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).
Extract detailing an adjustment to a Dynamo's control brush and its effect on battery charge.
| Identifier | ExFiles\Box 60\1\ Scan063 | |
| Date | 28th December 1928 | |
| X7660 Extract from FJA1/C28.12.28 X.7780 18 EX DYNAMO X.7860 The control brush had been moved before my arrival here and the peak output raised to approximately 11.0 amperes. The spare machine has not therefore been fitted and the battery charge under the conditions of running appears to be maintained. The car is run after dark nightly for 6 or more hours with the Lucas 60 w. headlamps on, there being a discharge of 2 or 3 amperes from the battery at the speed maintained most of the time. This is a in addition to day running. | ||