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 of a 20 HP dynamo with various resistances in the field circuit.
| Identifier | ExFiles\Box 168a\5\ img008 | |
| Date | 26th March 1926 | |
| 20 H.P. 20 H.P. IGNITION BALLAST 1.725 ω O.M.F HEAD LAMP 40/50 H.P. IGNITION BALLAST REMY IGNITION BALLAST OUTPUT OF 20 H.P. R.R DYNAMO AS STANDARD AND WITH VARIOUS RESISTANCES IN THE FIELD CIRCUIT AS LABELLED ALL CURVES FOR OPERATION WITH RESISTANCES TAKEN AT APPROXIMATELY 65°C. R.P.M. 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 H/a 26.3.26 E.T.C. | ||