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).
Schedule of brush and commutator tests on 20 HP dynamos.
| Identifier | ExFiles\Box 50\5\ Scan359 | |
| Date | 26th February 1925 | |
| X4333 EFC {E. Fowler Clarke - Electrical Engineer} /T26.2.25. SCHEDULE OF BRUSH & COMMUTATOR TESTS ON 20 HP. DYNAMOS. (1) 29 Segment annealed copper commutator. This is being run (a) On M dynamo now to come off 7-GII. (b) On R3 dynamo on 3-GII. (2) 29 segment commutator with EG2 Morganite brushes. This is being run on dynamo 470 on 4-GII. (Enquiry sent to E for mileage). (3) Standard. The final test of this has been completed on the bench, see report AC.40 of 9.2.25. (4) 57 segment annealed copper commutator. (a) A final bench test on this has been completed, see report AC.42 of 18.2.25. (b) This is being run on dynamo E on GF.68. (5) 57 segment commutator with EG2 Morganite brushes. (a) Two tests of this have been completed on the bench, one on dynamo E, see AC.25 of 22.10.24, and another on standard dynamo, see AC.32 of 20.11.24. (b) This is being run on dynamo 288 on 5-GII. (c) This is to be run on dynamo D instructed to go on 7-GII. (6) 57 segment commutator with Le Carbone X main and EG.3392 control brushes. (a) Two tests of this have been completed, see AC.26 of 30.9.24 and AC.31 of 10.11.24. (b) It is also being run on F dynamo on 6-GII. (7) 57 segment commutator with Le Carbone LFC2 main and LFC3AB8 control brushes. A test of this has been completed on the bench, see report AC.28 of 8.10.24. EFC. {E. Fowler Clarke - Electrical Engineer} | ||