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 detailing battery cell performance, charge data, and temperature readings.
| Identifier | ExFiles\Box 52\4\ Scan053 | |
| Date | 3rd June 1929 guessed | |
| -3- Contd. Date. (12) Cell No. 1 2 3 4 5 6 Density. 1100 1100 1100 1100 1100 1100 Voltage. 1.75 1.75 1.75 1.75 1.75 1.75 +ve to cadmium. 1.95 1.95 1.95 1.95 1.95 1.95 -ve to cadmium. .2 .2 .2 .2 .2 .2 (13) Third [strikethrough]Second[/strikethrough] charge:- Charge given:- 7 amperes for 20 hours = 140 ampere hours. (14) Cell No. 1 2 3 4 5 6 Density. 1280 1280 1280 1280 1280 1280 Voltage. 2.7 2.7 2.7 2.7 2.7 2.7 +ve to cadmium. 2.4 2.4 2.4 2.4 2.4 2.4 -ve to cadmium. .3 .3 .3 .3 .3 .3 (15) Battery temperature:- 72°F 22°C. Initial amperes :- 107 Time to 104 amperes :- 7.1 mins. " " 100 " :- 12.5 " " " 90 " :- 16.9 " " " 80 " :- 18.0 " Cadmium readings:- [strikethrough]Contd.[/strikethrough] +ve 2.0 -ve .5 Contd. Handwritten dates on the right: 21-6-29 21-6-29 6 25-6-29 26-6-29 26-6-29 | ||