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 open circuit voltage curves for a Lucas E.575 dynamo with separate excitation.
| Identifier | WestWitteringFiles\C\May1919\ Scan52 | |
| Date | 5th May 1919 | |
| LUCAS E.575. DYNAMO OPEN CIRCUIT VOLTAGE CURVES SEPARATE EXCITATION A VOLTS 70 60 50 40 30 20 10 0 FIELD AMPERES 0 .5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 MAIN VOLTAGE 2500 R.P.M. VOLTAGE BETWEEN +VE AND CONTROL BRUSHES - 2500 R.P.M. MAIN VOLTAGE 1500 R.P.M. VOLTAGE BETWEEN +VE AND CONTROL BRUSHES - 1500 RPM E7C 5/5/19 | ||