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).
Blueprint drawing of the carburetter throttle for the 40/50 (Phantom) model.
| Identifier | ExFiles\Box 66a\1\ scan0222 | |
| Date | 1st July 1926 guessed | |
| X8080 .100 MAX: RAD RUNNING OUT AT POINTS "A" .010 RAD SCALE 10/1 40/50 (PHANTOM) CARBURETTER THROTTLE | ||