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).
Valve spring performance and noise issues on Phantom engines with turbulent heads.
| Identifier | ExFiles\Box 17\6\ Scan039 | |
| Date | 1st May 1928 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} x7060 PHANTOM - VALVE SPRINGS. Hs{Lord Ernest Hives - Chair}4/LG11.5.28. x8060 x290 The first engines being produced with the turbulent head are instructed with standard single type valve springs. We have had comparatively very little trouble with these springs. The valve clicking noise has been consistent on 5 or 6 engines to which the double springs have been fitted. Hs.{Lord Ernest Hives - Chair} | ||