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).
Letter from The Zenith Carburetter Co. regarding choke sizes and the suitability of a 36 twin carburetter.
| Identifier | ExFiles\Box 122\1\ scan0118 | |
| Date | 1st June 1931 | |
| THE ZENITH CARBURETTER CO., LIMITED. Sheet No. 2. Messrs. Rolls-Royce, Ltd. 1st June 1931. into account the fact that the suction from three cylinders is not as steady as in the case of a 4 cylinder engine, you should fit a choke slightly larger than the one given by the chart, i.e. 20 or 21. You will see then that the 36 twin carburetter, although slightly large, should be suitable for your engine. We hope you will find the above information satisfactory, and always at your entire disposal, We remain, dear Sirs, Yours faithfully, THE ZENITH CARBURETTER CO. LTD. L. Prat CHIEF ENGINEER. LP{Mr Lappin}/IH | ||