Helicopter with coaxial, contrarotating main rotors has at least three control drives at distance from main rotor axle; each control drive has rotor and drive device

摘要

The helicopter (1) has at least two main rotors (2,3) mounted coaxially with respect to each other on a main rotor axle and at least one drive device (4,5) that drives the main rotors to rotate in contrarotation. It also has at least three control drives (7,10,11) that are provided at a distance from the main rotor axle (15). Each control drive has a rotor and a drive device. An independent claim is also included for a method of controlling helicopters.