What is autorotation in helicopter flight?

Autorotation is a crucial maneuver used in helicopter flight, particularly in situations where the engine fails or loses power. During autorotation, the pilot allows the rotor blades to turn freely in the airstream while descending, which generates lift despite the engine being off. This technique enables the helicopter to descend safely and controlably to the ground, allowing for an emergency landing without the need for engine power.

The ability to perform autorotation is vital for helicopter safety. It ensures that pilots can manage power loss effectively, maintain control of the aircraft, and increase the likelihood of a safe touchdown. By employing the principles of autorotation, pilots can utilize the airflow to keep the rotor blades turning, thereby maintaining lift and glide capability as they descend.

This understanding of autorotation not only underlines its importance in emergency procedures but also highlights the unique handling characteristics of helicopters compared to fixed-wing aircraft.