US 11,814,164 B1
Active blade-pitch change systems and methods
John Robert Wittmaak, Newark, TX (US); and Alan Hisashi Steinert, Fort Worth, TX (US)
Assigned to Textron Innovations Inc., Providence, RI (US)
Filed by Textron Innovations Inc., Providence, RI (US)
Filed on Apr. 26, 2022, as Appl. No. 17/729,646.
Int. Cl. B64C 29/00 (2006.01); B64C 11/30 (2006.01); B64D 27/24 (2006.01)
CPC B64C 29/0033 (2013.01) [B64C 11/301 (2013.01); B64C 11/305 (2013.01); B64D 27/24 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of verifying operation of an aircraft in a pre-defined flight mode, the method comprising:
operating the aircraft in a first flight mode, the first flight mode being characterized by a first band of values of motor torque and motor speed;
commanding the aircraft to transition to a second flight mode, the second flight mode being characterized by a second band of values of the motor torque and the motor speed;
determining the motor torque and the motor speed;
responsive to a determination that the motor torque and the motor speed are within the second band, determining that the aircraft has successfully transitioned to the second flight mode; and
responsive to a determination that the motor torque and the motor speed are not within the second band, determining that the aircraft has not successfully transitioned to the second flight mode.