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).
Comparison of standard and 'R' type cam followers, detailing their effect on valve timing, power, and Mean Effective Pressure.
| Identifier | ExFiles\Box 85\4\ scan0098 | |
| Date | 7th September 1934 guessed | |
| -3- Curve B.V.58 shews a comparison of the standard cam followers and the followers used for the cam shaft recently used having "R" engine cam forms. The radius of the "R" followers is larger than the standard followers so that the valve timing was altered somewhat giving a longer duration and more overlap. No increase in power was measured at the high speeds but as expected from the valve timing diagram the low speed M.E.P. was much lower than with the standard followers. Attached are curves B.V.53, 54, 55, 56, 57 & 58. Hs{Lord Ernest Hives - Chair}/R.Matthews. | ||