Patent ID: 9102419
Filing Date: 2015-08-11
Classification: B64C,B64F

Abstract:
1. A computer-implemented method for evaluating collective alignment of rotor blades of an aircraft, the method comprising: determining, by a processor, a collective alignment condition of the rotor blades based on data received from an auto-rotation test flight of the aircraft; determining, by the processor, a first engine torque value for the aircraft while the aircraft is on the ground and the aircraft rotor blades are operated at a normal speed; associating, by the processor, the first engine torque value with the determined collective alignment condition; determining, by the processor, a second engine torque value for the aircraft while the aircraft is on the ground and the aircraft rotor blades are operated at the normal speed; and providing, by the processor, an indication of the collective alignment condition when the second engine torque value is within a tolerance limit of the first torque value.