rudder


rudder
The primary vertical and movable control surface, which is hinged to the fin and primarily controls the yawing movement of the aircraft. The rudder is moved by foot-operated pedals (called rudder pedals) in the cockpit. A rudder application causes a yawing motion about the vertical axes. A typical rudder control surface includes aerodynamic balance and tab features. All-moving vertical stabilizers replace rudders on some supersonic aircraft.

Aviation dictionary. 2014.