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).
Improvements to the vehicle's electrical field circuit and dynamo output for battery charging.
| Identifier | ExFiles\Box 163\6\ img040 | |
| Date | 6th May 1930 | |
| R1/M6.5.30 contd. -2- Undoubtedly the extra resistance should be in the field circuit, and the arrangement as far as I have examined it has resulted in better than present standard, with very little trouble of expense or extra parts. Though this will be a great improvement, making some allowance between summer and winter, much daylight and night work, and also saving the battery from heavy charging current and in some case overcharging, we still require some more satisfactory way of knowing the state of the battery charge, and in some cases a garage charging equipment, of which I have not yet seen a model. The problem is quite simple when continuous current is available, but when alternate current is used for lighting the garage a rectifier is needed. The charge could be a very small one for a long period (dribbling charge), or if more convenient say about half normal for a few hours while cleaning the car. If I remember rightly our switchbox connection socket is arranged so that the polarity of the charge cannot get wrongly connected by the plug - i.e. the poles are marked and one leg is larger than the other. I agree to go ahead with increased dynamo output when headlights switched on, and much more constant dynamo output with speed. R.{Sir Henry Royce} | ||