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).
Performance of the dynamo battery system in relation to driver usage patterns and future development.
| Identifier | ExFiles\Box 165\6\ img247 | |
| Date | 19th December 1929 | |
| X6003 To EFC. from Sg.{Arthur F. Sidgreaves - MD} Copy to Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Ds. PN.{Mr Northey} BY.{R.W. Bailey - Chief Engineer} Sg{Arthur F. Sidgreaves - MD}13/E19.12.29. X.294 X6003 X.8664 X.8665 X.8780. PERFORMANCE OF DYNAMO BATTERY SYSTEM IN RELATION TO DEMAND. I have read your EFC2/AD14.12.29 which is a very interesting technical report on what has been done or might be done in the future in connection with design of generators for our two chassis, but as you have not summarised the position dealt with I am at a loss to ascertain what the recommendations are as to the line you propose we should adopt for the future. There are certain obvious difficulties we have to contend with :- 1. The man who uses his car a lot in the dark, resulting in his battery gradually becoming lower in condition of charge because our dynamo is not able to deal with the load called for by the lighting etc. 2. The man who uses his car a lot in the daylight and has no ready indication when the battery is charged sufficient-ly, and that further charges would be undesirable. R.{Sir Henry Royce} has shown strong disapproval of any system of outside automatic control such as you have advised, because of its complication and the difficulty of finding any fault which might arise, or dealing with any damage when away from one of our Depots, which might be occasioned after an accident to the car. You have also shown that the warming light operated by voltage rise is not good enough or reliable because of variations in the temperature of the whole battery from time to time. I gather from your report that you appear to consider the intermediate output dynamo likely to prove the most useful line of development in the immediate future. Am I right in assuming this? I am aware that any effective method for enabling trickle charges to be given when the car may be standing in its garage will be helpful and desirable, but I feel strongly too much reliance on this should not be made and that we | ||