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The corner speed, or manoeuvre speed, is the speed at which

  • A.The aircraft reaches its maximum level speed
  • B.The aircraft first becomes controllable
  • C.Compressibility effects begin
  • D.The stall boundary meets the limit load factor

Answer: D

At the corner speed a full-deflection pull produces exactly the limit load factor and the aircraft stalls at the same moment. Below it the aircraft cannot be over-stressed by elevator alone, and above it full deflection would exceed the structural limit, which makes it the fastest speed for a maximum-rate turn.

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