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 valve gear, suggesting duralumin for rocker bar supports and discussing thermal expansion.
| Identifier | WestWitteringFiles\R\January1928-March1928\ 78 | |
| Date | 2nd February 1928 | |
| R.{Sir Henry Royce} FROM E.{Mr Elliott - Chief Engineer} C. to R.J. BY.{R.W. Bailey - Chief Engineer} HS.{Lord Ernest Hives - Chair} ORIGINAL E3/M23.2.28. EAC.10. VALVE GEAR. X7060 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 aluminium cylinder 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} [Faint circular stamp: RECEIVED] | ||