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).
Comparison of low and high rate discharge capacity results for Exide, P & R, Fuller, and Oldham batteries.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan214 | |
| Date | 30th November 1925 | |
| EFCl/T30.11.25. -3- Contd. Exide 6RR5/1 and P & R RR.11 Batteries. These are our present standards, notes upon which were given in our EFCl/T17.10.24. Typical low and high rate discharge capacity results were given and reasons why the high rate discharge result of the P & R was not so good as that of the Exide. Typical low rate discharge capacity results of actual discharges through a constant external resistance of 1.80 ohms are as follows :- Exide 6BXRE5/SPL. 58 ampere-hours. Weight 88lbs. Fuller OSV12/85. 95 " " " 90 " Fuller RRll/1. 76 " " " 93 " Oldham 6NV5/1. 54.4 " " " 80 " Oldham (to specn) 42 " " " 108 " Exide 6RR5/1. 81.6 " " " 103 " P & R RR.11. 53 " " " 103 " Except in the cases of the first two batteries, all these refer to batteries containing cells made up to our specification, which cells therefore are completely interchangeable in the various batteries. Some of the high rate discharge capacity results are contained on sheet V herewith. These include the original experimental Fuller and Oldham batteries and the Fuller and Oldham made to our specification, also the curve of the Hart battery, not previously mentioned, which battery failed in one cell and was returned. We have now received another in its place. The Plante battery also is unsatisfactory. There are curves of two of our experimental batteries S1 and S4 also shown. Contd. | ||