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).
The specifications for double valve springs for the Phantom II model.
| Identifier | ExFiles\Box 17\6\ Scan312 | |
| Date | 18th September 1934 | |
| 47060 To E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Smth.19/KW.18.9.34. Valve Springs for Ph.II. Ref: Hs{Lord Ernest Hives - Chair}/Smth.18/KW.6.9.34. We understand that it is impossible to give us single springs with the seat loads asked for in the above memo. without at the same time having excessive ratings. In view of this we should like double springs with the required characteristics. The ratings should be if possible within 15 lbs/inch on the high side of those asked for. We should like these springs as soon as possible since the head will be ready for test within the next few days. Hs{Lord Ernest Hives - Chair}/F.LL.Smith. | ||