After testing himself the X-13 Vertijet Ryan, test pilot Peter Girard thought bigger and came to the idea of a vertical take-off and landing (VTOL) jet fighter. He conceived a sort of triangular shaped rotor/wing with movable tips. To counteract the rotor torque he planned to employ compressed air in the tail section. The wing rotated to take off like an helicopter and when the appropriate speed was achieve it became fixed to allow high-speed flight.
In 1962 Lockheed and Ryan found some merit in the idea…and in what’s better than Lockheed’s already stunning “Zip”?. It didn’t go further.
In this photo a lovely done interpretation. It could have been this cool.