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Stick force in a steady pull-up comes from

  • A.The change in hinge moment with elevator deflection and pitch rate
  • B.The aeroplane weight alone, acting through the elevator to resist the pilot's pull
  • C.The trim tab position only
  • D.The engine thrust setting

Answer: A

In a steady manoeuvre the elevator is displaced from its trim position and the aeroplane has a pitch rate, so both the deflection and the rate contribute to the hinge moment the pilot must hold, which is why stick force per g depends on the manoeuvre margin rather than the static margin. Weight enters through the load factor demanded. The trim tab fixes the zero-force point rather than the gradient. Thrust plays no part in the hinge balance.

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