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).
Instruction sheet detailing the test results for a failed 5Z battery and its subsequent repair.
| Identifier | ExFiles\Box 54\1\ Scan260 | |
| Date | 3rd March 1928 | |
| RR 236 (150 BKS.) (DB {Donald Bastow - Suspensions} 431-8 12 24) MP 306975 X46175 ROLLS-ROYCE, LTD. INSTRUCTIONS. To E7L Order No. S.P.A.2. Customer's No. 3-3-28 Test on 5Z Battery (171) The two Oldham cells in this battery have failed. The reason of failure was over crowding of plates giving very little acid room, and also badly fitted separators which were too small allowing the plates to short over the edge of the separator. The plates were in good condition mechanically and very little sediment had collected at the bottom. These cells were replaced by two spare Oldham cells. The battery was bench tested on low rate discharge through a constant external resistance of 1.80 w and gave 27.6 ampere hours, all cells shewed positive weakness. After being fully charged the battery was given a high rate discharge through a fixed resistance of .100 w contd Signed This Sheet must be filed on completion of the work. | ||