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The most demanding case for elevator power in trim is usually

  • A.Mid centre of gravity in the cruise
  • B.Aft centre of gravity during the climb
  • C.Forward centre of gravity at low speed with flaps down
  • D.Aft centre of gravity at high speed

Answer: C

A forward centre of gravity demands the largest nose up moment while low speed leaves the surface least effective. Adding flap deflection usually worsens the nose down moment further, which is why this combination sets the forward loading limit.

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