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 under various demand conditions.
| Identifier | ExFiles\Box 165\6\ img249 | |
| Date | 27th December 1929 | |
| To Sg.{Arthur F. Sidgreaves - MD} from EFC. To E.{Mr Elliott - Chief Engineer} To PN.{Mr Northey} c. Wor.{Arthur Wormald - General Works Manager} Ry. c. Da.{Bernard Day - Chassis Design} EP.{G. Eric Platford - Chief Quality Engineer} X6003 EFC3/AD27.12.29. X.294 X.8780 X.5664 X6003 X.5665 X6004 PERFORMANCE OF DYNAMO BATTERY SYSTEM IN RELATION TO DEMAND. References Sg{Arthur F. Sidgreaves - MD}13/E19.12.29, E1/M21.12.29 and PN{Mr Northey}3/WT23.12.29. In the absence of any form of automatic control you are right in concluding that we consider dynamos of the intermediate output type, which we are pushing on with as quickly as possible, to be the most useful line of development for the immediate future. Although in the present circumstances we think the recommendation for garage charging, as given in the Instruction Book, to be highly desirable, we have all along been of the opinion and have expressed our-selves to R.{Sir Henry Royce} to that effect (in our EFC1/T30.3.28) that it would be a great gain to be able to provide a system that would relieve the customer of anxiety under any one or more of the three heads, 1, 2 and 3 given at the beginning of the report quoted (i.e. without the necessity of garage charging whatever). These heads we here reproduce for convenience of reference :- (1) Low speed (frequent starting and standing) under-charge, and consequent over-discharge of the battery. (2) Medium speed overcharging when there is little or no demand on the system. (3) High speed under output and therefore over-discharge of the battery during powerful lighting at night. | ||