One of two Built. The other was XD151.
Powered by rocket, 8,000 lb deHavilland Spectre, and a 1,640 lb Armstrong Siddeley ASV.8 Viper turbojet. It could not takeoff on the turbojet alone.
First flight was May 16, 1957.
The scond prototype, XD151, was destroyed in a fatal takeoff accident on June 15, 1958.
This photo was taken at Boscombe Down in the spring of 1957.
