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 comparing different dynamo windings based on ampere output versus RPM under hot conditions.
| Identifier | ExFiles\Box 36\4\ scan 252 | |
| Date | 21th March 1923 guessed | |
| Y 3014 OLD EXPL. LUCAS CF3 DYNAMO No BE 1341 HOT CONDITION OUTPUT AMPERE OUTPUT R.P.M Lucas Winding Our Winding Std Winding A.T.T.D.C. S.T.D.C. | ||