Take-Off

STUDENT GUIDE

T-39 FLIGHT PREPARATION

VMO

Maximum Operating Speed

Rotation Speed

VREF

Final Approach Speed at threshold (1.3 x Vso)

Stall Speed dirty

VSO

Best Angle of Climb

VXSE

Best Angle of Climb, single engine

Best Rate of Climb

VYSE

Best Rate of Climb, single engine

Wet Runway, standing water

Weight

ZFW

Zero Fuel Weight

%RPM

Revolutions Per Minute - measured in percent

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