Vickers 725 Red Rapier

By cancellation the Vickers 825 had reached prototype stage. The 825 was a 13 m long missile with a 10 m wingspan made from welded and formed mild steel sections. The fuselage was rolled steel and the wing sheet steel over box spars. The wing served as the fuel tank. The three Soar engines were used, two on the tips of the tailplane, and one on the tip of the fin. The leading edges of the tailplane and fin were swept back sharply, but the wing was straight, and held to the fuselage by bombslips. The warhead, on 5000lb bomb (or 5 1,000lb bombs scattered laterally), was held to the front of the fuselage by explosive bolts. In use, the wing was jettisoned at the target, and the warhead detached once the fuselage had stabilised in a dive and the altitude came below the Radar Horizon (20,000ft at 400 n.m. from its launch position). After initial guidance by flux gate compass and vertical reference, guidance was by the 'TRAMP' sysem of pulses transmitted from two ground Radar Stations, producing target position as the intersection of two range measurements. Guidance accuracy at a 400n.m range target was specified as 100 yards CEP. One-third scale models without engines were built and air launched from a Washington bomber (the Boeing B-29 Superfortress in RAF service) on the Woomera missile range to test the aerodynamics and autopilot operation.

Cruising at Mach 0.83 at 50,000ft., intercepting Red Rapier required Surface to Air guided weapons. This is in contrast to the wartime V1, which flew at low altitude and could be intercepted by existing fighter aircraft.

Source; Wikipedia