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Static margin is defined as

  • A.The distance from the centre of gravity to the neutral point, as a fraction of chord
  • B.The distance from the nose to the centre of gravity
  • C.The difference between maximum and minimum lift coefficient
  • D.The elevator deflection required to trim

Answer: A

A larger static margin means a steeper restoring moment and a more stable aeroplane. It also means heavier stick forces and more trim drag, which is why designers aim for a margin that is adequate rather than as large as possible.

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