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).
Test log of battery performance, detailing charge cycles, cell densities, and temperature readings.
| Identifier | ExFiles\Box 168b\3\ img126 | |
| Date | 7th January 1927 | |
| -3- Date. (13) Third charge equivalent to average current of 6.0 amperes for 16.5 hours. 7-1-27. to 10-1-27 i.e. ampere-hours = 99.0 (14) Cell densities. (1) 1270 (4) 1270 (2) 1270 (5) 1270 (3) 1270 (6) 1270 10-1-27 (15) Initial amperes = 110.0 Temp. = 18°C. - Pouring on admixture. Time to 104 amperes: 4.3 mins. " " 100 " : 7.6 " " " 90 " : 13.6 " " " 80 " : 14.9 " 11-1-27 (16) Fourth charge equivalent to average current of 6.0 amperes for 13.0 hours. i.e. ampere-hours = 78.0 11-1-27. to 13-1-27 (17) Ampere-hours realised up to a point where record takes a sudden turn down :- Temperature :- 18.5°C. 14-1-27 (18) Fifth charge equivalent to average current of 6.0 amperes for 16.0 hours i.e. ampere-hours :- 96.0 14-1-27. to 17-1-27. | ||