Saunders-Roe SR.53

The Saunders-Roe SR.53 was a prototype interceptor aircraft of mixed jet and rocket propulsion developed for the Royal Air Force in the early 1950s.
Although its performance was promising, the need for such an aircraft was soon overtaken by surface-to-air missile development, and the project was canceled after forty-two test flights.

General characteristics
* Crew: One, pilot
* Length: 45 ft (13.72 m)
* Wingspan: 25 ft 1 in (7.65 m)
* Height: 10 ft 10 in (3.30 m)
* Wing area: 274 ft² (25.45 m²)
* Empty weight: 6,635 lb (3,016 kg)
* Loaded weight: 18,361 lb (8,346 kg)
* Powerplant:
o 1× Armstrong Siddeley Viper 8 turbojet, 1,640 lb (7.3 kN)
o 1× de Havilland Spectre rocket, 8,000 lbf (35.7 kN)

Performance
* Maximum speed: M2.35 (1,334 mph/2,135 km/h)
* Service ceiling 67,000 ft (20420 m)
* Rate of climb: 24,000 ft/min (7,317 m/min)
* Wing loading: 67 lb/ft² (328 kg/m²)
* Thrust/weight (jet): 1:2
* Endurance at full power: 7 minutes