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).
Hand-drawn graph showing the Volt-Ampere characteristics of a controlled machine.
| Identifier | ExFiles\Box 61\2\ scan0221 | |
| Date | 16th June 1926 guessed | |
| VOLTS AMPERES U 2 3 4 5 6 7 External circuit characteristic. DIAGRAM 2. VOLT AMPERE CHARACTERISTICS CONTROLLED MACHINE. | ||