Patent ID: 11866163
Assignee: PIASECKI AIRCRAFT CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 18:
19. A method of balancing the torque of the main rotor of a rotary wing aircraft, the method comprising:
a) providing a tail rotor, the tail rotor having one or more tail rotor blades and a tail rotor hub, each of the one or more tail rotor blades having a blade root, a blade tip and a blade span between the blade root and the blade tip, the blade root being attached to the tail rotor hub and configured for rotation about the tail rotor hub, the one or more tail rotor blades having a parked position in which each of the one or more tail rotor blades is not rotating about the tail rotor hub and the blade tip of each of the one or more tail rotor blades is aft of the tail rotor hub, the one or more tail rotor blades Wade having a configuration to move to the parked position when the rotary wing aircraft is flying in the forward direction and each of the one or more tail rotor blades is not rotating;
b) providing a control surface on the rotary wing aircraft, the control surface having an adequate control authority when the rotary wing aircraft is flying in a forward direction to balance the main rotor torque;
c) flying the rotary wing aircraft in the forward direction so that the control surface has adequate control authority to balance the main rotor torque;
d) stopping the one or more rotor blades from rotating.