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).
Wiring diagram for the testing arrangement of a Lucas R.R.I type regulator.
| Identifier | ExFiles\Box 166\2\ img245 | |
| Date | 11th January 1939 | |
| ELC7S. ARRANGEMENT FOR TESTING LUCAS R.R.I TYPE REGULATOR, 11 . 1 . 39, F, A, A1, E, D, C, +, V, A | ||