Determining rotorcraft collective adjustment during ground test

摘要

A method for evaluating a collective alignment of rotor blades for an aircraft while the aircraft is on the ground is disclosed. The method includes determining an air density altitude, and determining a torque value for each engine of the aircraft, while the aircraft rotor blades are operated at a normal speed and the rotor blades are set to a full down position for ground operations via a collective controller. The method further includes evaluating the collective condition by comparing the torque value to a predetermined flat pitch torque alignment limit for the air density altitude, and providing an indication of the collective condition.

主权项

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.