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).
Instruction to use magnesium rocker covers for the silent tappet head on the Bentley.
| Identifier | ExFiles\Box 88\4\ scan0129 | |
| Date | 5th February 1935 | |
| To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} <254 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}10/KW.5.2.35. Silent Tappet Head for the Bentley. Will you please instruct magnesium rocker covers for the silent tappet head for the Bentley. We have not been able to use these so far with the ordinary tappets because they transmit sound, but with the silent tappets this trouble no longer exists. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||