Flaps 1 to Flaps 0 Speed is which of the following?

Flaps 1 to Flaps 0 Speed is which of the following?

• A. VT - 15
• B. V2
• C. Vref
• D. Vmc

Answer: (A)

Flap retraction from 1 to 0 has its own defined transition speed. This speed is chosen to ensure you stay within flap placard limits and maintain good control authority as you move to a clean configuration, especially during the climb after takeoff. In this airplane’s procedures, the transition speed from Flaps 1 to Flaps 0 is set as VT minus 15 knots, giving a safe margin to retract without forcing the airspeed too high for the remaining flaps. Understand that the other speeds listed are for different phases or considerations: V2 is the takeoff safety speed used during liftoff and initial climb, Vref is the landing reference speed used at approach, and Vmc is the minimum control speed with one engine inoperative. None of those describe the flap retraction transition, so VT minus 15 knots is the correct choice for the Flaps 1 to 0 transition.

Flap retraction from 1 to 0 has its own defined transition speed. This speed is chosen to ensure you stay within flap placard limits and maintain good control authority as you move to a clean configuration, especially during the climb after takeoff. In this airplane’s procedures, the transition speed from Flaps 1 to Flaps 0 is set as VT minus 15 knots, giving a safe margin to retract without forcing the airspeed too high for the remaining flaps.

Understand that the other speeds listed are for different phases or considerations: V2 is the takeoff safety speed used during liftoff and initial climb, Vref is the landing reference speed used at approach, and Vmc is the minimum control speed with one engine inoperative. None of those describe the flap retraction transition, so VT minus 15 knots is the correct choice for the Flaps 1 to 0 transition.