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).
The development and performance of the Exide 6BXRE5 battery for the 40/50 chassis.
| Identifier | WestWitteringFiles\M\2October1924-December1924\ Scan54 | |
| Date | 17th October 1924 | |
| To R & E.{Mr Elliott - Chief Engineer} from EFC. c. CJ. & PN.{Mr Northey} c. Wor.{Arthur Wormald - General Works Manager} Wd.{Mr Wood/Mr Whitehead} c. Ev.{Ivan Evernden - coachwork} EP.{G. Eric Platford - Chief Quality Engineer} c. Da.{Bernard Day - Chassis Design} X.664 - BATTERIES FOR 40/50 CHASSIS. Exide 6BXRE5 (Standard until recently). This refers to the final form (complete with all improvements) of the original 6BXRE5 battery. All the troubles which we have had in various stages of development of this battery have practically disappeared. Previous to the inclusion of the ebonite separators in addition to those of wood, the internal resistance of the battery was considered alright. The improvement of the inclusion of ebonite separators (from a reliability point of view) increased the internal resistance to a rather higher figure than we thought fit to specify. The various improvements effected between the original and the final forms were detailed in our EFC3/T7.3.21, extract from which report is attached. These batteries now appear to be giving reasonable service outside, lasting in some instances for 3½ years, though on Test Dept. work they have not seemed to be all that is desired, still suffering from premature disintegration of the plates. The weight of this battery is 83 lbs. and capacity 55 ampere-hours, a figure which has been considered rather on the small side for the 40/50 car. Typical high rate discharge curves are attached and typical low rate discharge results are tabulated at the end of this report. Contd. | ||