Stirlingengineforum.com

I recently read an article having to do with the snifter valve. They have been used on a variety of engines. The article in question was looking at a Heinrici engine, many of which used the snifter valve. Over time, an engine, whether working or at rest will equalize with atmospheric pressure or co...

Beautiful engine Ian !! By my calculation, your engine has a 96.17:1 ratio. Does that sound right to you ? I also chose a cast iron piston in a cast iron cylinder for my lastest engine after first trying a bellows. The piston / cylinder arrangement was quite an improvement. After making such an eng...

There is a wide range of ratios that will work. Ususally, an LTD engine is in the range of 50:1 to 100:1. You are trying to build an ultra low temperature differential engine. I would suggest a ratio of 60:1 to 61:1. If you do not read the Senft book on this topic before trying to design your own e...

playludesc, the Werdich and Kübler book covers some large LTD engines used as public art. They are interesting. Yours sounds like a formidable project. Good luck to you ! If you build something, please post information about it, whether "successful" or "unsuccessful". We will le...

Try searching Plank at
http://www.tapatalk.com/groups/modelsteam/

They are very interested in such models.

Ernst Plank

To quote the Sherline Tools motto "Think big and build small". If you plan on building such an ambitious project, you should be willing to build up to it and one way or another build or borrow the tools necessary to accommplish it. If you can build even a small alpha engine, then you can ...

playludesc, I too am fascinated at the prospect of building a large LTD engine and so far have written many pages in planning such a project. I am in the process of scaling up an engine in four stages. Currently, I am on the second of four. If after building three successful models of increasing si...

Blaf, some alphas have displacers and since you have not started building yet, I would encourage you to consider the possibility in your design. Usually, this has the result of moving the rings of the the hot piston a good distance from the heat. Directly heating the cylinder and piston is rather p...

Blaf, you may be able to make them work with some handwork. Personally, I would avoid making a power cylinder from stainless steel, but perhaps I have misunderstood you. If you are considering this as the displacer and displacer chamber, then the tolerence is much too close ! Perhaps you could make...

In researching this question, not all researchers come up with exactly the same figures. Please forgive any "errors" in the collected information. It is only meant as a general guide. BTU per pound of some common fuels Hydrogen 52,290 BTU per pound Acetylene 21,850 Propane 21,660 Gasoline...

Wonderful job Thanh-Cuibap ! on the successful gear and the great running engine !

Wayne