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 a standard and an improved 48 coil machine for a 40/50 model.
| Identifier | ExFiles\Box 62\3\ scan0234 | |
| Date | 1st December 1930 | |
| 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 11/41 AXLE & 33.0" TYRE DIA: | ||