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).
Drawing of Bentley double valve springs.
| Identifier | ExFiles\Box 88\4\ scan0106 | |
| Date | 6th September 1934 | |
| Hs{Lord Ernest Hives - Chair} 1498 EB 509 EB 508 1.475 1.300 EB 510 MODIFIED OUTER VALVE SPRING, AS EB507 BUT WITH FREE LENGTH OF 1.800 BENTLEY - DOUBLE VALVE SPRINGS ROLLS-ROYCE, LTD PRINT ROOM 6 SEP 1934 DERBY F.{Mr Friese} H.{Arthur M. Hanbury - Head Complaints} Smith 6. IX. 34 | ||