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 performance curves and discharge capacity tests for various battery types including Fuller, Oldham, Exide, and P & R.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan215 | |
| Date | 30th November 1925 | |
| EFC1/T30.11.25. -4- Contd. Further, on sheet X we show a comparison of curves of the two standards and the experimental Fuller and Oldham made to the standard specification, and it will be noted that the Oldham shows up badly. This also shows up badly on low rate and is expected to improve in both respects, because the previous experimental Oldham was very much better. Also the Fuller does not shoe up as well as the Exide and P & R though its curve is comparable with those taken on the sandwich batteries S1 and S4 shown on the other sheet V, which were both composed of quite new P & R and Exide cells. All three may improve with use. It will be seen that the results of the high and low rate discharge capacity tests are, except in the case of the Exide, somewhat variable depending largely on the age of the cells. It is known from experience that the high and low rate outputs of a battery may increase considerably with use, so that where high rate curves and low rate results are given for batteries in their early life they may not be nearly representative of what they may be capable of later on. Taking advantage of the interchangeability of Exide, P & R, Fuller and Oldham cells made to our standard specification, we have arranged a programme of sandwich batteries as follows :- Contd. | ||