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).
Inspection report on a Dynamo R3 after a total mileage of 3923 miles.
| Identifier | ExFiles\Box 50\5\ Scan278 | |
| Date | 7th January 1924 | |
| 1804 Extract from AB.97. 7.1.24. Dynamo R3 on 7GII. Fitted 4.10.23 with EC2 bevelled brushes. run 1457 miles and returned to make positive brush bevelling more effective. Run a further 2466 miles (total miles 3923) brushes very good, well polished commutator fairly good, slightly irregular light brown, probably not yet re-surfaced after machining. The inspection was made with the machine in situ where the control brush is not accessible. EFC/RJA. | ||