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).
Particulars of a camshaft and valve spring.
| Identifier | WestWitteringFiles\T\March1929-December1929\ Scan238 | |
| Date | 4th November 1929 guessed | |
| (2) ORIGINAL We find that we sent you particulars of the camshaft and valve spring 12 months ago, probably in conjunction with 'Japan' - LeC. 2610/II. respectively - which give you the camshaft and valve spring you should have tested. We spent a lot of time on these parts. The new spring in combination with the longer exhaust cam should put up the jumping speed approximately 20%. R.{Sir Henry Royce} MADE AT CROXLEY 1804 | ||