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 performance of various dynamos at a constant operating voltage.
| Identifier | ExFiles\Box 182\M19\ img280 | |
| Date | 4th February 1931 guessed | |
| AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 OUTPUT SPEED PERFORMANCE OF VARIOUS DYNAMOS FULL CURVE LUCAS E.G. I. R.R. 56 COIL PHANTOM II DYNAMO 90W II. R.R. 48 COIL MEDIUM OUTPUT DYNAMO III. R.R. 48 COIL HIGH OUTPUT DYNAMO DYNAMO R.P.M PH.II CHASSIS M.P.H. WITH 11/41 AXLE & 33.0" TYRES | ||