autogyroers

An autogyro, also known as a gyroplane or autogyrocopter, is a type of rotorcraft that uses an unpowered rotor in autorotation to develop lift and a powered propeller, typically mounted at the rear, to provide thrust. Unlike a helicopter, the rotor blades of an autogyro are not driven by an engine. Instead, they are allowed to spin freely as air passes through them during forward motion. This characteristic distinguishes it from other rotorcraft and gives it unique flight properties.

The concept of the autogyro was first developed by the Spanish engineer Juan de la Cierva in the early 20th century. His early designs aimed to overcome the limitations of fixed-wing aircraft, particularly their inability to take off and land in short distances and their tendency to stall. The autogyro offered a solution by providing vertical lift without the complex mechanics of a powered rotor. The first successful flight of a de la Cierva autogyro occurred in 1923.

Autogyros typically have a lower minimum airspeed than fixed-wing aircraft and can land in very short spaces. They are not capable of vertical takeoff or hover like helicopters because the rotor is not powered. The lift is generated by the relative wind passing through the rotor disc as the aircraft moves forward. This makes them generally simpler to operate and more stable in turbulent air compared to some other aircraft. Autogyros are often used for recreational flying, aerial observation, and light surveillance due to their safety features and operational flexibility.