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 output speed performance curves for a 48 coil 40/50 dynamo under three different operating conditions.
| Identifier | ExFiles\Box 57\1\ Scan047 | |
| Date | 26th November 1930 | |
| 40/50. AMPERE OUTPUT OPERATING VOLTAGES OUTPUT SPEED PERFORMANCE CURVES OF 48 COIL 40/50 DYNAMO AT 80°C. (19.5° 129°) I. AT SCHEDULE TERMINAL VOLTAGES. II. AT A CONSTANT TERMINAL VOLTAGE OF 14.0. III. AS I, BUT WITH FIELD RESISTANCE OF 33" OF 26 S.W.G. EUREKA WIRE (2.54 w.) DYNAMO R.P.M. S.S. CHASSIS. M.P.H. WITH 11/41 AXLE & 33.0" TYRE DIA. C.A.P. 25.11.30 E.F.C. 26.11.30 | ||