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I've not posted in a long time, but the project is still on.

I'm finally getting to work on this project.

I'll post back the vid once it's finished and I plan to use frensel lenses to try and power it during the day time if I can

Anyhow FYI

Hi I was thinking perhaps, 2 separate chambers 1) hot, and 1) cold and only connected perhaps with a pipe, So the hot are should still expand, and the cold should still contract, and the pipe which connects the 2 separate displacement containers would have a heat/exchanger neutralizer which would I ...

Mountain Stirling wrote:I have a metal lathe and milling machine if anyone needs anything made. Send me the spec.s and I will get back with you.
Thanks :D

Nice gesture, I may need a piston for my 55 gallon drum design.

I'll know better once I get the 55 gallon drum displacer finished.
Thanks for the post

Cartech- Thanks for the reply. All ideas are good they help me collect my thought and even come up with other ideas. Thats good to know about the air flow thru the displacer not being to free, and having some restriction. This is great news. Yes to the 2/3rds. I'm not sure what you mean by LTD I'm g...

Agent86, I'm no expert either and have just two working models under my belt. From what I have read, the mesh is usually steel wool and some times Scotch Brite pads but these are being used in models not large engines (to my limited knowledge) Maybe a suitable regenerator/displacer for you engine c...

Not a bad idea at all but it will need to increase the power a fair amount to offset the extra energy required to run it. The weight and friction of plumbing fittings etc. I know your taking about a pretty large scale engine here and maybe it's less of a factor but it will add extra effort to your ...

As far as I understand it, a regenerator is a very good idea - the efficiency you will achieve without one will be abysmal. Not sure on the best type but you could either go for something like steel wool or mesh screens inside the displacer itself (ie so the air is forced through holes in the displ...

fokker - thanks I'll do that Basically I guess I'm trying to get a simple idea of what my working design should look like on paper. My displacer currently will be a 55 gallon drum, and piston size will be made from some pvc probably 4 inch piston for starters, and if that piston proves too large, th...

You may find the following formula useful: Vmax/Vmin = 1 + ((Tmax-Tmin)/1100) Where Vmax and Vmin indicate the maximum and minimum power piston volumes (ie. at top of stroke and at bottom of stroke). Thanks, Please clarify this a bit. What does Tmax-Tmin refer to ? temperature ? Perhaps I can toy w...

Thank you! You need large cooling/heating surfaces (heat flow) in order to quickly (power) cool/heat a big ammount (power) of air inside the engine's pressure vessel. Somewhere over the interwebs, i picked up, that the swept volume of the working piston (WP surface x WP travel) should equal one qua...

Hi all I'm not sure exactly which ratio the displacer to piston should be, or if the piston is better to have long stroke or shorter stroke. In anycase if I need to add dispacer volume, then I'll use 2 drums in parallel working together and perhaps union them together with a T both going into the he...

Hi all I'm curious about the walking beam design. I'm currently gathering my parts for a huge model built from a 55 gallon drum and perhaps 4 inch piston, then later perhaps out of a larger huger drum. This should be fun. My flywheel and linkage will be a standard bicycle, but must be hard linked no...

I like it too, Curious about the heat temperature, perhaps hot water heating the bottom portion ? Could that be sufficient to heat the bottom area to about 170-200 degrees, and the top upper portion I'm going to use my own design of cooling at around 45-50 degrees. I'm curious if it will run with th...

Hi, this is nice design. I'm gathering info to build my first mini Stirling engine. I'm planning on building a huge one at my house if I can get these small various ones working correctly Can you tell approx. how much power this 5 cylinder engine might have at low heat ? Please advise on any info Th...