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).
Performance graph of ampere output versus dynamo speed for a coil machine.
| Identifier | ExFiles\Box 62\3\ scan0281 | |
| Date | 10th March 1932 | |
| AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 20/25 STD 48 COIL MACHINE WITH 60°C SETTING FOR USE WITHOUT T-R CHARGE SCHEME (4-4.18.TP.-.015"-.055") DYNAMO R.P.M. CHASSIS M.P.H. 11/50 AXLE 31.4" DIA: TYRES C.A.P. 10-3-32 | ||