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Sorry for jumping in late - I'm replying to Bill Kambic, too.
(No Offence, Bill, Finger Trouble on my part) Gord Beaman wrote: wrote: On Tue, 31 May 2005 04:35:22 GMT, Gord Beaman wrote: "R Leonard" wrote: And for what it's worth, there were even diesel model airplane engines, at least in the years immediately after WWII. I've a couple of flying model airplanes my father built in the 1946 to 1950 period so equipped. Rich Sure...aren't most model a/c engines Diesel?...I've had several way back when I was young...(in the fifties) they all had glo-plugs for starting and none had an ignition system...mine were all two stroke cycle Diesels... much simpler. I had 'em, too. They did function on the same principle as diesels, but were powered by a form of gasoline. They were not powered by diesel fuel. Model Airplane Glow Fuel is usually Methanol, with something (Usually Castor Oil) added to make it lubricate better. High performance fuels used to have Nitromethane added in as well. I don't know if they still do that. AFAIK, the model diesels did run on kerosene. I've never run one, but I've seen a couple. Neat little widgets. There isn't a whole lot of difference between them and a glow engine in construction, save for the head. Instead of a glow plug, they've got a screw that adjusts an opposing "piston", allowing you to change the combustion chamber volume and therefore the compression ratio. Yes, thanks Bill...I knew that they didn't use diesel fuel, smells much more potent to me...someone mentioned here that they use the heated filament as a hot-spot for ignition (for the running phase) rather than compression heat (as in a true diesel) which makes sense. That's the way I understand it. The glow plug's wire must not transfer heat to the head very well. -- Pete Stickney Java Man knew nothing about coffee. |
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