How do you land a helicopter without an engine?
Consequently, how much space is needed to land a helicopter?
To begin with, the pilot needs sufficient space to land, with the general rule being about 2 tennis courts' worth of reasonably flat and empty ground, though this varies somewhat depending on the model of helicopter.
One may also ask, what happens if a helicopter stalls?
They accomplish this via autorotation of the main rotor blades. This allows the main rotor to spin without resistance from the engine. Once the engine fails or otherwise is shut off, the pilot must immediately lower the pitch, reducing lift and drag, and the helicopter will begin to descend.
Autorotation is a state of flight in which the main rotor system of a helicopter or similar aircraft turns by the action of air moving up through the rotor, as with an autogyro, rather than engine power driving the rotor. It is the means by which a helicopter can land safely in the event of complete engine failure.