Abstract: Aircraft engine low thrust detection system having sensors for each engine mounted on the engine nacelle in the slip stream of each propeller. A given amount of decrease in engine thrust is detected by a thrust sensor and a signal is generated for a control device. The control device in turn activates a visual signal on the appropriate propeller control level in the cockpit informing the pilot which engine is losing thrust and whether the power loss is partial or total. Aural signals are also installed with different pitches to assist the pilot in identifying the engine which is losing power.

Abstract: Control system for aircraft wing spoilers in which the amount of centering moment provided by the downwardly moving or aerodynamically inactive spoiler is increased as the aircraft flaps are extended, the control system including a differential linkage mechanism interconnecting the flaps and the spoiler actuating mechanism. In effect different schedules of spoiler motion in response to cockpit control inputs are generated with wing flaps in different positions.