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).
The testing of chromium-plated tappets and adjustment schemes for the Phantom III engine.
| Identifier | ExFiles\Box 96\2\ scan0105 | |
| Date | 11th February 1936 | |
| GRY{Shadwell Grylls} x354 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. Wer. By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell} E/JNR.{Charles L. Jenner} E.3/HP.11.2.36. re Phantom III. With reference to memo Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}1/JH.17.1.36, reporting on the test of the tappet holding off scheme LeC.4675, this experiment was primarily made to show if any benefit was to be obtained by only allowing the tappets to contact with the cam during the lifting stroke, and apparently it shows that we shall have to have the chromium plated tappets for this engine, which tappets are giving very good results. With regard to the remarks concerning the adjustment scheme being most impractical, due to each washer having to be specially ground to suit each tappet, it has not been appreciated this was intended to be a shim adjustment so commonly used on American products. E.{Mr Elliott - Chief Engineer} | ||