Rolls-Royce R engine was invaluable in the subsequent development of the Rolls-Royce Merlin engine and the Spitfire. A de-rated R engine, known as the Griffon, was tested in 1933, but it was not directly related to the production Rolls-Royce Griffon of 1939, of the same exact bore/stroke and resultant displacement figures as the "R" design. Three examples of the R engine are on public display in British museums as of 2014. Rolls-Royce realised that the Napier Lion engine used in the 1927 Supermarine S.5 Schneider Trophy winner had reached the peak of its development, and that for Britain's entrant in the next
Rolls-Royce Limited Rolls-Royce Limited Rolls-Royce was a British luxury car and later an aero engine manufacturing business established in 1904 by the partnership of Charles Rolls and Henry Royce. Building on Royce's reputation established with his cranes they quickly developed a reputation for superior engineering by manufacturing the "best car in the world". The First World War brought them into manufacturing aero engines. Joint development of jet engines began in 1940 and they entered production. Rolls-Royce has built an enduring reputation for development and manufacture of engines for defence and civil aircraft. In the late 1960s Rolls-Royce became hopelessly crippled by its