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My experience with plastics--Teflon, for instance--is their dimensional changes when the temperature goes up or down. IOW, they have a large coefficient of thermal expansion.

George, your latest creation is a masterpiece, a work of art. Well done!

That's beautiful, Tony! Well done.

If your wicks are burning up, I suggest using either coils of fine stainless steel screen or Fiberglas rope of the type that is use for wood stove door gaskets. Orirn

It depends upon the amount of work it is doing. I have several Stirling engines that will run on the heat from a birthday cake candle. If red heat is necessary to run an "idling" Stirling, there is far too much friction. Orrin

Stan, are my eyes playing tricks on me? I thought I saw you attaching the steam dome with layout blue sandwiched between the boiler shell and the dome. If I am correct, I'm wondering how soldering will pan out. Surfaces should be scrupulously clean before soldering. Therefore, shouldn't...

Well done, Tiny! The design is unique and your craftsmanship is superb! Your Stirling is beautiful. Best regards, Orrin

Beautiful! Congratulations, Don. Your Minnie is an inspiration to us all. Best regards, Orrin

Manfred, I have pictures of the dies that Jim used to stamp the oil pan. Leave me a private message and give me your e-address and I'll e-send them to you. I don't have a photo hosting site, otherwise I'd post the pix for all to see. Regards, Orrin

Dave, I'm not sure my engine deserves your generous words; but, I appreciate them, anyhow. Thank you for making my day. This engine would not run if it had any piston ring friction. Don't worry, you won't have any trouble getting your piston to fit close enough. It just takes a little...

Well done,IronHorse! Congratulations! I'm partial to hot air engines and yours ranks as one of my favorites. Best regards, Orrin

My friend, Don Comstock, builds model Diesels. He is mentioned in this thread: http://www.smokstak.com/forum/showthread.php?t=50410 His son, Terry, posted a video of it running: http://www.youtube.com/watch?v=WOCpgZe87O8 IIRC, Don modifies Oldsmobile Diesel injectors. I've not...

Well done, Mike! Your Wyvern is a beauty! Orrin

Bravo! Congratulations for the recognition you deserve for crafting such a beautiful engine. Well done! Orrin

Beautiful! Well done! Orrin

I love it. It puts my Moriyas to shame. http://users.moscow.com/oiseming/lc_ant_p/PnE_Menu.htm Orrin

Dave, your fixture is a stroke of genius! That's a great idea. Thank you for showing it to us. Best regards, Orrin

Nick, Gunna said... In other words, he meant the scale is 12-inches to the foot, full size. Orrin

I've used JB-Weld with great success. Some people have even used it to successfully repair pitted bores in internal combustion engines. If it can tolerate ignition temperatures, it will most certainly stand up to anything your application will throw at it. Orrin

Dr. Jo, is your avatar a Lady Stephanie? If so, do you know if Reeves still has the castings? Orrin