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 dynamo output speed curves showing the effect of series winding excited by headlamp current.
| Identifier | ExFiles\Box 60\4\ Scan092 | |
| Date | 1st September 1931 | |
| 40/50 AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 OUTPUT SPEED CURVES SHOWING EFFECT OF SERIES WINDING EXCITED BY HEAD LAMP CURRENT. 1. WITHOUT SERIES WINDING. 2. WITH SERIES WINDING SUPPLIED THROUGH 36 WATT LAMPS. 3. WITH SERIES WINDING SUPPLIED THROUGH 60 WATT LAMPS. DOTTED CURVE SHOWS OUTPUT OF STD MACHINE UNDER CONDITIONS SIMILAR TO THOSE OF CURVE 3. DYNAMO R.P.M P II CHASSIS M.P.H. WITH 11/41 AXLE & 33.0" TYRE DIA. C.A.P. 1-9-31 | ||