What is "Autorotation" in the context of helicopter flight?

• A. A method for enhancing speed during flight
• B. A technique allowing a helicopter to land safely in the event of engine failure
• C. A procedure for gaining altitude without engine power
• D. A maneuver for turning during a flight

Answer: (B)

Autorotation refers to a technique in helicopter flight that allows the aircraft to land safely in the event of an engine failure. During autorotation, the pilot can transition from powered flight to a free-fall descent while maintaining control over the helicopter's descent rate and glide path. This is achieved by adjusting the pitch of the rotor blades, allowing them to spin freely and generate lift from the airstream flowing upward through the rotor system as the helicopter descends.

The ability to perform autorotation is critical for safety, as it means that a helicopter can still land safely in emergencies, even when power from the engine is lost. Understanding and mastering autorotation is a fundamental skill for helicopter pilots, as it provides a means to manage the helicopter's descent during an unforeseen loss of power.

The other options do not accurately define autorotation. Enhancing speed during flight, gaining altitude without engine power, and executing maneuvers for turning do not capture the essence of the ability to control a safe landing without engine power, which is the core of autorotation.