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).
Proposing a test on an engine fitted with double valve springs.
| Identifier | ExFiles\Box 158\5\ scan0010 | |
| Date | 8th February 1939 | |
| 1360 To Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} from Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} Rm.{William Robotham - Chief Engineer}5/MH.{M. Huckerby}8.2.39. DOUBLE VALVE SPRINGS. We should like to arrange a test of an engine fitted with double valve springs to see if when a spring breaks the customer will realise that something is wrong, or alternatively continue to drive in the ordinary way until the second spring breaks. (on the road). Rm.{William Robotham - Chief Engineer} | ||