Quantcast Take-Off

 

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STUDENT GUIDE
T-39 FLIGHT PREPARATION
VMO
Maximum Operating Speed
VR
Rotation Speed
VREF
Final Approach Speed at threshold (1.3 x Vso)
Stall Speed dirty
VSO
VX
Best Angle of Climb
VXSE
Best Angle of Climb, single engine
VY
Best Rate of Climb
VYSE
Best Rate of Climb, single engine
WR
Wet Runway, standing water
WT
Weight
ZFW
Zero Fuel Weight
%RPM
Revolutions Per Minute - measured in percent
2.
TAKE-OFF
a. Definitions
(1)  V1: The speed above which the takeoff is continued and below which the takeoff is
abandoned in the event of an engine failure.
(2)  Refusal Speed: Used in conjunction with critical field length chart to determine
speed at which an aircraft can either accelerate to refusal speed and then stop, or
accelerate to refusal speed and continue takeoff while one engine is failed at refusal
speed. All available remaining runway will be required to get the aircraft airborne.
(3)  V2: Must be not less than 1.1 x VMC or 1.2 VS and must be attained before reaching
a height of 35 feet.
(4)  VR: The speed at which the aircraft is rotated to the takeoff attitude. VR must not
be less than V1 or less than 1.05 x VMC. It must also be high enough to allow V2 to be
attained before the aircraft reaches a height of 35 feet.
(5)  VS: The stalling speed or the minimum steady flight speed at which the aircraft is
controllable.
(6)  VMCA: The speed required to provide sufficient control to fly a straight path over the
ground with a failed engine. This speed is based on the engine windmilling, takeoff
thrust on the good engine, and no more than 5 bank away from the failed engine. At
minimum control speed, it may be necessary to sacrifice altitude for airspeed while
putting the aircraft in clean configuration and obtaining sufficient airspeed to climb.
G-3


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