What is a rotorcraft?

A rotorcraft is an "aircraft" that provides lift and is heavier than air by using a non-powered rotor.

The rotorcraft is propelled by a propulsion device, which has two types of propellers and jets.

When the rotorcraft is advancing, the airflow blows the rotor and generates lift. It cannot take off or hover vertically. Often during the takeoff, the rotor is also given an initial power to increase the lift of the rotor. The rotor can be used to make approximately vertical landing.

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