Pitch-change apparatus and method of pitching rotor blades
A method of pitching rotor blades by interrupting torque applied to the hub.
1. A method of pitching rotor blades, comprising:
applying torque to a hub to rotate the hub about an axis;
disposing a pawl between an upper plate and a lower plate, the pawl being configured to selectively engage each of the upper plate and the lower plate; and
decreasing the torque applied to the hub;
wherein the decreasing the torque causes a change in engagement between the pawl and at least one of the upper plate and lower plate thereby causing rotation of a plurality of rotor blades about their respective pitch-change axes from a first angle to a second angle;
increasing the torque to the hub after the decreasing the torque applied to the hub;
after the increasing the torque to the hub, decreasing the torque again;
wherein the decreasing the torque again causes rotation of the plurality of rotor blades about their respective pitch-change axes from the second angle to the first angle.