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Which of the following would NOT reduce trim drag in cruise?

  • A.Moving the centre of gravity aft within limits
  • B.Using a trimmable horizontal stabiliser
  • C.Transferring fuel to an aft trim tank
  • D.Moving the centre of gravity forward

Answer: D

A forward centre of gravity needs a larger download to balance the wing, so trim drag grows. The other three all reduce the download the tail must carry, and aft fuel transfer is used in service for exactly this reason.

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