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Which of these is a ground-adjustable device?

  • A.A bobweight
  • B.A servo tab
  • C.An artificial feel unit
  • D.A fixed trim tab

Answer: D

A fixed trim tab is a small metal tab bent by a mechanic on the ground to remove a standing out-of-trim condition, common on light aeroplanes and on ailerons that will not sit level. A bobweight is a fixed installation sized at design. A servo tab is flown by the pilot in the air. An artificial feel unit is an active system. Only the first is set by hand between flights, which is exactly what ground-adjustable means.

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