What is another word for auto-giro?
Pronunciation: [ˈɔːtə͡ʊd͡ʒˈa͡ɪɹə͡ʊ] (IPA) 
Auto-giro, also known as autogyro or gyroplane, is a type of aircraft that has a rotor like a helicopter but without an engine powering it. Synonyms for this word include rotorcraft, rotary-wing aircraft, and gyrocopter. The term gyroplane is commonly used in Europe, while the term autogyro is more commonly used in North America. Some people may also refer to an autogyro as a gyroplane, gyroglider, or gyroship. These terms are all interchangeable and describe the same type of aircraft. The auto-giro was invented in 1923 by Spanish engineer Juan de la Cierva, and has been used for various purposes including military reconnaissance, airmail services, and personal aviation.
