Cyclic pitch control for a helicopter.

摘要

A helicopter includes a system to effect cyclic pitch control and thereby control the horizontal movement of the helicopter. The rotor blades are driven by a rotor shaft 108 and which is hinge mounted on this rotor shaft, such that the angle between the plane of rotation of the main rotor and the rotor shaft may vary. An actuator 206 is provided which acts on a swash plate type control ring 204 that is connected to the rotor blades to vary their pitch. Thus by changing the angle of incidence of at least one blade of the rotor cyclically along at least part of a 360-degree rotation path around the rotor shaft, a variation in a lift force of the blade along at least part of the rotations path is created. This causes the main rotor to tilt and the body to be urged in a relatively horizontal direction from a relative position of rest. The actuator is preferably arranged so that it is not permanently linked to the control ring, and in this way the rotor stabilizes itself more easily when not under the influence of the actuator. More than one actuator may be provided around the control ring. The helicopter may be a toy remote controlled helicopter.