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).
Engine valve train components, including cam and follower hardness, lubrication, and spring pressure.
| Identifier | ExFiles\Box 17\6\ Scan062 | |
| Date | 13th November 1928 guessed | |
| contd :- -2- The hardness of the cam and the follower surface should be carefully examined; so often we find decarbonisation of the skin caused by imperfect hardness and grinding. This is a part where we might try the nitrofied steel and every effort should be made to get parts made in this material as soon as possible. Lubrication. When we increase the spray from the crankshaft it will also allow more oil to return on to the camshaft and made reduce this trouble. It is also possible to arrange for the tappet chambers to be flooded with oil. E.{Mr Elliott - Chief Engineer} will send a sketch. The longer duration camshaft will enable us to use less spring pressure on the follower. Remember that the follower spring cannot help push rods, rockers or valve so xxx that any pressure above the required amount is detrimental. Hs.{Lord Ernest Hives - Chair} | ||