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).
Instructions for the Goshawk electrical system, specifically regarding when to disconnect the exciting wire from the dynamo.
| Identifier | ExFiles\Box 51\2\ Scan136 | |
| Date | 17th August 1923 | |
| X4338 To R. {Sir Henry Royce} from EFC. {E. Fowler Clarke - Electrical Engineer} c. to GJ. c. to By. {R.W. Bailey - Chief Engineer} c. to By {R.W. Bailey - Chief Engineer} /NHW. EFC {E. Fowler Clarke - Electrical Engineer} 3/T17.8.23. X.4338 - GOSHAWK ELECTRICAL SYSTEM. Further to our EFC {E. Fowler Clarke - Electrical Engineer} 3/T14.8.23. we feel that it is unnecessary, and perhaps even undesirable, to say that the exciting wire should be removed from the dynamo when the battery is "OUT OF ORDER OR DISCONNECTED" We think we can take it for granted that in 95% of the cases disconnection and removal of the battery are synonymous. Also, so long as failure of the battery is not a case of a broken lug or a case in which the electrolyte is all dried away, the battery, even if out of order from a capacity point of view, should be left connected with the object of controlling the system. We feel that such cases of discontinuity of circuit through the battery will be so few and far between as to be better ignored and the warning merely to say that the exciting wire should be detached when the battery is "REMOVED FROM THE CHASSIS". It is pointed out that if a man considers his battery to be out of order he may (in carrying out the at present proposed instructions) disconnect the exciting wire from the dynamo when it had really better be left connected, and unless in this case the instruction would also include the removal of fuse No.3 in the battery igni circuit, the battery may be put further out of order by Contd. | ||