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).
Suggesting a comparative test of tapered versus parallel valve springs to assess superiority for periodic vibrations.
| Identifier | WestWitteringFiles\T\March1929-December1929\ Scan045 | |
| Date | 25th March 1929 | |
| HS.{Lord Ernest Hives - Chair} ) FROM R.{Sir Henry Royce} Br.{T. E. Bellringer - Repair Manager} ) (At Le CanadelHenry Royce's French residence.) C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} ORIGINAL R9/M25.3.29. REC'D AT WW. 28.3.29. VALVE SPRINGS. X290 X.7060 Though we are in a good position as regards these on all our work we have agreed that it would be worth while to make a well tapered spring of exactly the same mean characteristics, and test by examination(while running) and life if these are definitely superior to parallel ones over a wide range of speeds,for periodic vibrations. R.{Sir Henry Royce} | ||