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 tests, including density, voltage, and cadmium readings.
Identifier | ExFiles\Box 168b\3\ img027 | |
Date | 7th January 1930 guessed | |
-3- contd. Date. (12) Table of P+R (cells 1-3) and Exide (cells 4-6) battery readings: Cell No. | 1 | 2 | 3 | 4 | 5 | 6 Density | 1150 | 1150 | 1150 | 1100 | 1100 | 1100 Voltage | 1.9 | 1.9 | 1.9 | 1.75 | 1.75 | 1.75 +ve to cadmium | 2.0 | 2.0 | 2.0 | 1.85 | 1.85 | 1.85 -ve to cadmium | .1 | .1 | .1 | .1 | .1 | .1 (13) Third charge:- Charge given :- 110 ampere hours at 7 amperes. (14) Table of P&R (cells 1-3) and Exide (cells 4-6) battery readings: Cell No. | 1 | 2 | 3 | 4 | 5 | 6 Density | 1280 | 1280 | 1280 | 1280 | 1280 | 1280 Voltage | 2.65 | 2.65 | 2.65 | 2.65 | 2.65 | 2.65 +ve to cadmium | 2.45 | 2.45 | 2.45 | 2.45 | 2.45 | 2.45 -ve to cadmium | -.20 | -.20 | -.20 | -.20 | -.20 | -.20 (15) Battery temperature:- Before 66°F 18°C. After 80°F P&R 83°F Exide Initial amperes :- 106.0 Time to 104 amperes :- 3.6 mins. " " 100 " :- 8.5 " " " 90 " :- 15.9 " " " 80 " :- 19.6 " Cadmium readings Table of P&R and Exide battery readings: | P&R | Exide Density | 1220 | 1190 Voltage | 1.8 | 1.2 +ve to cadmium | 2.0 | 1.6 -ve to cadmium | .2 | .4 | ||