Stirlingengineforum.com

A type of linkage that may not be mechanically deadlocked :

I think you can just take your idea of a seismograph-like pen attached to the piston and write the trace on a ribbon for a temperature t. Roll the ribbon at a fixed speed s, take any amount of cycles to find the diameter of a circle. An ideal frictionless zero-weight lobed cam wheel will do one revo...

Another option would be some sort of magnetic levitation track, but I feel this would steer away from the cheap and low-tech intent I had.

I had a thought also, if the engine likes heat nearer to the center of the cylinder (depending on the design) a narrowing of the updraft chimney pipe at the point where the engines are attached might create a kind of vacuum venturi type effect helping to draw cooler air into the chimney through som...

Tom Booth wrote: ↑Mon Apr 10, 2023 11:24 am I was curious to see how the linkage might work with just an outer ring connecting the pistons together as originally proposed (without any cams or lobes).

I had the idea of a captive ball bearing for this. Basically a ball at the end of the piston shaft rolling in a track on the ring.

I've been seeing this curious engine for sale online a lot lately. Nice find! It looks a lot like what I had in mind trying to devise a list of supplies for a diy prototype. Basically I thought one could use CO2 canisters for the heating chamber, glass tube for the expansion chamber, epoxy putty pi...

@Tom : nice find! too bad the thread stopped quite early. @dlaliberte : Thanks for sharing ! If I got my mechanics correctly, what's driving my version is a delta in pressure between the pistons that are out of phase from the symmetry axis of the eccentric ring, resulting in a force putting the asse...

I made some animations I hope will better explain the dynamic. Here the red cylinder is the chimney. I left the power-piston/displacer assembly out as it would be time consuming to animate, and it's not really the focus of the design. Engines modules ould be beta, gamma, free-piston or whatnot, the ...

Thank you both for your time reading my post. I spent some time with this, but how or where exactly to position a crank and flywheel seems problematic, how to make mechanical connections between flywheel, piston, displacer with a stovepipe in the way? ... Maybe you could illustrate or describe the f...

Hello there. I'm new! I've been lurking around the topic of stirling engines for some time, trying to see how to integrate it in a scheme of sustainable design. I don't have yet the luxury of being able to test what I have in my mind, but I'd like to share and receive opinions anyway. My training in...

Hi. I saw some flickering leds and heard a beating "tuk tuk tuk tuk tuk" sound, so I entered.