Thrust reversal, also called
reverse thrust, is the temporary diversion of an
aircraft engine's exhaust so that it is directed forward, rather than backwards. Reverse thrust acts against the forward travel of the aircraft, providing
deceleration. Thrust reverser systems are featured on many
jet aircraft to help slow down just after touch-down, reducing wear on the brakes and enabling shorter landing distances. Such devices affect the aircraft significantly and are considered important for safe operations by
airlines. There have been accidents involving thrust reversal systems.