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A Ringbom engine

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shred:
I found 3/4" solid graphite pencils at a local art store.  That worked well for my little stirling fan.  Maybe not the best grade of graphite, but plenty slippery.

rleete:
Good idea.  Thanks for the tip.

sorveltaja:
Couldn't resist to put trivial quiz about Ringbom engine(s)... Who was the inventor? When did he patented it? What countries it was patented on?

NickG:
I can't see the video here but will have a look tonight. Love the concept of Ringboms as there is only 1 crank, conrod etc - mesmorising and make a unique noise.

Stirling engines are great! As somebody said, all you need is a flame, no inlet or exhaust, just two smooth pulses per revolution and hardly any noise ... mesmorising! When I built mine (only built 1) the buzz I got from seeing it run for the first time was 10 fold that of a steam engine! I modified mine to have a water jacket in the trouble shooting phase as I thought my delta T wasn't big enough. But with help from Jan ridders I found the real problem and it will run without the water cooling now, although it runs for a lot longer with it. I just wish I made a much bigger burner as it only runs for about 8 mins on the tiny burner I made! I may modify the base (drill a hole in it) so I can hide a bigger burner under the base and have the wick poking through.

If anybody is in two minds whether to try it and you have a few small steam engiens under your belt, go for it. Study Jan Ridders website though, there are some invaluable tips on there.

Nick

bogstandard:
Just a quickie  :offtopic: here.

If any of you do ask Jan for one or a few of his plans, please, if possible, make a donation, even if it is only a couple of bucks. Running a site can be a rather costly business when it is coming out of his own pocket. We don't want his site being invaded by even more adverts just to keep it going.

http://heetgasmodelbouw.ridders.nu/index_framelinks_english.htm
 
He is one of the most innovative small engine designers I have come across who DOESN'T CHARGE ANYTHING for all the hard work he puts in. Everything is given freely, not a thing you see much of nowadays, and he is willing to help anyone who has a problem with his engine designs.

Anything we can do to help him keep his site going will be much appreciated by Jan, and all the modelmakers throughout the world he has given so much inspiration and pleasure to.

John

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