Stirlingengineforum.com

There have been ideas posted here in the past about Stirling's using reed type valves but I have yet to see anything that functions. It would seem that a flexible rubber reed valve would do little in the way of air flow restriction and should improve efficiency in the right design, there must be som...

I think the place that sells the goose that lays golden eggs has them. :) Seriously, I don't think such a Stirling exists. Your only option is to build one your self or possibly convert a internal combustion engine (results for doing that are not very good at getting much power) If you actually loca...

Welcome to the forum. I have been interested in rotary Stirling's too but I have not seen any that actually run. I'm sure there are running models but no one has posted any video that I have seen. It would seem that most geothermal systems use steam turbine's to spin generators. I would imagine that...

Just thought I would share some recent (recent to me anyway) discoveries. I decided to make a new power piston connecting rod for my LTD engine to eleminate a small knock that was bugging me and also decided to shorten the stroke as well. What I discoved was the shorter stoke lowered the compression...

I have lookded at your design diagrams and don't see how it could work. As I see it, you are making (designing) an "Alpha" type Stirling without a crankshaft and the tubing ports are trying to act as "phase". I have not seen or heard of a "free piston" alpha, so you mig...

A table saw can do a pretty good job as will a chop saw. Follow up with a sandpaper block or even a belt sander. I've had to make do with what I have as well. A drill press is the only truely useful Stirling "tool" I own. One day I hope to get a small 3 in 1 or hobby lathe.

I've used http://www.airpot.com for piston&cylinder sets they offer. About 20.00 US Dollars but worth it. As for tubular Plexiglas, the best prices on that stuff seems to be Ebay. Suppliers always have min orders that go way above what I can justify. I have a couple engine designs in my head and...

Compression = heat Expansion = removal of heat. (you can't make "cold", you can only remove heat) That is if I am schooled right. I have not tried this with a model Stirling but in theory, you should have a Stirling cooler if you power it externally with a motor. I would imagine that the g...

Nice running fans. Your copy looks as good as the original in the posted video. Good thing I don't have better metal working tools, lathe etc. or I'd never leave the garage.

I think you are correct about ratio's and from what I have seen, the bigger the displacer, the lower the temp differential is. This being a Gama type discussion...I think the size, however, reaches a point that it will take too much power to move either it's mass (weight) or push the weight of the a...

I think you are on to something, sounds like too much volume to me as well. Heat will also travel to the cold side easily without some kind of insulating barrier. In my opinion, a rotary will need to be thin and need to be split in half and have an insulator on the bottom plate. That is assuming you...

Thanks RichD, I like my engines to be different. I've seen some amazing brass works on the web that show very high maching skills and creativity. I'm happy with mine considering I only have a drill press and basic hand-metal working tools. I hope to add a lathe to my tools eventually. A small 3 in 1...

Welcome RichD, Ya, I know what you mean about the sleep thing, kind of pisses me off at times. I have actually (just once so far) got out of bed at some early hour to wright something down. I currently have a stack of sketches from when my mind wanders at work. I'll compile them into working plans s...

Can you remove the seal rather than make holes in it? I'm hoping there is no contact with the displacer or the friction will prevent your engine from running. I still think the spring isn't needed if the engine is properly balanced and it will likely add unwanted friction to your engine. The displac...

Half way between TDC and BDC is correct. Which side of half way will determine the direction of rotation. Usually, the displacer will lead the power piston by 90* in the direction you want the flywheel to spin. This can be a little confusing since direction can also be effected by which side of your...