Modification to E.A.C. engine tappets to resolve a sticking issue and an attached horsepower comparison for various carburetters.
| Identifier | ExFiles\Box 72\4\ scan0048 | |
| Date | 3rd October 1923 | |
| To R. {Sir Henry Royce} from Hs. {Lord Ernest Hives - Chair} c. to CJ. c. to E. {Mr Elliott - Chief Engineer} SECRET. X9770 Hs {Lord Ernest Hives - Chair} 1/L.H.3.10.23. E.A.C. ENGINE. X9770/X9060 Since we have modified the tappets so that they pull down on to a collar, we have had no further trouble with the tappets sticking. We found on dismantling that 2 exhaust valves were destroyed - no doubt caused by the tappets sticking. We attach to R's copy of this note a curve showing comparative HP. obtained with the engine fitted with a Claudel Carburetter, E.A.C. carburetter, and White Knave(1908 R.A.C. International Touring Car Trial) type 40/50 carburetter. Hs. {Lord Ernest Hives - Chair} | ||
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).