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).
Graph of output-speed curves for a Lucas E.575 Dynamo with 4, 5, 6, and 7 cells.
| Identifier | WestWitteringFiles\C\May1919\ Scan54 | |
| Date | 5th May 1919 | |
| LUCAS E.575 DYNAMO As plain shunt wound machine. Output-speed Curves to 4, 5, 6 and 7 fully charged large capacity cells in series. OUTPUT AMPERES DYNAMO SPEED (R.P.M) 4 cells 5 cells 6 cells 7 cells Data points on curves: 4 cells: 8.8, 9.0, 9.2, 9.4 5 cells: 11.0, 11.25, 11.50, 12.0 6 cells: 15.0, 15.5, 16.0, 16.4 7 cells: 17.0, 17.5, 18.0, 18.5 Small figures are operating voltages 8.55 10.75 13.6 15.9 VOLTS. 555 635 750 840 R.P.M C. E.7C 5/5/19 | ||