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).
Continued discussion on Daimler lubrication, outlining a theory for the cause of smoking in sleeve valve engines.
| Identifier | ExFiles\Box 16\1\ Scan020 | |
| Date | 23th February 1911 guessed | |
| Daimler lubrication. (Contd) (2) efficiently as oil throwers at fairly low speeds. I do not think the system will cure the trouble of smoking, because I consider this a fundamental difficulty with all lubricated sleeve valve engines. I believe the smoke in these engines to be caused by particles of oil being scraped off by the edges of the exhaust port as they pass over the sleeve preparatory to opening, and these particles then being burnt by the hot exhaust gases as they pass through the exhaust system. This theory is an assumption, but is partly borne out by the fact that the cylinders keep clean, - this they would not do if there was a surplus of oil in the cylinders (sufficient to cause smoke), unless the compression were lower than is the case with these engines. [Stamp in center of page]: 1804 [Watermark]: DICKINSON BOND | ||