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Increasing the elevator chord aft of the hinge, all else equal,

  • A.Raises both the effectiveness and the hinge moment
  • B.Raises effectiveness and lowers hinge moment
  • C.Lowers both
  • D.Leaves both unchanged

Answer: A

A bigger surface aft of the hinge produces more lift and therefore more control power and a larger hinge moment together, which is the trade that makes balancing necessary in the first place. Getting more effectiveness for less force requires balance rather than size. Lowering both would follow from a smaller surface. Nothing here leaves them unchanged, since both scale with the area and chord aft of the hinge line.

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