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).
Technical assessment of Springfield electrical equipment, including Westinghouse and American Bosch components.
| Identifier | WestWitteringFiles\K\October1923\ Scan40 | |
| Date | 8th October 1923 | |
| To R.{Sir Henry Royce} from EPC. c. CJ. EFC4/T8.10.23. ORIGINAL RE SPRINGFIELD ELECTRICAL EQUIPMENT. X3966 X4276 Answering your M.2/M20.9.23. (1) Without at the moment going into all the pros and cons, which I do not feel you desire, we are inclined to consider that the balance is slightly in favour of 6-volt systems, though we do not think there is a great deal in it. (2) As regards the Westinghouse dynamo, apart from the regulator, we think this satisfactory and sufficient and probably quite reliable. As regards the vibrator regulator, we see no reason why this might not be reasonably reliable, but we do not consider it entirely satisfactory and sufficient from the point of view of causing the dynamo to give a supply of current reasonably in accordance with the demand. It is true that as arranged the vibrator regulator ceases to function at quite a moderate speed, above which the current will rise, the machine behaving as a plain shunt machine with an abnormal amount of resistance in its field circuit; The Westinghouse people would probably argue that divisions from the ideal condition are necessary to achieve the perhaps more important feature of reliability, but we are of the opinion that the apparatus does not represent the last word of what might be done in combining reliability and the other desirable features. The Westinghouse dynamo and vibrator regulator which we had for examination and test was 12 volt. (3) We have not seen a sample of the latest Westinghouse switch that Springfield are using, but will obtaine Hy{Tom Haldenby - Plant Engineer}'s opinion of this on his return. (a) As regards the American Bosch battery ignition, contact breaker and distributor, we see no reason why this should not be considered reliable. As regards the coil, however, we do not quite like the spring pressure connections for the primary current. EFC. | ||