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).
Heating tests on dynamos and the development of a dynamo for the Goshawk engine.
| Identifier | ExFiles\Box 39\2\ Scan037 | |
| Date | 13th December 1920 | |
| To R.{Sir Henry Royce} from EFC. c. CJ. c. E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} X3533 EFC3/T13.12.20. X.1402. - EXTERNAL VOLTAGE (OR CURRENT) REGULATORS X.294. FOR SHUNT WOUND DYNAMOS. We have been carrying out some heating tests on dynamos, both controlled and shunt wound, on the lines suggested by you in your R2/G19.8.19, i.e. we are causing the machines to run at constant volt and ampere output, the voltage being controlled to exactitude by means of a low variable carbon resistance in series with the battery, the amperes being controlled in the usual way by regulating the speed of the driving motor. We shall shortly be able to put these results before you, and now that we have accumulated considerable information on the performance of such dynamos as we have, either controlled or shunt wound, we have taken up the investigation of the various voltage or current regulators available. X.3533. With regard to the dynamo for the Goshawk, we have recently been concentrating on this work as decided, and the dynamo is well under way, but we have to consider the control of this machine. Some time ago you will remember you said in your R8/G25.6.20, that you would have set out a design of vibrator regulator and combined cutout. I do not knowe whether this was in your mind for the R.R. dynamo made from starter motor parts or for the Goshawk dynamo, or for both, but we should like to hear from you as to any decision you have come to with regard to the control of this Goshawk dynamo. EFC | ||