all phases of the approach and landing? M. What do you teach pilots to do after leveling off? 21 Touchdown 22,23, 24,25, 119 26 Probe N. How do you teach pilots to react to the wind during the flare, landing, and rollout? O. How do you teach pilots to slow the airplane down Phase Should Level Off 20, 21 Rollout 28,29 Rollout 30 Stab. App. 8 Other Factors 33 Rollout 28,29, during full-stop landings? P. What do you do if a pilot seems to have reached a plateau and does not improve with more instruction? Q. What do you teach pilots to do during the first few seconds after touchdown? 30 R. What do you teach pilots to do after the first few seconds Rollout of ground roll during full stop landings. 28,29, 30 S. Are there any physiological or psychological factors that Other Factors you consider during concentrated landing practice? T. What hazards have you encountered and how do you teach pilots to react to them. 33, 34, 37,36 Other Factors 31, 32, 35 120 APPENDIX E Pilot Study Interviews Analysis Analysis of the Transcripts A = Reviewer 1 B = Reviewer 2 C = Researcher Y = Yes No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Flight instructors should: 1A be certain that pilots are able to fly all parts of the traffic pattern, except the flare and landing, Y before beginning serious landing practice. teach pilots to stabilize the approach soon after turning onto the final approach course, or by an altitude of 400 feet, or at about a half-mile Y from the end of the runway, depending on the traffic pattern flown. teach pre-solo pilots to use full flaps. Y teach pilots to apply the final flap setting as Y part of the stabilized approach. teach pilots to make power-on approaches. Y teach pilots to approach at an airspeed of 1.3Vso. teach pilots to add half the wind gust velocity to the final approach speed. determine when additional airwork outside the traffic pattern is needed to improve basic flying skills. teach pilots to use trim throughout the Y approach to minimize control pressure. teach pilots how to recognize and how to Y maintain alignment with the runway centerline. teach pilots to use the windsock or other wind direction indicators to determine wind Y conditions. teach pilots to recognize wind drift. Y teach pilots to compensate for wind drift. Y teach pilots to make low passes over the runway to practice centerline alignment at slow-flight speeds prior to their first attempts at landing. 121 1B 1C 2A 2B 2C Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 teach pilots a technique for establishing the desired flare point. teach pilots to use visual approach slope indicators, if they are present. establish a safe landing distance limit beyond which a go-around should be performed teach pilots to look down the runway when nearing the level-off point. teach pilots remove any remaining power after beginning the level-off process.. teach pilots to continue to maintain runway alignment after level-off. teach pilots to continue to compensate for wind drift during level-off. teach pilots to raise the nose to a specific touchdown attitude following the level-off. teach pilots to use increasing back pressure to maintain the nose in the touchdown attitude until touchdown. teach pilots to touch down at the slowest possible speed. teach pilots the importance of landing on the main wheels with the nosewheel raised. teach pilots not to lower the nose during the touchdown process. teach pilots to land near a desired touchdown point. teach pilots to continue to maintain alignment with the runway centerline during rollout. teach pilots to compensate for wind drift during rollout. teach pilots to avoid braking until the airplane has slowed from the touchdown speed and the nosewheel has contacted the runway. give pilots instruction in looking for traffic, including traffic on the runway. give pilots instruction in going around. cease pattern work when progress is not being made and should leave the pattern to work on airwork, ground reference maneuvers, or whatever is the root cause of the difficulty. provide breaks to avoid fatigue. teach pilots to go around, rather than attempting to salvage a bad landing. 122 Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 36 37 teach students to divide their attention between inside and outside visual references. be cognizant of the physiological and psychological factors involved and should be able to deal with them as required. Total Y Y Y Y Y Y Y Y Y Y Y 25 26 21 23 18 15 Reviewer A and the Researcher Agreement Reviewer A and the researcher agreed on 29 of 37 items for interview 1. (29/37) x 100 = 78% agreement. Reviewer A found 25 of 37 shoulds for interview 1 compared to the researcher‟s 21 (21/25) x 100 = 84% agreement. Reviewer A and the researcher agreed on 27 of 37 items for interview 2. (27/37) x 100 = 73% Agreement. Reviewer A found 23 of 37 shoulds for interview 2 compared to the researcher‟s 15. (15/23) x 100 = 65% agreement. Reviewer B and the Researcher Agreement Reviewer B and the researcher agreed on 28 of 37 items for interview 1. (28/37) x 100 = 76% agreement. Reviewer B found 26 of 37 shoulds for interview 1 compared to the researcher‟s 21. (21/26) x 100 = 80% agreement. Reviewer B and the researcher agreed on 24 of 37 items for interview 2. (24/37) x 100 = 65%. Reviewer B found 18 of 37 shoulds for interview 2 compared to the researcher‟s 15. (15/18) x 100 = 83% agreement. 123 Number of Shoulds Found Reviewer A Interview 1 25 Interview 2 23 Reviewer B 26 18 Researcher 21 15 Percent Agreement on Number of Shoulds Found Interview 1 Interview 2 Researcher and Reviewer A 84 65 Researcher and Reviewer B 80 83 Average agreement = 78 percent Percent Agreement on Individual Shoulds Interview 1 Interview 2 Researcher and Reviewer A 78 73 Researcher and Reviewer B 76 65 Average agreement = 73 percent Ratio of the Number of Shoulds Taught to the Total Number of Shoulds This statistic is summarized below: Interview 1 Reviewer A 25/37 = .68 Reviewer B 26/37 = .70 Researcher 21/37 = .57 Interview 2 23/37 = .62 18/37 = .47 15/37 = .41 124 The researcher‟s statistic was 84 percent of reviewer A‟s and 81 percent of reviewer B‟s for interview one. The researcher‟s statistic was 66 percent of reviewer A‟s and 87 percent of reviewer B‟s for interview two. The average agreement was 79.5 percent. This met the 70 percent test for inter-rater reliability and suggested that the interview method was adequately reliable. Interviewee one was an experienced flight instructor. The transcript of the interview included 5 ½ pages. Interviewee two was an inexperienced flight instructor. The transcript of that interview included only 3 ½ pages. Therefore, it might have been more difficult to accurately assess the teaching of the inexperienced flight instructor. Also, the researcher, noting the relative brevity of the interview, might have extended the interview to obtain more data. This was considered during the interviews of the 32 participants in the study. 125 Appendix F First Letter to Sample Dear Fellow Flight Instructor: My name is Emanuel (Manny) Block. I began instructing in 1967 and have accumulated 6800 hours of total time and 3800 hours of instructing since then. I need your help in researching a very important topic of interest to all of us. I am conducting a research study on how we CFIs in Minnesota teach pilots to land. The results could help new instructors learn the ropes without a long period of trial and error. Landing accident and incident records point to inadequate skills as a large part of the problem. Can we do better? I think so. You can help by sharing your knowledge with me so that I can put our best practices together in a form that will be of use to the flying community. Would you agree to meet with me for about 45 minutes at a time and place of your choosing? The interview will be confidential. Please return the enclosed postcard whether or not you decide to participate in the study. I also need your flying and instructing time to help establish statistics for the study. Please return the enclosed postcard as soon as you can. Thanks, Emanuel Block 70 Orme Ct. St. Paul, MN 55116 651-699-7932 mannyblock@aol.com 126 APPENDIX G Return Postcard Telephone(s) ______________________ _______________________ E-mail address _____________________________________________ Total Flight Time _______hrs. Total Flight Instructing Time _______hrs. I have taught landings during the past year. Yes ___. No ___ I have given 10 or more hours of dual instruction during the past year. Yes ___. No ___. I am willing to be interviewed. Yes ___. No ___. Best time to call me _________________________________________ 127 Appendix H Second Letter to Sample Dear Fellow Flight Instructor: I recently sent you a letter and return postcard asking you to participate in research focused on teaching pilots to land. Your name was selected as part of a small random sample of the 2300 flight instructors in Minnesota. Your participation is very important to this research project. Even if you are no longer active as flight instructor, or do not want to be interviewed, I still need your completed postcard. This research is a crucial part of my doctoral program at the University of Minnesota and the project is potentially of great importance to the teaching of a critical pilot skill. Therefore, it is important that I receive a high rate of return for the postcards to assure that data can be analyzed accurately. Your identity will NOT be connected to ANY information collected! Even if you do not want to be interviewed for this project, I still need you to complete and return the enclosed card within the next 10 days. If you have very recently mailed the original card, please ignore this letter. Thanks, Emanuel Block 70 Orme Ct. St. Paul, MN 55116 651-699-7932 mannyblock@aol.com 128 APPENDIX I Spread Sheet Sequence: Random sequence number PerScore: (Score/37) x 100 Score: Number of shoulds PerWeight: (Weighted/153.8) x 100 Weighted: Sum of weighted shoulds TT: Total flight hours DG: Hours of dual given 129