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 Smith (T&M) Type A Dynamo with 4, 5, 6 and 7 cells.
| Identifier | WestWitteringFiles\C\August1919\ Scan48 | |
| Date | 26th May 1919 | |
| AMPERES OUTPUT DYNAMO SPEED (R.P.M.) C. SMITH (T&M) TYPE A DYNAMO As plain shunt wound machine Output - Speed Curves to 4, 5, 6 and 7 fully charged large capacity cells in series. Small figures are operating voltages. 4 cells 9.4 9.2 9.0 8.8 5 cells 11.6 16.0 15.5 15.0 11.0 6 cells 12.4 16.3 7 cells 18.5 18.0 17.5 17.0 8.60 10.80 13.50 15.80 VOLTS 380 440 520 590 RPM E7C 26/5/19 | ||