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I've been watching a lot of YouTube and Patreon builders who are experimenting with the turbines. All very promising.
I do plan on building my own, because it's a very interesting path. And also, ebay isn't really an option in Vietnam hehe.

In the past I didn't always get what you (Tom) were talking about. But I think I've come to a similar conclusion as you during my recent research. I've been looking into Tesla turbines in great detail and have a configuration in mind that eventually might work as an ambient heat engine. This is goin...

I think so too. I'll first try to get my hands on a Tesla valve to run some tests. I can't readily find a metal one, so I might have to get one made.

Wow, was it really december since I last visited here? Time really flies. Had some other things to take care of, so I couldn't work on this. But the thinking never stopped. I recently got back into it because a friend gave me a nudge I wasn't expecting. In stead of Stirling engine I'm now looking at...

After getting myself in a mental loop of efficiency and solutions I had to take a little step back and try to see what was really important. I've got one rotor here that I'll turn into a single rotor prototype. So I'll heat up one side of the cylinder and cool the other. Just to see if this concept ...

Fair enough, no absolute zero. But in my thinking, because transferring every little bit of heat energy into work takes a long time if you're only bringing the fluid back to it's original size. That's why you would over expand it with a piston. But finding the efficient amount of over expansion will...

You were talking about absolute zero in your original post. I was assuming you were trying to get there.

But what you're proposing here would mean finding a sweet spot somewhere. A sweet spot of piston stroke. That won't be easy.

Thinking about it, I guess the fact that it seemed to work quite well in that video with very little lift of the displacer is promising that a smaller displacer compared to piston would work as well.

Depends what you mean by "starting" I guess. Well all engines start at a certain pressure. Be it atmospheric or pressurized. You'd have to expand the fluid beyond that too cool it further. That's what I was getting at. Also, I'm interested to see how all this works on something else than ...

So as I understand this idea you'd need to expand the air beyond its starting volume and below its starting pressure? Do you plan to do this with a calculated stroke? Another idea would be to use something in the same direction Vincent is building. But in stead of dwell you'd somehow disconnect the ...

It's quadruple the work and maybe a bit much for a test setup, but if you have four or more of these in a "circle" you can lead the expanded gas to the cylinder that's 90 degrees away. That way you don't have to have a moving rod through the piston, but you can connect the piston and displ...

I'm approaching it from the rotary vane angle. It allows me to create chambers where I hold the fluid and move it to where I need it. Right now I'm at the point where I use the fluid at its hottest to power my cold rotor. There will be excess fluid that, in stead of pushing it with the hot rotor thr...

That's an idea, yeah. Hadn't thought of that. Thanks.

I don't really see how regenerators in the general sense do anything else than basically change the timing of heating and cooling. So the most work would be done at a different crank angle. For my idea I'm trying to store some heat in the fluid so I can use it to extend the heating cycle. Haven't fu...

While we wait for that drawing. I'll write down some of my theoretical findings. haha I can't find a more efficient way in my imagination to build a Stirling engine than the vane model. Not only is it ideal because the work is done in the actual direction it is needed, but also because of the flexib...