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).
Power curve showing the effects of silent tappets on the Phantom engine.
| Identifier | ExFiles\Box 17\6\ Scan253 | |
| Date | 21th June 1934 | |
| To E.{Mr Elliott - Chief Engineer} 72060 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}18/KW.21.6.34. Here is a power curve showing how the silent tappets affect the power output of the Phantom engine. Naturally these tappets increase the effective length of the camshaft. Rockers ?? Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||