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A tab geared to move in the same direction as the surface, deliberately increasing the stick force, is an _____ tab.

  • A.Balance
  • B.Servo
  • C.Trim
  • D.Anti-balance

Answer: D

It is an anti-balance tab, fitted when the force or the force per g would otherwise be too low, or to restore a positive gradient on a surface that is close to overbalance. A balance tab moves the opposite way and lightens the control. A servo tab is the pilot's only direct connection, flying the surface aerodynamically. A trim tab sets the zero-force position without altering the gradient.

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