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).
EAC.10 valve gear, suggesting duralumin for the rocker bar supports and noting thermal expansion effects.
| Identifier | ExFiles\Box 17\6\ Scan024 | |
| Date | 2nd February 1928 | |
| R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} c. to BJ. BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair} X. 7060 E3/M23. 2. 28. EAC.10 VALVE GEAR. We send herewith blueprint of LeC.2514 shewing remainder of information for the above. We are suggesting that the rocker bar supports can be made in duralumin. There is a difference of expansion between the steel rocker bars and the alum. cyl. head when the engine warms up amounting to about .006" maximum on each end of the bars, but we have this effect now on EAC.14., and it appears to cause no harm. E.{Mr Elliott - Chief Engineer} | ||