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Briggs on Compressed air or steam.

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Ed in Zhills

03-04-2002 09:02:28




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At the Zolfo Springs show I saw a 3hp Briggs & Stratton running on Compressed air. Air was let in where the carb. had been. Anyone know how this engine was modified? The cam would have to be changed wouldn't it. The muffler was on it and the sparkplug was used to plug the hole. No ignition.No air shroud. I was unable to talk to the owner. I would like to build one.




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Dana

01-13-2003 08:04:51




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 Re: Briggs on Compressed air or steam. in reply to Ed in Zhills, 03-04-2002 09:02:28  
I modified a B&S engine like this when I was in high school (1976). I built up gobs of brazing material on the cams and then spent a couple of days grinding / filing them to a new shape (2 lobes on each cam). The idea was to make a steam engine. It ran OK on compressed air, and did about 3500 rpm on 100psi steam. We only ran it on steam a couple of times.... the boiler was horribly inefficient, and looking back probably horribly dangerous as well. I left it in the high school shop when I graduated.

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Mike S

03-10-2002 05:08:24




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 Re: Briggs on Compressed air or steam. in reply to Ed in Zhills, 03-04-2002 09:02:28  
Seems to me that you would not have to change anything other than making the adapter to put where the carb would be. I think one you got it to spin with the air applied to it, it would continue to run. Kinda like a pump I suppose. Since there is not ignition, I don't think it would get too hot. And the air pressure coming in would have to be greater than the compression stroke would produce. I wonder why the guy did it?

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