FULL AUTHORITY ENGINE-OUT CONTROL AUGMENTATION SUBSYSTEM

A full authority engine-out control augmentation subsystem for use in a flight control system to assist a pilot and/or lateral-directional control subsystem in compensating for the yawing moment produced by the differential engine thrust that occurs when the power produced by an engine located on one side of a multi-engine aircraft is lost (or reduced) with respect to the other engines is disclosed. The engine-out control augmentation subsystem produces a compensating rudder command (27) based on straight-gain (21), lag filter (15) and washout filters (23 and (25) modifications of a differential engine thrust signal (11). The engine-out control augmentation subsystem will function with both conventional mechanical and electronic (fly-by-wire) flight control systems.