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This is what I've had in mind

I'm planning on my engine to have 2 sets of cylinders(2x Power, 2x displacer), i have a question about the crankshaft.

Should I offset 1 of the cylinders by 180 degrees?

Is that okay?

Would a Gamma Stirling engine have to resemble this?

If I switch do diaphragm, would I have to shorten the cylinders? What should it look like? Does the Diaphragm just substitute the piston?

Also, I'm not looking to make a fast or efficient engine, I am making it for a project where I am going to show people that the Stirling engine actually exists and works.

He seems to do it alright:
https://www.youtube.com/watch?v=lvvyjJ8wz3Y<
https://www.youtube.com/watch?v=Cf81MzO6Zj0

Well, the problem is that those flasks are the only things that I own that "can" be used as cylinders, I also have very limited time to finish the project and have no machine to work on any metal at home.

Hey again,

I need to find something that I could use as a piston, the diameter of the cylinder is about 7.4cm. (not sure about the diameter as I am not home right now and I can't recall the last time I measured it).

Before I do anything. I would like to know if there were any advantages or disadvantages of using a V Layout or an Inline layout. I've considered both but the fact that the Hot cylinder would be further away from the cold cylinder in the V layout made me choose it. is there were any discernable diff...

Like this?

Then I should make it like this?

Here's a what I plan on it to look like and what parts I currently have (Now without the cans as they won't be useful as pistons unless I find a way to make them fit)

Hi everyone! i am making an alpha Stirling engine for a school project. I am using stainless steel flasks as cylinders and they have an inside diameter of 8cm but my pistons are about 6.2cm in diameter. I have thought about using some steel wool to fill in the space between the piston and the cylind...