Stirlingengineforum.com

Slip mechanism: https://m.youtube.com/watch?v=P0JWvEQPUJs

And cam: https://m.youtube.com/watch?v=8QE-CmKxz40

The first LTD Stirlings had a slip mechanism to increase "dwell" of the displacer so that it would linger at the hot and cold side and move more suddenly from one side to the other.

A cam could be used to produce a similar displacer motion.

In a four cycle IC engine that initial spark/ignition/sudden explosion... has to carry the engine through several cycles against considerable resistance including a compression cycle and whatever load happens to be on the engine. The timing in a Stirling could be controlled by having the displacer r...

I'm more familiar with IC engines than Stirling, but IMO timing is critical. In an IC engine if the timing is off by just a few degrees the engine could stall under any kind of load. It seems to me that Stirling engines act quite like an IC engine that is rather badly out of time. That is, lacking t...

You can make the displacer directly with panels of ceramic fiber. It's stiff and light weight, and easy to work. I see some online sources for ceramic fiber of various types/brands/compositions Ebay, Etsy... some appears to be flexible (comes in rolls). Also, is it permeable ? Could air get through...

For example: https://m.youtube.com/watch?v=jnNnoEKyrC4

I've been considering making various engine parts out of a mixture of perlite and waterglass (sodium silicate) often used as a DIY furnace cement. This should, I think, be both lightweight and heatproof. There are several YouTube videos on how to make this cement. I've had several styrofoam displace...

In all engines I've previously seen of this or similar type, the choke is located very close to the heat source.. My impression being that this is necessary in order to force an air stream into the regenerator for heat exchange. If this is the case then the hole in the bottom of the tuna can would o...

For anyone who might be interested I have posted an Indigogo campaign to raise funds to build a prototype Stirling Engine. I've been theorizing on this subject for years and if possible would like to move beyond just theorizing an making sketches and such and do some real testing. According to Tesla...

Compression of a small amount of air can generate considerable heat.

https://www.youtube.com/watch?v=htObjxzwLBQ

The power is still going to be measured in Milli Watts, rather than Watts. Ian S C An LTD type engine might not be the best design. An alpha or some other type might due just as well or better, but I always thought seeing was believing. That large LTD in the video Aviator168 posted is driving a 150...

Ah, and here I thought it was an original idea.

A perpetual machine? Presumably no matter how feeble the engine, it could operate some kind of little air compressor. So some warming and cooling effect above and below ambient should be possible, if for example the engine were started initially by setting it atop a block of ice. Something would ha...

Thanks! very cool.

To Illustrate: LTD_with_air_cycle.gif A simple LTD Stirling with a little air-pump for an air-cycle heating and refrigeration unit. That is of course simplified. The hot and cold heat exchangers would consist of coils of tubing looping around the top and the bottom of the engine rather than straight...