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).
Experimental record sheet for Morganite Brushes, tracking mileage and observations.
| Identifier | ExFiles\Box 62\3\ scan0254 | |
| Date | 28th August 1930 | |
| X6066 ELECTRICAL EXPERIMENTAL RECORD SHEETS. Date:- 28 - 8 - 30 . X.8673. Morganite Brushes. H.M.6. Date on. | Location. | Date off. | REMARKS. | Miles reading START. | Miles reading finish. | Miles covered | Total miles. 28 - 8 - 30 | 22 Ex | 15 - 9 - 30 | Fitted to 1.2.4S.HO. | 29,690 | 29,781 | 91 | 91 15 - 9 - 30 | " | 3 - 10 - 30 | Comm skimmed. Springs O.K. | 29,781 | 30,023 | 242 | 333 3 - 10 - 30 | " | 11 - 10 - 30 | Speedometer changed | 30,023 | 30,348 | 325 | 658 11 - 10 - 30 | " | 1 - 11 - 30 | Reading taken. | 402 | 1,787 | 1,385 | 2,043 1 - 11 - 30 | " | 1 - 12 - 30 | " | 1,787 | 2,774 | 987 | 3,030 1 - 12 - 30 | " | 1 - 1 - 31 | " | 2,774 | 3,960 | 1,186 | 4,216 1 - 1 - 31 | " | 4 - 2 - 31 | " " No blackening on commutator. | 3,960 | 5,178 | 1,218 | 5,434 4 - 2 - 31 | " | 2 - 3 - 31 | Reading taken. | 5,178 | 6,035 | 857 | 6,291 2 - 3 - 31 | " | 13 - 4 - 31 | " | 6,035 | 8,916 | 2,881 | 9,172 13 - 4 - 31 | " | 1 - 5 - 31 | " | 8,916 | 10,137 | 1,221 | 10,393 1 - 5 - 31 | " | 5 - 6 - 31 | " | 10,137 | 11,895 | 1,758 | 12,151 5 - 6 - 31 | " | 4 - 7 - 31 | " | 11,895 | 13,701 | 1,806 | 13,957 4 - 7 - 31 | " | 20 - 7 - 31 | Dynamo removed. | 13,701 | 14,280 | 579 | 14,536 | ||