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A stabilator differs from a conventional tailplane and elevator in that

  • A.It is fixed and only the tab moves
  • B.The entire surface pivots
  • C.It has no anti-servo tab
  • D.It cannot be trimmed

Answer: B

Pivoting the whole surface gives far more pitch authority per degree, which is why it appears on fast aircraft where a trailing-edge elevator would lose effectiveness. Its power is also why it needs an anti-servo tab to restore feel.

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