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A set back hinge balances a control surface by

  • A.Reducing the surface span
  • B.Moving the hinge line aft
  • C.Moving the hinge line forward
  • D.Adding a tab behind the hinge

Answer: B

The airload on the area ahead of the hinge produces a moment opposing that from the area behind it. The degree of balance is set by how far back the hinge is placed, and too much produces overbalance and force reversal.

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