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 showing the output speed performance of a 48 coil 40/50 dynamo under three different conditions.
| Identifier | ExFiles\Box 163\6\ img090 | |
| Date | 26th November 1930 guessed | |
| AMPERE OUTPUT OPERATING VOLTAGES OUTPUT SPEED PERFORMANCE OF 48 COIL 40/50 DYNAMO (19.5° 129°) I. AT SCHEDULE TERMINAL VOLTAGE II. AT A CONSTANT TERMINAL VOLTAGE III. AS I BUT WITH FIELD RESISTANCE EUREKA WIRE (2.54 w.) DYNAMO R.P.M. S.S. CHASSIS. M.P.H WITH 11/41 AXLE & 33.0" TYRE DIA. | ||