Balance tab
Tags: FAA Pilot's Handbook
Balance tab. An auxiliary control mounted on a primary control surface, which automatically moves in the direction opposite the primary control to provide an aerodynamic assist in the movement of the control.
Balance Tab. A hinged area at the rear portion of a control surface designed to move in the opposite direction to the control surface and so balance it.
On some aircraft with all-flying stabilators an anti-servo tab acts as a trimming device. In this use some manufacturers term it a “balance tab' or “anti-balance tab.' ...
  
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