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).
Chart showing the special volt-ampere characteristic of a battery and leads for dynamo tests with a vibrator regulator.
| Identifier | ExFiles\Box 31\1\ Scan087 | |
| Date | 1st October 1920 | |
| X.294. SPECIAL VOLT-AMPERE CHARACTERISTIC OF BATTERY AND LEADS FOR DYNAMO TESTS WITH VIBRATOR REGULATOR. Amperes. (c) Cold volts. (d) Hot volts. 0 12.4 (balancing volts) 13.6 1 12.7 13.8 2 13.0 14.0 3 13.3 14.2 4 13.6 14.4 5 13.9 14.6 6 14.2 14.8 7 14.5 15.0 8 14.8 15.2 9 15.1 15.4 10 15.4 15.6 11 15.7 15.8 12 16.0 16.0 Limit ± .1 Note:- The (c) characteristic assumes an external circuit resistance of .2 ohm together with an E.M.F. rise of .1 volt per ampere. The (d) characteristic assumes an external circuit resistance of .2 ohm together with no rise of E.M.F. EFC. | ||