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).
Log sheet recording results from a series of battery charging and performance tests.
| Identifier | ExFiles\Box 54\1\ Scan014 | |
| Date | 2nd April 1925 guessed | |
| -3- (13) Third charge equivalent to average current of 6.0 amperes for 20 hours. i.e. ampere-hours = 120.0 (14) Cell densities. (1) 1290 (4) 1290 (2) 1290 (5) 1290 (3) 1290 (6) 1290 (15) Initial amperes = 110.3 Temp:- 18.5°C. Time to 104 amperes:- 9.7 mins. " " 100 " :- 12.8 " " " 80 " :- 15.4 " " " 80 " :- 17.7 " (16) Fourth charge equivalent to average current of 6.0 amperes for 20 hours i.e. ampere-hours = 120.0 (17) Ampere hours realised up to a point where record takes a sudden turn down:- 53.0 Temperature:- 18.5 C. (18) Fifth charge equivalent to average current of 6.0 amperes for 20.0 hours i.e. ampere-hours :- 120.0 Date Column (Handwritten): 12-7-24 to 15-7-24 15-7-24. 15-7-24 15-7-24 to 17-7-24 17-7-24. 19-7-24 to 22-7-24. | ||