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).
Comparing the performance of an Exide 6RR5 battery and a P & R RR.11 battery on a 40/50 Chassis.
| Identifier | ExFiles\Box 54\2\ Scan082 | |
| Date | 24th March 1926 | |
| Expl. Report. X4617 Ref. EFCl/T24.3.26. To R. {Sir Henry Royce} from EFC. {E. Fowler Clarke - Electrical Engineer} c. Da. {Bernard Day - Chassis Design} E. {Mr Elliott - Chief Engineer} c. CJ. Ev. {Ivan Evernden - coachwork} c. Rg. {Mr Rowledge} EP. {G. Eric Platford - Chief Quality Engineer} 40/50 CHASSIS. X.4617. UP-TO-DATE STANDARD EXIDE 6RR5 AND P & R. {Sir Henry Royce} RR.11 BATTERIES. Please find attached copy of my assistant's report JC.15 dealing with a comparison of two batteries, one of each of the above types, which have been taken through an accelerated life, consisting mainly of intensive work on the bench and intensive running on chassis in France. It is considered in a general way, taking all things into account, that the performance of the two batteries is approximately equal, and it must be remembered that though the actual life of the batteries in months does not seem great, the nature of the work to which they have been subjected is such that on the whole either battery may be considered to have given a very fair performance. It will be seen that the initial bench performance of the P & R battery was not up to that of the Exide. It is known, however, that the performance of the P & R battery increases with use (though in this particular case there was no opportunity of taking such tests at intermediate times) and the fact of a battery giving lower capacity initially than its rated capacity and afterwards increasing to it, is considered to be a negligible disadvantage in actual use. Contd. | ||