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).
Conclusion on a scheme for heating the centre of the induction pipe to aid fuel vaporisation.
| Identifier | ExFiles\Box 20\6\ Scan043 | |
| Date | 22th February 1921 | |
| Contd. -2- R5/G22.2.21. ------------------ petrol was very largely on the inside of the pipe, that after the pipe branched into two the distribution could not be easily corrected if there was any inequality between the front and the back three cylinders, and therefore, unless the central part of the trunk pipe were very hot the heat would be very little use beyond this point. In conclusion, it is highly desirable that we do not make the engine look ragged by extra exhaust pipes, and it would be very inconvenient to change the system of the exhaust. It was for this reason that I schemed what we might call a cross current scheme of heating the centre of the induction pipe. I feel that there is little doubt that this will be found effective and convenient to fit, and need not make any unsightly alteration in the appearance of the engine. We conclude that the heated part must be very hot, and be in a position that all liquid fuel will fall upon it, and be changed to fog(smoke) and so rendered very finely divided, as in the case of steam (invisible) condensing into aqueous vapour (visible) We are aware that our induction pipe is not as well disposed as it might be. We prefer now that it shall drain away from the cylinder openings, but it may be that it will be faultless when we interpose the hot central junction box so that no liquid can pass this spot without being turned to vapour. R.{Sir Henry Royce} | ||