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 performance curves for a 48 coil medium output machine, plotting ampere output against dynamo RPM.
| Identifier | ExFiles\Box 163\6\ img134 | |
| Date | 31th January 1931 guessed | |
| 40/50 2 Ampere Output At Constant Operating Voltage of 14.0 X.6004 Output Speed Performance Curves OF 48 Coil Medium Output Machine AT 80°C WITHOUT & WITH 6" FIELD RESISTANCE (16° 12's°) (65c° setting) III. 48 coil High Output dynamo 19.5° (12c° setting) Dynamo R.P.M. C.A.S / C.V | ||