Answer: autogiro

AnswerCrossword Clue
AUTOGIROKind of aircraft.
AUTOGIROCertain aircraft
AUTOGIROHelicopter's predecessor
AUTOGIRO1920 aeronautical invention
AUTOGIROCousin of a helicopter
AUTOGIROEarly rotorcraft
AUTOGIROAircraft with a rotor
autogiroa type of aircraft, also AUTOGYRO
autogiroaircraft with an unpowered, horizontally rotating propeller on a shaft above the fuselage that provides lift for the machine, with forward propulsion being provided by a conventional propeller: superseded in most applications by the helicopter