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).
Performance and potential alternatives for Goshawk dynamo brushes.
| Identifier | ExFiles\Box 51\1\ Scan327 | |
| Date | 9th January 1924 | |
| To BY. {R.W. Bailey - Chief Engineer} from EFC. {E. Fowler Clarke - Electrical Engineer} c. BY {R.W. Bailey - Chief Engineer} /RD. X4383 EFC {E. Fowler Clarke - Electrical Engineer} 9/T9.1.24. X.4333 - GOSHAWKAero EngineCodename for 20HP Car / Aero Engine after KestrelAero Engine DYNAMO BRUSHES. X4383 We now have further evidence, on examination of a set of these brushes running on a dynamo on chassis 7GII, that EG.2 Morganite brushes are satisfactory as an alternative to our standard Z Le Carbone brushes, and as such should be kept in mind in case of failure of supply of Le Carbone. Probably it is not correct to issue a standard-isation sheet in this instance as in that case it would imply that such brushes should be used in parallel with the others, whereas we do think the standard brushes show a slight superiority over these EG.2. Attached is an extract from my assistant's report, which deals with the examination of this particular set of brushes. Careful new year observations of the condition of the brush and commutator gear on our various experimental cars, after running various numbers of miles, further confirms our opinion that our present dynamo, if correctly assembled and used, is a very reliable machine. EFC. {E. Fowler Clarke - Electrical Engineer} | ||