Calculation of ampere-hours for a fifth charge.
| Identifier | ExFiles\Box 38\5\ Scan182 | |
| Date | 16th December 1921 | |
| Contd. (4) Date. (18) Fifth charge equivalent to average current of 6 amperes for 18 hours i.e. ampere-hours = 108 16.12.21 | ||
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).