Patent ID: 8423206

Claim:
A method of varying roll rate limits of an aircraft while flying with thrust asymmetry, comprising: (a) calculating a value of a flight parameter indicative of thrust asymmetry; (b) applying either a nominal maximum commandable roll rate or a reduced maximum commandable roll rate less than said nominal maximum commandable roll rate in a roll rate command system, said nominal maximum commandable roll rate being applied in response to said calculated flight parameter value being less than a lower threshold value, and said reduced maximum commandable roll rate being applied instead of said nominal maximum commandable roll rate in response to said calculated flight parameter value increasing from a value less than an upper threshold value to a value greater than said upper threshold value, said upper threshold value being greater than said lower threshold value; and (c) controlling deflection of control surfaces of the aircraft so that the roll rate of the aircraft, after receipt of a roll rate command from a pilot, does not exceed the applied maximum commandable roll rate.