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).
The dynamo output for the 12-EX model and its compatibility with an auto switch.
| Identifier | ExFiles\Box 59\1\ Scan229 | |
| Date | 24th January 1928 guessed | |
| -2- for putting on 12-EX, as the dynamo referred to above. At the moment, although set a little higher than normal, it is not set to a high enough output such as we propose to use with the auto switch. EFC. | ||