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In accordance with CS-25, the take-off safety speed V2MIN for turbo-propeller powered aeroplanes with more than three engines may not be less than:
  • A
    1.13 VSR.
  • B
    1.2 VSR.
  • C
    1.08 VSR.
  • D
    1.18 VSR.

V2MIN
The minimum take-off safety speed, or the speed at the screen height, with the critical engine inoperative.

Class A aircraft V2MIN may not be less than:

  • 1.13VSR for 2 and 3 engine turboprops and all turbojets without provision for obtaining a significant reduction in the one engine inoperative power-on stalling speed
  • 1.08VSR for turboprops with more than 3 engines and turbojets with provision for obtaining a significant reduction in the one engine inoperative power-on stalling speed.
  • 1.1VMC

Class A uses VSR, the stall reference speed, instead of VS1 which is basically the same.

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