ROTOR ASSEMBLY FOR A ROTORCRAFT

摘要

A rotor assembly (5) for a rotorcraft, such as a helicopter, comprises a plurality of rotors (7) rotatable about a hub (17).The assembly (5) is operable to vary the angular speed of the rotors (7) about the hub (17), relative to one another.The assembly (5) may comprise a drive means operable to drive each of the plurality of rotors (7) at a different radial distance from the hub.