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).
Pros and cons of increasing dynamo output to meet higher electrical demands on cars.
| Identifier | ExFiles\Box 68\4\ scan0137 | |
| Date | 1st February 1929 | |
| x8864 PN.{Mr Northey}1/WTL.2.29. S/W. EFC...from PN.{Mr Northey} Copy to Sg{Arthur F. Sidgreaves - MD} Ox. CWB. Wer DYNAMO OUTPUT. In reply to your EFC3/T30.1.29, it would appear fairly clear that as there is a tendency always to increase the demand for electric current on a car, and not to decrease the amount, unless we arrange that the dynamo shall have a greater output we are likely to have more trouble from batteries getting insufficient charge. The more powerful dynamos which we have available for supply in case of special demand, at present, have the disadvantage of getting in at about 200 revs. higher speed; a point which could be got over I understand by increasing the weight of the machine by only 9 lbs. My feeling is that the importance of being able to use really adequate headlamps without any other disadvantage would certainly justify an addition of weight in the neighbourhood of 9 lbs., in which case it would appear to be desirable to fit these more powerful dynamos on both models in future unless there is any serious disadvantage which you would like to discuss. This proposition of course would be in connection with the green light warning. It is no use discussing the more complicated automatic full control as R.{Sir Henry Royce} is not in favour of complication. PN.{Mr Northey} Wrd | ||