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A twin engine aeroplane suffers an engine failure shortly after take-off at a speed below its published minimum control speed in the air.

What is the expected consequence?

  • A.Directional stability is unaffected
  • B.The aeroplane diverges in yaw
  • C.The aeroplane stalls immediately
  • D.The fin stalls and rudder lock occurs

Answer: B

Below that speed the dynamic pressure is too low for the rudder to generate the required moment. The speed is established by flight test precisely so that the take-off can be planned to keep above it before the aeroplane is committed.

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