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).
Trial of bronze tappet guides to address a camshaft squeak.
| Identifier | ExFiles\Box 13\2\ 02-page058 | |
| Date | 6th November 1929 | |
| X7090 By.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} c. Mr. X. WOP. Hs{Lord Ernest Hives - Chair}4/AD6.11.29. RE : CAMSHAFT SQUEAK. We have tried a set of tappet guides made in bronze. There is no difference in the metallic ring when the engine is running than with the cast iron guides. The smooth finish that is obtained with bronze is very helpful and a quieter tappet is obtained, but does not do away with the squeak without, as previously reported, the bottom of the tappet is finished off smoothly. We do not advocate using bronze, until such times that we find the cast iron guides cannot be produced to the requirements needed for quietness. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} | ||