![]() The success of the autogyro garnered the interest of industrialists and under license from Cierva in the 1920s and 1930s, the Pitcairn & Kellett companies made further innovations. Cierva's autogyro is considered the predecessor of the modern helicopter. The aircraft resembled the fixed-wing aircraft of the day, with a front-mounted engine and propeller. ![]() He first flew one on 9 January 1923, at Cuatro Vientos Airfield in Madrid. The autogyro was invented by Spanish engineer Juan de la Cierva in an attempt to create an aircraft that could fly safely at low speeds. While similar to a helicopter rotor in appearance, the autogyro's rotor must have air flowing across the rotor disc to generate rotation, and the air flows upwards through the rotor disc rather than down. Forward thrust is provided independently, by an engine-driven propeller. A modern, closed-cabin, pusher-propeller autogyro in flightĪn autogyro (from Greek αὐτός and γύρος, "self-turning"), also known as a gyroplane, is a type of rotorcraft that uses an unpowered rotor in free autorotation to develop lift.
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