Wallis WA-120
The Wallis WA-120 is an experimental British autogyro developed by Ken Wallis. Design and development. Following on from his family of single-seat autogyros former Royal Air Force aviator Wing Commander Ken Wallis developed a high-performance long-range variant with an enclosed cockpit. The WA-120, registered "G-AYVO", was first flown on 13 June 1971. The autogyro is powered by a Rolls-Royce Continental O-240-A piston engine driving a four-bladed pusher propeller.