Patent ID: 9718536
Date: 2017-08-01
CPC Classifications: B64C,B64D,Y02T

Claim:
1. A method of controlling a Counter-Rotating Open-Rotor (CROR) comprising: commanding a Blade Angle (Beta1 commanded) of a first rotor through a first pitch change system such that a Blade Angle (Beta2 Actual) of a second rotor having a second pitch system mechanically linked to the first pitch change system changes according to a function of the Blade Angle (Beta1 commanded) of the first rotor to provide a linear relationship between an actual Blade angle (Beta1 Actual) of the first rotor and the Blade Angle (Beta1 commanded), of the first rotor and a non-linear relationship between the Blade Angle (Beta2 Actual) of the second rotor and the Blade Angle (Beta1 commanded) of the first rotor.