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).
Testing double valve springs and requesting a set be fitted to an engine.
| Identifier | ExFiles\Box 56\2\ Scan120 | |
| Date | 8th August 1932 | |
| Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} x290 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/ADL6.8.32. We have now tested out a set of double valve springs on 19-EX which were free from the objectionable surging period. There are two more sets of these springs in the Stores. We should be glad if you could have one set fitted to 20-EX as soon as convenient. The Piece No. of the springs is Hs.{Lord Ernest Hives - Chair}664/665. leC.3136. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||