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).
Electrical system for the 'Goshawk', specifically the arrangement of dynamo circuits and switches.
| Identifier | ExFiles\Box 51\2\ Scan031 | |
| Date | 2nd November 1921 | |
| X4338 To Da. {Bernard Day - Chassis Design} from EFC. {E. Fowler Clarke - Electrical Engineer} c. to EY/WER. EFC {E. Fowler Clarke - Electrical Engineer} 3/T2.11.21. X.4338 - "GOSHAWK" ELECTRICAL SYSTEM. I have not received any remarks in answer to my EFC {E. Fowler Clarke - Electrical Engineer} 3/T19.9.21 regarding the arrangement of electrical circuits for the Goshawk but I trust that you and Mr. Royce received your copies of this note. Another point now in my mind is that with the arrangement as schemed, when the dynamo switch is on and the car stopped, all the dynamo windings are alive. This results from having an automatic in the earthing connection of the dynamo. Probably this is not considered to be very important as the switch can be pulled off when work is to be done to the dynamo. It cannot very well be avoided so long as the dynamo switch is also the ignition switch as arranged, because this would not allow the cutout to be placed in the supply wire from the switch. I do not think there is much objection to this feature, though one would think it would have been better to have all these switches, including the automatic, on the "live" side. Re the LeC. of the new distribution board with contained automatic switch, it is a little difficult to see just how the connections run, but we note that you have arranged for one end of the series coil to be earthed. Would not it be better to have the series coil insulated and one of the contacts earthed, as it is a matter of indifference | ||