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).
Phantom III front suspension springs, comparing suppliers and analysing the material of a broken spring.
| Identifier | ExFiles\Box 95\3\ scan0192 | |
| Date | 16th December 1935 | |
| X346 To Roy.{Sir Henry Royce} Hs{Lord Ernest Hives - Chair}/Les.12/KW.16.12.35. Phantom III Front Suspension Springs. Re Roy{Sir Henry Royce}/Ms.19/P.11.12.35. Our tests up to date show no difference between the Salter's and the English Steel Corporation's springs. The Firth springs have been inferior. The analysis of a broken Salter's spring shows the material to be Silico-Manganese steel. Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} | ||