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).
Brief note on investigations into valve spring materials, specifically hard-drawn piano wire and carbon steel wire.
| Identifier | ExFiles\Box 93\5\ scan0036 | |
| Date | 12th November 1936 | |
| Liles C.Rm.{William Robotham - Chief Engineer} Swdll 1152 Any comments? BY.11/J.12.11.36. Rm{William Robotham - Chief Engineer} VALVE SPRING MATERIALS. I attach hereto for your information, some brief notes in regard to valve spring materials as far as our investigations have gone up to the present time. You will see that we are in touch with Messrs. Fox & Co, Limited, with a view to improving the production of hard drawn piano wire, and we are also discussing with this firm and also with the Swedish people the possibility of producing carbon steel wire heat treated in the coil. Either of these materials appear to have possibilities providing we can reduce the stress of our springs to within the limits of such materials. BY.{R.W. Bailey - Chief Engineer} | ||