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).
Report page on the fifth charge equivalent, detailing current, hours, and ampere-hours, with a note on measurement difficulties.
| Identifier | ExFiles\Box 48\3\ Scan324 | |
| Date | 18th January 1924 guessed | |
| (4) Contd. (18) Fifth charge equivalent to average current of 5.0 amperes for 11 3/6 hours i.e. ampere-hours = 58.0 Date. 30-11-23 to 3-12-23 It will be noted that the temp. & densities have not be taken, owing to the connecting bars passing beneath the filler holes & therefore will not allow the acid to be drawn into the hydrometer. | ||