Cierva C.29

The Cierva C.29 was a five-seat British cabin autogyro built in 1934 as a joint venture between Westland Aircraft and the Cierva company. Cierva designed the rotor system and the rotors, while Westland designed the fuselage. A single 600 horsepower Armstrong Siddeley Panther II engine, fitted with a two-bladed tractor propeller, also drove the three-bladed rotor through a clutched shaft. The aircraft suffered from ground resonance during ground running and was never flown. The Royal Aircraft Establishment later acquired it for evaluation but could not cure the resonance problem, and the autogyro was scrapped in 1939.