"Supermarine Type 556
Developed in March 1954, the Supermarine Type 556 two-seater all-weather fighter was one of the developments in a series of projects for the second generation of Scimitar carrier-based fighters. The new aircraft, which was Supermarine's response to the Ministry's new February 17th specification, was to be either a pure missile fighter or a cannon-missile fighter. In the first case, it had to carry two Red Dean air-to-air missiles or four Blue Jays. In the second case, its armament was to consist of four cannons or a combination of Blue Jay missiles and cannons.
The thick nose of the fuselage made it possible to place the crew members side by side and to install the AI.18 radar with a large antenna diameter on board the aircraft. A wider cockpit made it possible to rotate the engines relative to the central axis of the aircraft and place some of the equipment between the compressors and engine air intakes.
Supermarine considered the Type 556 to meet the NR / A.38 specification in terms of speed, rate of climb and ceiling. In September 1954, as part of work on the NR / A.38 specification, one Type 556 prototype was ordered, but in April of the following year, after the manufacture of the layout, the work was suspended, and in July it was decided to abandon the Supermarine machine in favor of the carrier fighter-interceptor de Havilland DH.110 Sea Vixen.
FLIGHT TECHNICAL CHARACTERISTICS
Type: Supermarine Type 556
Purpose: carrier-based all-weather fighter
Crew: 2 people.
Powerplant: two turbojet engines Avon RA.24
wingspan 37.17 ft (11.3 m)
length 58.5 ft (17.8 m)
wing area 478 sq. ft (44.5 m²)
maximum take-off (in the version of a long-range fighter with two guns, two PTBs and two Blue Jay missiles) 41 852 lbs (18 984 kg)
maximum speed (afterburner)
• at sea level 766 mph (1,232 km / h)
• at an altitude of 40,000 feet (12,192 m) 690 mph (1110 km / h)
rate of climb at sea level 43,600 fpm (221.5 m / s)
service ceiling 52,150 ft (15,895 m)"