Trim Tab

A small, adjustable surface on the trailing edge of a primary flight control (most commonly the elevator) that the pilot sets to relieve sustained control pressure. By deflecting the trim tab, aerodynamic forces hold the primary control surface in the desired position without the pilot needing to maintain constant pressure on the yoke or stick. Proper trim technique reduces pilot fatigue on long flights and allows smoother, more precise control. Most training aircraft have elevator trim operated by a wheel or crank in the cockpit, and some also have rudder trim.