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).
Test report on output current measurements under various conditions, including cold, hot, and battery load scenarios.
| Identifier | ExFiles\Box 166\2\ img136 | |
| Date | 26th November 1937 | |
| -3- 26th. November 1937. Output.Current at 15 volts, taken from terminal A with constant resistance load of 1.5 amperes taken from A1. Cold. First test - 5.4 amperes. Re-test - 4.5 " Hot. First test - 14.8 amperes. Re-test - 13.1 " The regulator was tested in a vertical position, the volts being measured at the regulator terminals. It will be seen that the results are substantially the same, and that while the output hot (17 - 17.5 amps.) is within our limits it appears to be so at the expense of a low cold output. (2) In connection with our proposal to alter the tapping of the series turns in order to obtain a suitable low charging rate through A at 15 volts, it was suggested that we take into account the fact that, for a given load at 13 volts through A1, the act of switching on a battery to A would increase the total current taken from the dynamo. Using a battery nearly fully charged and with the load resistance on A1 adjusted to give 13.0 volts, the corresponding current was 14.2 amperes. Then switching on the battery to A gave:- Regulator volts 12.8. Load current 13.9 amperes. Battery " 1.5 " This test repeated with a battery in about a 50% charged condition gave:- With load resistance only; Volts 13.0 Current 14.2 amperes. Switching on battery; Volts 12.6 amperes. VOLTS Load current 13.6 amperes. Battery " 4.0 amperes. | ||