Lift is generated by the main rotor on a helicopter. When the engine or transmission fails, a pilot lands safely by maintaining a forward airspeed, which is an important factor in autorotation, with the use of the collective and cyclic pitch. Optimum airspeed must be reached before autoration is attempted.
Autorotation allows a pilot to control the aircraft's descent to an emergency landing zone. Helicopters are designed so autorotation can be employed manually. A pilot must manage his airspeed through the rotor system that allows him the same amount of control as he would have with full power.
Autorotation is simulated and should be practiced. A pilot performs controlled autorotation by decreasing power to the engine. This simulates the loss of the engine. He then follows the aircraft's procedures for autorotation. A well trained instructor is required to teach autoroation in helicopter training. Understanding the use and procedure for autoration is important before attempting it.
