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).
Electrical experimental record sheet logging mileage for a test on Morganite Brushes.
| Identifier | ExFiles\Box 60\1\ Scan265 | |
| Date | 20th February 1930 | |
| X8673. ELECTRICAL EXPERIMENTAL RECORD SHEETS. Tube:- 20-2-30 X 8673. Morganite Brushes. E.G.O. Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. --- | --- | --- | --- | --- | --- | --- | --- 20-2-30. | Lab. | 12-3-30 | Fitted to M.C. dynamo SS{S. Smith}2 in attempt to solve brush noise problem. Heating test of dynamo. 12-3-30 | 20 Ex | 2-4-30 | Fitted to 20 Ex for 10,000 mile test. | 12,066. | 12,217 | 151 | 151 2-4-30 | " | 2-6-30 | Reading taken. | 12,217 | 13,509 | 1,292 | 1,443 2-6-30 | " | 3-7-30 | Reading taken. | 13,509 | 15,328 | 1,819 | 3,262 3-7-30 | " | 12-8-30 | " " | 15,328 | 17,063 | 1,735 | 4,997 12-8-30 | " | 1-10-30 | " " | 17,063 | 19,449 | 2,386 | 7,383 1-10-30 | " | 8-11-30 | " " | 19,449 | 21,608 | 2,159 | 9,542 8-11-30 | " | 1-12-30 | " " | 21,608 | 22,241 | 633 | 10,175 1-12-30 | " | 11-12-30 | Dynamo removed. | 22,241 | 22,533 | 292 | 10,467 16-12-30. Test completed. | ||