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).
Table defining the new standard volt-ampere characteristic of battery and leads for dynamo tests.
| Identifier | ExFiles\Box 31\1\ Scan086 | |
| Date | 1st October 1920 | |
| X. 294. NEW STANDARD VOLT-AMPERE CHARACTERISTIC OF BATTERY AND LEADS FOR DYNAMO TESTS. Amperes. (A) Cold volts. (B) Hot volts. 0 12.4 (Balancing volts). 13.6 1 12.6 13.725 2 12.8 13.85 3 13.0 13.975 4 13.2 14.1 5 13.4 14.225 6 13.6 14.350 7 13.8 14.475 8 14.0 14.6 9 14.2 14.725 10 14.4 14.850 11 14.6 14.975 12 14.8 15.1 13 15.0 15.225 14 15.2 15.35 15 15.4 15.475 16 15.6 15.6 Limits ± Note:- The (A) characteristic assumes an external circuit resistance of .1 ohm together with an E.M.F. rise of .1 volt per ampere. The (B) characteristic assumes an external circuit resistance of .1 ohm together with an E.M.F. rise of .025 volt per ampere. EFC. | ||