Definitions for "Trim Tab"
Keywords:  trailing, rudder, aircraft, hinged, tab
small hinged portion of trailing edge of flight control surface adjusted by pilot to hold the aircraft in trim
A small auxiliary surface hinged on an airplane's control surfaces, used to bring it into balance or trim. This may be as simple as a small metal tab on the trailing edge of an elevator that is set to trim the aircraft for horizontal flight.
a small, adjustable hinged surface on the trailing edge of the aileron, rudder, or elevator control surfaces