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A close-coupled canard differs from a conventional tailplane chiefly in that it

  • A.Carries no load at all
  • B.It trims with an upward load
  • C.Cannot be moved in flight
  • D.Operates entirely in subsonic flow

Answer: B

A tailplane usually trims a nose-down moment by pushing down, which subtracts from the lift the wing must make. A canard trims by lifting, so it adds. The cost is a destabilising contribution that must be handled by relaxed static stability and a flight control computer.

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