A rotorcraft (or rotary wing aircraft)

A rotorcraft (or rotary wing aircraft) is a heavier-than-air aircraft that uses lift generated by wings, called rotor blades, that revolve around a mast. Several rotor blades mounted to a single mast are referred to as a rotor. The International Civil Aviation Organization (ICAO) defines a rotorcraft as supported in flight by the reactions of the air on one or more rotors

Since the rotor of the rotorcraft is unpowered, it does not have large vibrations and noises caused by the power-driven rotor system. This vibration and noise will not shorten or increase the service life of the rotor, body, etc. Occupant fatigue. The impact caused by the rotorcraft's power-driven propeller is obviously much smaller.

The gyrocopter can automatically adjust so that the fuselage has good pitch stability, roll stability and speed stability. The rotating propeller disk is like a large inertial wheel, and the rotor has no periodic pitch changes. In addition, the rotor installation angle is larger than that of the helicopter, which has better gyroscopic effect, higher stability and strong wind resistance.