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A stabilator or all moving tailplane

  • A.Is used only on gliders
  • B.Uses the whole surface as the control
  • C.Has a fixed surface with a hinged elevator
  • D.Cannot be trimmed

Answer: B

Deflecting the entire surface produces far more pitching moment than an elevator of the same total area could. The arrangement is common where control power is at a premium, and it usually carries an anti-servo tab to restore adequate feel.

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