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).
Examination of various dynamos and their brushes after completing specific mileages.
| Identifier | WestWitteringFiles\L\Jan1924-March1924\ Scan149 | |
| Date | 17th March 1924 | |
| Contd. -2- EPCL/17.3.24. The brushes on dynamos A and D were of the same standard Z material. The brushes on dynamos R3 and 470 were EG2 and EGO Morganite material respectively. After certain periods of running an examination in situ was made of the commutator and brush gear of each of these four machines, the machines A, D,470 and R3 having respectively done 1120, 2460,5303 and 3923 miles on their respective chassis. The results of this examination are contained in my assistant's report AB.97 attached, dated 7.1.24. At that time it was decided to allow each of these dynamos to complete 5,000 miles, after which it was taken off the chassis for more critical examination. The first one to be removed was 470 from 6GII, after completing 6644 miles, and the report on the commutation of this is contained in AB.99 of 21.1.24, attached. The second machine to be removed was dynamo R3 from 7GII, after covering 5419 miles -see AB.102 of 7.2.24 herewith. Lastly, dynamo D from 4GII has recently been removed having done 5513 miles, and the results of the examination of this machine are contained in AC.2 of 4.3.24 attached. The additional mileage done by dynamo A on 2GII since the examination in situ has not been sufficient to render further examination of value. Accordingly there is no report in this case. Contd. | ||