Stirlingengineforum.com

I stumbled across the term "Rolling Diaphragm", and suddenly I had lots of information about these. I've tried other terms for the thing I had a picture of in my head, but I previously had poor search results.

The power piston is on the other side of the flywheel. The displacer is the common sliding cylinder we are all familiar with. The displacer is actualted by an elevated rocking-beam. The flywheel displacer linkage to the system has an odd-shape to increase dwell time at both ends of the stroke (hot a...

Cheap desktop demonstrator, but he is using ideas I hoped to display someday. Very happy to see this idea working for someone. Power piston is a bellows Displacer is a rotary inside a clear housing (glass cylinder?). A magnetic bar on one end spins the displacer inside the housing. Looks like the ma...

The way I understand it, one of the biggest problems with a hot air engine is how much heat you can get into the working gas, and how much you can get out. If you improve the heat absorption and shedding, you raise the power of the engine, or conversely keep the same power while using less fuel. Let...

StirlingWilcox3.png As the Stirling was patented in 1816, this engine of 1860 hoped to make some improvement on the established benefits of the Stirling. I found it to be interesting and perhaps worth discussion. There is no cooler, and it simply exhausts the used hot air through a regenerator to t...

I recall reading about a scientist that was exploring a remote cave, and discovered an un-listed animal that had six legs. By the rules of animal study, it was an insect, with the number of legs being the most important characteristic above all others. However, it "looked like" a spider. I...

In response to an earlier post in this discussion, I agree that the cold side is less important. The difference between ambient room temperature and a 1500F flame is very close to 1430F degrees. The difference between 70F ambient room Temps and ice water is may 50F? That being said, any inexpensive ...

The company website reported that the fastest they could get it to run well was 1500-RPM. I don't know how accurate that is, but even if its really 10% less, it's likely good enough for any device I might make. I apologize for the potato quality of the drawing. This is what I was thinking for the fi...

I made a few minor changes to the regenerator graphic above (compared to the original graphic in the youtube) to make it more easily understandable to those who are new to Stirlings. xxxxxxxxxxxxxxxxxxx Here is the company for anyone who may wish to research this more https://www.fluidmechanics.co.u...

I have been assured by people who seem to understand these things, that a heat pump is a wonderful thing, rather than using a conventional A/C unit to cool your home, and a gas flame to heat it. That being said... I won't replay the working principle of an Alpha-Stirling here (for the new readers), ...

Part of the 90-degree separation between the pistons is the lag-time for the gasses to absorb and shed heat. You "could" separate the pistons by 180-degrees, so all of the gasses are in the hot side or cold side, but then you'd need a third piston to use the gas temp change to spin the thi...

In the interests of keeping this forum as the "first best reference" for Stirling links, I'm parking a link here to an article I found. Although the author is known for writing sensationalist click-bait stories (and I've heard rumors that he drinks), this particular one was somewhat useful...

Recently, I came to the realization that large and heavy vertical pistons are not a compromise or concession, it is a feature. Pressure lifts both pistons at 90-degrees of separation to each other, but...when the pressure decreases, the falling pistons add two more power pulses to the flywheel at 90...

pic from the web
http://hotairengines.org/images/d/e/8/2 ... -fig-2.png