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).
Status of coiling differentially-coiled valve springs, awaiting material from Sweden.
| Identifier | ExFiles\Box 158\4\ scan0119 | |
| Date | 30th January 1937 | |
| Side SWDC ?1360. Rm.{William Robotham - Chief Engineer} BY/Cgh.{W Clough}5/W.30.1.37. Chassis : Valve Springs. In reply to Rm.{William Robotham - Chief Engineer}19/R.28.1.37, everything is ready for coiling the differentially-coiled valve springs immediately we receive material from Sweden, which we expected to be delivered this week. However, we are taking the matter up with a view to urging same. BY/Cgh.{W Clough} | ||