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).
Inquiry about the status of experiments on steel wheels for front wheel brakes, specifically the 'bumping' test.
| Identifier | ExFiles\Box 53\3\ Scan186 | |
| Date | 26th January 1925 | |
| S/W X.4586 C4/C26.1.25. Steel Wheels suitable for Front Wheel Brakes. ------ We shall be glad to know how this matter now stands, and whether you have been able to pass the steel wheels after your experiments on the "bumping" test. C. | ||