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 diagram of a Double Throttle Carburettor.
| Identifier | ExFiles\Box 66a\2\ scan0148 | |
| Date | 1st February 1927 guessed | |
| FIG. 2. (DOUBLE THROTTLE CARB). | ||