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 various dynamos at 80°C.
| Identifier | ExFiles\Box 60\4\ Scan021 | |
| Date | 4th February 1931 | |
| 40/50 AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 OUTPUT SPEED PERFORMANCE CURVES OF VARIOUS DYNAMOS AT 80°C FULL CURVE LUCAS E.60 DYNAMO Nº E.1640 I. R.R. 56 COIL PHANTOM II DYNAMO 9° 122° (62C° SETTING) II. R.R. 48 COIL MEDIUM OUTPUT DYNAMO 16° 132° (58C° SETTING) III. R.R. 48 COIL HIGH OUTPUT DYNAMO 19.5° 129° (62C° SETTING) DYNAMO R.P.M. PH.II CHASSIS M.P.H. WITH 11/41 AXLE & 33.0" TYRE DIA. F.J.A 19.1.31 E.F.C 4.2.31 | ||