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).
Battery test log showing results for the fourth and fifth charges, including cell density and voltage readings.
| Identifier | ExFiles\Box 168b\3\ img171 | |
| Date | 4th June 1928 | |
| -4- Contd. Date. (16) Fourth charge:- Charge given:- 100 ampere hours at 7 amperes Cell No. 1 2 3 4 5 6 Density 1275 1275 1275 1275 1275 1275 Voltage 2.65 2.65 2.65 2.65 2.65 2.65 +ve to cadmium 2.5 2.5 2.5 2.5 2.5 2.5 -ve to cadmium -.15 -.15 -.15 -.15 -.15 -.15 (17) Battery temperature:- 16°C Ampere-hours realised up to point where record takes a sudden turn down:- 70.6 Cell No. 1 2 3 4 5 6 Density 1165 1165 1160 1160 1165 1160 Voltage 1.75 1.80 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 .15 .2 .2 .2 .2 (18) Fifth charge :- Charge given:- 130 ampere hours at 7 amperes Cell No. 1 2 3 4 5 6 Density 1275 1275 1275 1275 1275 1275 Voltage 2.65 2.65 2.65 2.65 2.65 2.65 +ve to cadmium 2.5 2.5 2.5 2.5 2.5 2.5 -ve to cadmium -.15 -.15 -.15 -.15 -.15 -.15 Dates from right margin: 28-5-28 31-5-28 31-5-28 to 4-6-28 | ||