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Winter Project Hot Air Engine


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  #1  
Old 01-22-2019, 11:13:45 AM
Mike Unwin Mike Unwin is online now
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Default Winter Project Hot Air Engine

Good Day,
About 20 or more years back my brother Steve and I each built home made hot air engines I don,t know who we got the idea from but we each built one .
They are simple to build and cheap the only part I bought was a couple of small roller bearings, tools were basic too just a drill, hand coping saw, small torch to solder.
If anyone is interested in a winter project I can post dimensions and descriptions of parts.
For parts you will need a used shock absorber ,soup tins,pasta tin and brass rod I used old brazing rod .Since I built without plans it was trail and error that,s why the rods were soldered in the middle.So if anyone is interested post on and I will post the info .Not sure if Sterno is still made I think a small kerosene or even butane burner might be cheaper Cheers Mike
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Old 01-22-2019, 01:16:44 PM
casertractor casertractor is offline
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Default Re: Winter Project Hot Air Engine

Neat engine Mike


www.sternoproducts.com
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Old 01-22-2019, 08:18:39 PM
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Contaucreek Contaucreek is offline
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Default Re: Winter Project Hot Air Engine

Cool Mike! Sterno is still available. Look towards a party rental place, they use them for the chafing (sp) dishes, like at a buffet. Thumbs up!
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Old 01-23-2019, 11:08:52 AM
Mike Unwin Mike Unwin is online now
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Default Re: Winter Project Hot Air Engine

Thought I would go ahead and list the parts if not this winter but maybe sometime someone will want a engine project that can be carried with one hand made with hand tools and common parts.

So the wood parts

Deck 6 " x 15 " pine or plywood

Flywheel post 6.5 " x 1.5 " x 1.5 " pine or spruce whatever you have

Cylinder post 6.5 " x 2.25 " pine

Walking beam 14 " x 1 " this was over done on my part should have been tapered

Upright post 15 "

Legs on mine were 3" to suit Sterno can next I would use the bottom of a hurricane oil lamp better control of flame and cheaper to run !

---------- Post added at 10:08:52 AM ---------- Previous post was at 09:49:12 AM ----------

About the flywheel I used .5 plywood next one I build will try a sheave from a Duro water pump to make it look more engine like.

Flywheel 8" x .5 plywood with 2 " holes
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Old 01-23-2019, 11:47:41 AM
DustyBar DustyBar is offline
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Default Re: Winter Project Hot Air Engine

What are the sizes of the pistons and the stroke length for each? How did you make and fit the smaller piston? I assume the large can has water in it to make the seal for that piston.
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Old 01-23-2019, 01:45:14 PM
Mike Unwin Mike Unwin is online now
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Default Re: Winter Project Hot Air Engine

Folks I just found the plans I thought long lost and this was not my design it came from Darryl Boyd so credit where credit is due .
Sorry about that but at the bottom of the junk drawer there they were so here is the link...........http://boydhouse.com/stirling/

DustyBar maybe take a look there first if not maybe I can help you .Cheers Mike
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Old 01-23-2019, 02:41:00 PM
DustyBar DustyBar is offline
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Default Re: Winter Project Hot Air Engine

January, 1990, issue of Scientific American, had a simple stirling engine too. I hesitate to post it here since it is copyrighted material. I'll post two pages to give an idea of how it was built. I have not built it.

Thanks, Mike. Lots of good ideas at that web site. Good thing its still around.
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