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).
Improving engine starting by using a small additional carburetter instead of a choke.
| Identifier | ExFiles\Box 38\2\ Scan152 | |
| Date | 8th June 1921 | |
| Contd. -3- R10/G8.6.21. This seems comparatively easy and practicable but we do not know just yet whether this is sufficient or all we can do. Regarding the starting, this seems to be entirely a question of getting evenly distributed throughout the cylinders continuously a sufficiently rich mixture of fuel and air. It does not require the engine turning at a high speed, and we believe the trouble can be completely met by the use of the extremely small additional carburetter, and the small bore pipe or pipes leading to the induction manifold. I do not believe in a choker, as it is apt to get the engine (in careless and clumsy hands) flooded with liquid gasoline, amongst other things sooting up the plugs, and thus causing irregular firing, and also I do not think it advisable to attempt to run the engine at a higher speed by the starter motor because although the starter motor is sufficiently powerful and could be wound for a higher speed, or even by gear ed{J. L. Edwards} for a higher speed, it would make such a large drain upon the batteries that the trouble with the batteries would increase. Moreover, I do not think it is at all necessary, and considering that we have a battery ignition, and intend to fit a means of continuously getting gasoline into the induction manifold, with the extremely small carburettor mentioned above, the trouble of the difficulty of the engine should cease. Such an arrangement can be applied to existing cars and Mr. Platford has a model which can be used to Contd. | ||