Aircraft Thrust Reverser

A mechanical device located in the exhaust area of a jet engine on large airplanes. It is designed to deflect the engine fan or exhaust gases forward to increase the descent angle in flight, or to decrease the landing speed on the ground. It can take the form of pivoting clamshell doors, cascade vanes (diverters); translating sleeves; blocker doors, or the like. When not in use it must be streamlined to the configuration of the engine nacelle.