Takehome Midterm Exam
NAME:____________________________ HONOR CODE: _____
SYST 461/660
MID-TERM EXAM (TAKE HOME)
SPRING 2014
Maximum Throughput Capacity (MTC) for Single, Independent Runway
Section 1
Definition of Terms
Section 2
Analysis
Takehome Midterm Exam
1
NAME:____________________________ HONOR CODE: _____
DEFINITION OF TERMS
Provide a definition for each term. Use short description (i.e. phrases and bullet points). Provide
equations and units if applicable
1. Maximum Throughput Capacity (MTC)
2. Runway Occupancy Time (ROT)
3. Simultaneous Runway Occupancy (SRO)
4. Arrival Wake Vortex Separation Distance
5. Inter-arrival Separation Distance (Sij)
Takehome Midterm Exam
NAME:____________________________ HONOR CODE: _____
6. Inter-arrival Separation Time (Tij)
7. List TWO parameters (in the model) related to aircraft performance that affect MTC
8. List TWO parameters (in the model) related to Air Traffic Control performance that
affect MTC
Takehome Midterm Exam
2
NAME:____________________________ HONOR CODE: _____
ANALYSIS
Using the Workbook and the SYST 660 spreadsheet (provided in the Syllabus) answer the following
questions:
1. Why are there Compression (i.e. decreasing separation) and Separation (i.e. expanding
separation) cases? Explain.
2. Which combinations of Lead-Trailing pairs on approach are Compression or Separation cases
leading
aircraft
Trailing aircraft
1(H)
2(L)
3(M)
4(S)
I(H)
2(L)
3(M)
4(S)
3. Write down the equations for Inter-arrival Time (for both compression and separating cases)
4. Length of Approach Path
a. Which combinations of Lead-Trailing pairs on approach include Length of Approach Path
Takehome Midterm Exam
leading
aircraft
NAME:____________________________ HONOR CODE: _____
Trailing aircraft
1(H)
2(L)
3(M)
4(S)
I(H)
2(L)
3(M)
4(S)
b. What role does length of approach path have in determining Runway capacity. Explain
(short sentence)
5. Write down the equations for the Probability of each class of Lead-Training Aircraft Pairs (P i,j)
6. What is the Average Arrival Capacity (Ops/hr) for the following scenarios*:
Use default values for probability of fleet mix, approach speed, runway occupancy time. Set ATC
Buffer to 0. Set Length of Approach Path to 6nm
a. Fleet Mix = 100% Heavy
- 37.5 ops/hr
b. Fleet Mix = 100% Large –
52 ops/hr
c. Fleet Mix = 100% Medium –
d. Fleet Mix = 1005 Small –
44 ops/hr
36 ops/hr
Takehome Midterm Exam
NAME:____________________________ HONOR CODE: _____
7. What is the impact of fleet type?
Plot Average Arrival Capacity (Ops/hr) (y-axis) vs Aircraft Size (Heavy, Large, Med, Small) (xaxis).
Use default values for probability of fleet mix, approach speed, runway occupancy time. Set ATC
Buffer to 0. Set Length of Approach Path to 6nm.
Does the Average Arrival Capacity change monotonically with decreasing aircraft? Explain
why/why not?
8. What is impact of ATC Buffer?
Plot Average Arrival Capacity (Ops/hr) (y-axis) vs ATC Buffer (x-axis). ATC Buffer (Default -30%,
Default – 20%, Default -10%, 0, Default + 10%, Default + 20%, Default +30%). Use default values
for probability of fleet mix, approach speed, runway occupancy time. Set Length of Approach
Path to 6nm.
Does the Average Arrival Capacity change monotonically with increasing ATC Buffer? Explain
why/why not?
Takehome Midterm Exam
NAME:____________________________ HONOR CODE: _____
9. What is impact of Runway Occupancy Time (ROT)?
Plot Average Arrival Capacity (Ops/hr) (y-axis) vs ATC Buffer (x-axis). Runway Occupancy Time
(Default -20%, Default -10%, default +10%, Default +20%). Use default values for probability of fleet
mix, approach speed. Set ATC Buffer to 0. Set Length of Approach Path to 6nm.
Does the Average Arrival Capacity change monotonically with increasing ATC Buffer? Explain
why/why not?
10. Investment decision. (Use answers from 8, 9).
Two vendors are vying for a contract to improve runway capacity at your airport. You are
assigned the task of determining which proposal will yield the biggest improvement in capacity.
The proposals cost the same.
(1) Vendor Boebus are proposing equipping aircraft with improved brakes that will reduce the
average ROT from default values.
(2) Vendor Airoeing are proposing equipping aircraft with Automatic Dependent SurveillanceBroadcast (ADS-B) and Cockpit Display of Traffic Information (CDTI) which will reduce the
ATC Buffer from default values.
For what range of % improvement does ROT or ADS-B/CDTI yield improved runway capacity? Be
specific. Explain. (Note: maybe a non-intuitive answer).
Which proposal would you select? Explain.