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).
Letter to a supplier regarding the failure of two 20 HP front springs during testing, requesting their opinion and replacement.
| Identifier | ExFiles\Box 52\2\ Scan236 | |
| Date | 10th July 1930 | |
| XU429 Expl. Dept. Hs {Lord Ernest Hives - Chair} /Rn. {Mr Robinson} 3/MJ. July 10th,1930. Messrs. Thomas Firth & Sons, Ltd., Norfolk Works, SHEFFIELD. Dear Sirs, You recently made us two 20 HP. front springs with a free camber of 5", normal loaded camber of 1" positive. We subjected these springs to our normal test and one spring which has broken up failed after 23 hours running. The other spring ran 44 hours with only a fracture of the bottom plate. From the appearance of the broken main leaf we should say that the material is at fault and should like your opinion on it. At the same time we should like you to replace the broken plates and return the springs to us at your earliest convenience. Yours faithfully, For Rolls-Royce Ltd. | ||