|Type||Manufacturer|| First run
The Rolls-Royce RB.82 Soar, also given the Ministry of Supply designation RSr., was a small, expendable British axial-flow turbojet intended for cruise missile use and built by Rolls-Royce Limited in the 1950s.
Design and development
The output of the improved RB.93 Soar was 1,750 lbf (7.8 kN). As an expendable device the life of the Soar engines was limited at 10 hours.
It was to be the intended powerplant for the "Red Rapier" missile project one of the projects coming from the UB.109T operational requirement. Red Rapier was to be built by Vickers-Armstrong Ltd, Weybridge, Surrey as the Vickers 825. Development was cancelled in 1953. Three Soar engines were used on this design, two on the tips of the tailplane, and one on the tip of the fin. 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. 
The Soar project was cancelled in March 1965, at a reported total cost of £ 1.2 million.
Specifications (RB.93 Soar)
Data from Gunston
- Type: Single spool turbojet
- Dry weight: 267 lb (121.1 kg)
- Combustors: Annular
- Related development
- Related lists
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