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 plotting armature current against coil voltage for a continuous ignition tractor.
| Identifier | ExFiles\Box 163\1\ img053 | |
| Date | 15th May 1939 guessed | |
| CONTINUOUS IGNITION TRACTOR PETROL W.D. Drg. UN.329 -- Curve sheet 6. Y-AXIS: Armature Current in Amps X-AXIS: Coil Voltage CURVES: 120A, 800A | ||