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 curves of a dynamo under three different test conditions for a PII chassis.
| Identifier | WestWitteringFiles\W\May1931-August1931\ Scan058 | |
| Date | 10th June 1931 | |
| 40/50 1 AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 OUTPUT SPEED CURVES OF DYNAMO. 1. WITHOUT SERIES FIELD WINDING. 2. WITH SERIES WINDING, BUT WITHOUT ALTERING POSITION OF CONTROL BRUSH. 3. AS IN 2. BUT WITH PEAK CORRECTED BY RESISTANCE. PII CHASSIS M.P.H. WITH 11/41 AXLE & 33.0" TYRE DIA: DYNAMO R.P.M. C.A.P 10-6-31 | ||