Discussion
A trim tab allows the pilot to
Answer: D
A trim tab is deflected until the hinge moment is zero at the required control position, so the surface stays put with the stick released and the pilot holds no force. It does not extend the deflection range, which is set by the stops. It has a small drag effect either way and is not a drag device. And it has nothing to do with flutter, which is a mass and stiffness matter.
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