Stirlingengineforum.com

This presents another interesting possibility for making porous ceramic high temperature displacers. https://youtu.be/jfgO4aBF2A8 I can hardly wait to finish setting up my shop and getting the kiln going. Still more structural work to be done on the building though. If you're going down that route ...

FRP = Fiber reinforced polymer. It's a generic term for any combination of fibers and plastic to produce a composite.

Here's an example, although I'm sure you can find it elsewhere much cheaper.

Interesting about the mica, I look forward to hearing how it worked out.

Interesting find, how strong is it? I was under the impression mica is brittle.

Circuitboard FRP is definitely heatproof enough for any temperatures you're likely to create with a regular wood fire. It's designed to be able to withstand repeated heating and cooling with a gas soldering torch.

Ok, I see what you're getting at. I'm thinking maybe two layers of thin circuitboard FRP (you can get it in different thicknesses) with something lighter sandwiched in between. Probably mix up glass spheres with high-temp epoxy for the filler in the middle. It's very light and very easy to machine. ...

Just so I can get a picture btw, what are you trying to achieve with this? In the engines I've seen up to now the displacer is never in direct contact with the flame. Does the final part need to be particularly strong? Or just light? If the latter there might be cheaper solutions than carbon fiber.

Carbon fiber cloth isn't very rigid, it's similar to fiberglass cloth if you've ever worked with that. Maybe similar to very heavy canvas if you haven't. Either way it doesn't have any rigidity until the epoxy cures. I've never tried stiffening fabric with waterglass before, but if it adheres well t...

I remember trying to work this one out to see if I could get the cylinders as physically far away from each other as possible (to improve insulation). The only idea I could come up with was to have two alpha engines offset at 90 degrees to each other in terms of phase. So you'd have the cold cylinde...

Energy independence. The globalists are pretty adamant that fossil fuels are to be phased out, they don't want nuclear energy and renewables aren't shaping up to the task of replacing existing infrastructure, so that's going to leave a lot of people lacking energy. Stirling engines are attractive in...

Also, you can get unimpregnated carbon cloth from here: https://www.grs.ie/product/carbon-fibre/

I'd imagine there's similar stockists in the US. I assume you have high temperature epoxy you want to stiffen it with?

Out of curiosity, have you tried the type of fiberglass circuitboards are made from? Those are definitely fireproof: They have to survive all kinds of high temperature processes. Or is that too heavy?