Diagrams showing two methods for the attachment of a U bolt to mainsprings.
| Identifier | ExFiles\Box 118\3\ scan0058 | |
| Date | 8th February 1938 guessed | |
| 1023 NOTE POSITION OF SPLIT PIN, AND EXCESS LENGTH OF 'U' BOLT. VIEW SHEWING ATTACHMENT OF 'U' BOLT TO MAINSPRINGS AS PER SAMPLE BUMPER. VIEW SHEWING ATTACHMENT OF 'U' BOLT TO MAINSPRINGS, PREFERRED BY R.R.LTD. | ||
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).