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 comparing the output curves of Lucas E.575 and C.575 dynamos under cold and hot conditions.
| Identifier | WestWitteringFiles\D\May1920\ Scan81 | |
| Date | 14th January 1929 | |
| COMPARATIVE OUTPUT CURVES OF. Lucas E.575. and C.575. dynamos cold and hot Weight of either machine nearly 30 lbs Figures on curves represent operating voltages E.575. COLD E.575. HOT C.575. COLD C.575. HOT Vertical Axis: OUTPUT AMPS Horizontal Axis: DYNAMO SPEED (R.P.M.) Data points on curves (operating voltages): E.575 Cold: 14.0, 15.2, 14.8, 15.1, 14.0 E.575 Hot: 15.1, 14.4, 14.3, 15.0 C.575 Cold: 13.5, 14.0, 14.6, 14.5, 14.5 C.575 Hot: 13.0, 14.5, 14.5, 14.5, 14.6 Data in bottom left corner: 420 500 610 710 R.P.M 12.4 13.4 12.3 13.5 Volts | ||