From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Optimal angle and placement of a spark plug for improved engine performance.
Identifier | ExFiles\Box 134\2\ scan0010 | |
Date | 11th May 1935 | |
-4- Hs{Lord Ernest Hives - Chair}/Smth.14/KW.11.5.35. In order to miss the rocker cover and yet run into the combustion chamber near the throat (as has been found necessary on the single cylinder unit), the sparking plug will have to be at an angle of some 45° to the combustion chamber roof. This however should be an advantage since the plug points will be more directly in the path of the fresh charge and better slow running should result. The sparking plugs are very accessible on the H.P. head. Hs{Lord Ernest Hives - Chair}/F.Ll.Smith. | ||