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 illustrating a double throttle carburettor.
| Identifier | ExFiles\Box 66a\1\ scan0170 | |
| Date | 20th February 1927 guessed | |
| Fig. 3. (DOUBLE THROTTLE CARB.) | ||