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 comparing the ampere output of two different 48 coil machines at various dynamo RPMs.
| Identifier | WestWitteringFiles\W\May1931-August1931\ Scan011 | |
| Date | 1st December 1930 | |
| 10 40/50 AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE 14.0 OUTPUT SPEED CURVES 1. 48 COIL MACHINE AS FITTED TO L.H. CHASSIS (65C° SETTING) 2. IMPROVED 48 COIL MACHINE (58C° SETTING) DYNAMO R.P.M. PII CHASSIS M.P.H. WITH 4 1/4 AXLE & 33.0" TYRE DIA: 1.12.30. | ||