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).
Summary of development work on engine cam forms and followers, noting the performance gains were not worth the risk of valve spring failure.
| Identifier | ExFiles\Box 155\1\ scan0155 | |
| Date | 30th July 1934 guessed | |
| -2- Attached are various curves shewing development work carried out on this engine. Actually it will be seen that with R.{Sir Henry Royce} engine cam forms and .750 radius followers there is a gain of about 2% in intermediate M.E.P. and 5% in top ower, but it was not thought to be worth risking valve spring failure for such a small gain. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} For curves see File 7962. | ||