Patent ID: 8918235

Claim:
A primary flight control system for providing additional yaw control to a multi-engine aircraft experiencing thrust asymmetry, comprising: a plurality of flight operations sensors; a thrust differential calculator module configured to receive flight operations parameters from the plurality of flight operations sensors, the thrust differential calculator module configured to: receive an aircraft sideslip input corresponding to the sideslip angle of the aircraft, receive the an aircraft roll input corresponding to at least one of an aircraft roll command and an aircraft roll rate, receive an engine asymmetry signal representing whether the aircraft is experiencing thrust asymmetry, and generate a thrust differential from the aircraft sideslip input, the aircraft roll input, and the engine asymmetry signal; a thrust limit module configured to receive the thrust differential and a reference engine thrust and to calculate a maximum engine thrust limit for an operating engine of the aircraft; and an engine operations module configured to detect asymmetric thrust, determine the operating engine of the aircraft to be limited, and to limit the operational thrust of the operating engine of the aircraft according to the maximum engine thrust limit.