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).
Memo discussing difficulties with valve springs and the destructive testing procedures for new batches.
| Identifier | ExFiles\Box 80\3\ scan0159 | |
| Date | 22th August 1918 | |
| Do you think we have quite got over the valve spring difficulty. W.M. dfficulty. Are samples from each batch of springs put through a rapid destructive test before the new subducer springs of that batch are put on chassis. J 3/8. | ||