TC 1-237 (OCT 07)
REVISION ACADEMICS
SPUD
TASK 1114 PERFORM A
ROLLING TAKEOFF
SPUD
Rolling T/O Significant Changes – Standards
STANDARDS: Appropriate common standards plus the following
additions/modifications:
1. Before liftoff—
a. Establish and maintain power, as necessary.
b. Maintain alignment with takeoff direction ±5 degrees.
c. Accelerate to desired/planned takeoff speed not to exceed 60 knots
ground speed.
2. After liftoff—
a. Adjust power, as required, not to exceed aircraft limits.
b. Maintain ground track alignment with the takeoff direction with
minimum drift.
c. Maintain maximum rate of climb airspeed ±5 knots indicated
airspeed (KIAS).
d. Maintain aircraft aligned with runway (or suitable liftoff
surface) below maximum rate of climb airspeed.
e. Maintain aircraft in trim above maximum rate of climb airspeed.
SPUD
Rolling T/O Significant Changes – Description
DESCRIPTION:
1. Crew actions.
a. The pilot in command (PC) will confirm the
aircraft gross weight (GWT), aircraft power
available and that area is suitable for the maneuver.
Considerations should include wind effects on takeoff
direction, barriers/obstacles and density altitude.
SPUD
Rolling T/O Significant Changes – Procedures
Note. A rolling takeoff may be used when hover power for takeoff is
marginal or insufficient and a takeoff must be made, or as an alternate
method of takeoff when sufficient power is available (dissipate dust, reduce
rotor downwash). Use the rotor system thrust to accelerate the aircraft to a
more efficient speed for flight.
Note. For training, use 10 percent torque below the aircraft 10-foot hover
torque to simulate the maximum torque available.
Note. To determine maximum torque available when in ground effect (IGE)
hover power is not present, apply collective, not to exceed dual engine
torque and turbine gas temperature (TGT) limits, while observing the TGT.
Maximum torque available will be indicated by a droop in rotor RPM with
further increase in the collective. Note the torque and reduce the collective.
Fluctuation in torque from flight control inputs and environmental conditions
should be factored in to the torque value used for the maneuver.
SPUD
Rolling T/O Significant Changes – Procedures
Begin accelerating the aircraft forward by smoothly applying
forward cyclic while progressively increasing the collective to a
power setting that will ensure that the main landing gear
wheels remain in contact with the surface until takeoff airspeed
is achieved.
Use the pedals to maintain heading aligned with the desired
takeoff direction. The tailwheel may come off the surface as
the stabilator begins to produce lift with forward airspeed.
SPUD
How to Determine Takeoff Airspeed???
Problem: Currently, no performance charts exist to accurately determine
takeoff airspeed in the UH60 Operator’s Manual.
A technique/method to determine takeoff airspeed if actual dual engine
hover capability does not exist (this is not described in the ATM):
1. Use the appropriate aircraft operator’s manual.
1. Enter the bottom of the appropriate CRUISE chart at 10% less than the TORQUE
AVAILABLE ~ 30 MIN line (for UH-60A) or TORQUE AVAILABLE ~ 10 MIN
line (for UH-60L/M). Adjust for the ATF.
1. Move up until intersecting the aircraft takeoff gross weight (GW~1000 LB) curve,
then move left or right to the TRUE AIRSPEED ~ KTS. Note takeoff airspeed.
1. This airspeed will allow the aircraft to maintain dual-engine level flight at 90% of
the maximum torque available.
For training: A method is to use a predetermined KTAS (ex. 30 KTAS)
for the takeoff airspeed.
SPUD
How to Determine Takeoff Airspeed???
• You have determined that your aircraft weighs
20000 lbs.
• You note the FAT is 20ºC.
• You adjust the barometric altimeter to 2992 and
note the current PA is 6000 ft.
• You open the aircraft -10 to the appropriate cruise
chart in chapter 7.
SPUD
PA – 6000 FT
Can you hover?
FAT - 20ºC
Acft GWT - 20000
NO
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Note Maximum
Torque
IRP
– 87%
Enter the
chart
at
Maximum
Torque
Move straight
up to
IRP
– right
10% to
the
aircraft
GWT
Move
the
true
87%airspeed
- 10 % = 77%
PA – 6000 FT
FAT - 20ºC
Acft GWT - 20000
The takeoff airspeed for
this rolling takeoff is 30
KTAS
30 KTAS
SPUD
Rolling T/O Significant Changes – Procedures
 Upon reaching takeoff airspeed, adjust the collective to maximum
torque available or as planned/briefed and cyclic as necessary to
allow the aircraft to become airborne.
 Depending on liftoff speed the stabilator may cause a slight nose
down attitude.
 At approximately 20 feet above the surface, apply forward cyclic to
maintain a level acceleration to the maximum rate-of-climb airspeed.
Place the aircraft in trim as soon as maximum rate of climb
airspeed is achieved after the aircraft becomes airborne
commensurate with surface obstacles.
SPUD
Rolling T/O Significant Changes – Procedures
Trade off altitude as necessary to gain airspeed if the area is clear
of obstacles. Maintain heading with pedals so the aircraft is aligned
with the runway/surface takeoff direction when the aircraft is below
maximum rate-of-climb airspeed should the takeoff need to be
aborted
d. Upon reaching maximum rate-of-climb airspeed, adjust the attitude
to maintain the maximum rate-of-climb airspeed and maintain power
as necessary until reaching the desired level-off altitude.
e. The P (pilot not on the controls) will monitor torque and TGT values
for the P* (pilot on the controls), and power is available and applied
as planned/briefed.
SPUD