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 discrepancy between flywheel markings and actual engine valve timings for EAC valves and fittings.
| Identifier | ExFiles\Box 66a\2\ scan0002 | |
| Date | 14th January 1925 | |
| COPY. X8060 To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG.14.1.25. EAC. VALVES & FITTINGS. We find that the markings on the EAC flywheel do not correspond with the valve timings (-.010 Clce) required for maximum power. In point of fact no overlap is shewn between exhaust closing and opening. The average of all the valve timings which we have obtained from engines on test, are:- I.O. 2.3 A.T.D.C. I.C. 42.5 A.B.D.C. E.O. 48 B.B.D.C. E.C. 8.9 A.T.D.C. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||