Slip/Skid (Coordination)

Uncoordinated flight conditions visible on the inclinometer (slip/skid ball) in the turn coordinator. A slip occurs when insufficient rudder is applied in the direction of a turn, causing the ball to move toward the inside of the turn and the aircraft to slide inward. A skid occurs when excessive rudder is applied, pushing the ball to the outside of the turn and the aircraft's tail swinging outward. Coordinated flight, where the ball is centered, produces the most efficient aerodynamic performance and the most comfortable ride. The correction is always to "step on the ball," applying rudder pressure toward whichever side the ball has displaced.