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).
The performance of the auto-charge reducing switch, incorporating customer feedback on the electrical system's behavior.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 95 | |
| Date | 21th March 1927 guessed | |
| -6- Contd. has the rapidly falling characteristic and not the flat characteristic with speed, as in the case of the output reduced by the auto-charge reducing switch. We are now able to quote Mr. Minchin's remarks on the result. He says - "With regard to my car, I must say that I thought the very reduced dynamo output would result in the battery gradually running down, but although the car has been used quite a lot in Town and left standing about with the lights on I cannot see any diminution in the activity of the battery as regards operating the starter on a cold morning or the brightness of the lights and general kick, but I have not made any reliable test as to gravity and volts, etc. but feel perfectly certain that it is in a fully charged condition." It would be possible, utilising the auto-charge reducing switch to set the superior curve of output to a higher value than is suitable for continuous working, because there would be very much less possibility of the dynamo then attaining a high temperature before the auto-switch operates. But in view of this result, it would appear that the present standard output curve is quite sufficient for the superior curve, and as far as we can judge at present, the lower output curve is approximately right for the reduced rate of charge. Altogether the general characteristics of this auto-charge reducing switch appear to us to form an extremely desirable combination, resulting in better conditions generally for dynamo, battery, lamps and other parts of the electrical system. The switches as at present arranged are made up very largely of standard parts. EFC. | ||