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 various dynamos, plotting ampere output against RPM.
| Identifier | Morton\M19\ img280 | |
| Date | 4th February 1931 guessed | |
| AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 OUTPUT SPEED PERFORMANCE OF VARIOUS DYNAMOS FULL CURVE LUCAS E.6 I. R.R. 56 COIL PHANTOM II DYNAMO 9 AMP II. R.R. 48 COIL MEDIUM OUTPUT DYNAMO III. R.R. 48 COIL HIGH OUTPUT DYNAMO DYNAMO R.P.M PH. II CHASSIS M.P.H. WITH 11/41 AXLE & 33.0" TYRE Y-Axis Scale: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 X-Axis Scale (Upper - R.P.M): 0, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400, 2600 X-Axis Scale (Lower - M.P.H.): 0, 5, 10, 15, 20, 25, 30, 35, 40, 45 | ||