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 switchbox on the 14-EX model, noting its magneto function and additional earthing switch.
| Identifier | WestWitteringFiles\R\2December1927-February1928\ Scan050 | |
| Date | 13th December 1927 | |
| To R.{Sir Henry Royce} from EFC. c. RJ. E.{Mr Elliott - Chief Engineer} SWITCHBOX ON 14-EX. The switchbox on 14-EX has magneto in addition to battery on the first position, but there is the additional switch for earthing the magneto when not required. This way, the arrangement is not the one, (viz. the present standard arrangement of B; M, B & C; and M & C ) recommended for use with the auto switch, the test of which will be unaffected by this fact. EFC. | ||