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).
Design change to the valve gear cams, increasing their width for improved wear and lubrication.
| Identifier | ExFiles\Box 17\6\ Scan051 | |
| Date | 25th July 1928 | |
| BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to BJ. Hs.{Lord Ernest Hives - Chair} X7060 E2/M25.7.28. EAC.10 VALVE GEAR. X.7060 X.7090 BY/CGH{W Clough}7/K19.7.28. Re. Lec.2464, and in reply to your memo. we wish to make the cams .700 wide instead of .5. This transfers the bearing surface overlap to the cam, and increases the wearing face, and we believe also improves the lubrication. The question of grinding the end cam near the collar requires looking into, but we believe you will find it possible to accommodate the wider cam at this point. E.{Mr Elliott - Chief Engineer} | ||