Rolls-Royce Soar

Soar
Rolls-Royce Soar on display at the Rolls-Royce Heritage Trust, Derby
TypeTurbojet
ManufacturerRolls-Royce Limited
First runJanuary 1953
Developed intoRolls-Royce RB108

The Rolls-Royce RB.93 Soar, also given the Ministry of Supply designation RSr., was a small, expendable British axial-flow turbojet intended for the UB.109T cruise missile use and built by Rolls-Royce Limited in the 1950s and 1960s. Like all the company's gas turbine engines it was named after a British river, in this case, the River Soar. It was also produced under license in the US as the Westinghouse J81.