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).
Suggestions for adjusting a regulator's winding turns and output amperage.
| Identifier | ExFiles\Box 166\2\ img125 | |
| Date | 25th October 1937 guessed | |
| -4- RM{William Robotham - Chief Engineer}/RC.{R. Childs}9/MH.{M. Huckerby} winding, so that instead of having 3 turns in the first portion leading to "A" terminal, and 3 turns in the second portion leading to "A"1, we have 4 turns in the first portion and 2 turns in the second. The total winding should still consist of 6 turns. (3) Both regulators to be adjusted to an output of about 15 amperes through terminal A1 at 13 volts, cold. To avoid complication and unnecessary expense, we can for the time being ignore the cutout. These suggestions are based on the fact that the LRT.7 regulator has a shunt winding resistance of 112 ohms, which may with less internal heating and thermostat removed, have a characteristic nearer to what we want. The object of the larger ratio of battery boost turns of the series winding, to load turns, is to reduce the battery current at 15 volts. If you are in agreement, we can return the two necessary units, or all five if you wish. In the meanwhile we await your comments. Yours faithfully, for ROLLS-ROYCE LTD. | ||