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 discussing the analysis of fuel collected from induction pipes to test a vaporizer scheme and improve fuel distribution.
| Identifier | ExFiles\Box 50\3\ Scan168 | |
| Date | 27th August 1921 | |
| X4305 Oy1 - G 27.8.21 August 27, 1921 CC Mr. Belnap Mr. Nadin Mr. Caswell Mr. Claude Johnson, Managing Director, Rolls-Royce Ltd., London, England. Attention Mr. Hives. Dear Sir:- Re: Induction Pipes In my letter to you Oy2/08.8.21, I refer to the use of bottles on the induction pipe and in letter Oy1/C18.8.21 to our scheme of vaporizer. In your personal letter Hal/L29.8.21 you mention that you find bottles an excellent means of proving the distribution. We would go further and say that it has proved the most excellent way we have yet discovered of improving the distribution. Have you found this also? We have analysed the gas collected in one of these bottles after a period of warming up from 70°F.{Mr Friese} to about 170°F.{Mr Friese} in about 10 minutes, engine running idle. I enclose a print of the curve of distillation for this sample as compared with standard Socony, which was the fuel used on the test. From this it will be seen that the collection in the bottle is "heavy ends". The collection on first starting a cold engine is clear gasoline, with a higher percentage of the lighter fuel, but as the engine gets warm the collection consists of the heavier yellow constituents, probably with the addition of soot and lubricating oil, from the "blow-back" past the inlet valves. We have not been able to load-up a standard induction pipe with unheated 1" through pipe when bottles were on, so long as they were not filled with collected fuel. Without the bottles the same pipe would load up easily. | ||