Search found 144 matches

by vile_fly
Sat Mar 10, 2012 10:09 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: another displacer material--aerogel.
Replies: 13
Views: 9129

Re: another displacer material--aerogel.

The reason for posting the question is that I DID go to that site first. Sure is a lot of trouble and expense to make your own aerogel, though. I haven't got that kind of time to spare, and I don't have a chemical hood with the required safety precautions. I'll end up poisoning myself to death. I tr...
by vile_fly
Fri Mar 02, 2012 6:31 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Problem with drafts and saving PLEASE HELP
Replies: 3
Views: 3176

Re: Problem with drafts and saving PLEASE HELP

Early on....I had to set my settings to automatically log me in everytime I visit in order to keep my posts from timing out. I never got the "too few characters" response, but it helped dramatically.
I eagerly await details of this engine design you speak of.
by vile_fly
Tue Feb 21, 2012 9:22 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: v-ring crankshaft seals
Replies: 7
Views: 4950

Re: v-ring crankshaft seals

Just make sure you don't try building a baby Deltic engine. You'll go crazy with 6 sets of 3 cylinders with 2 pistons per cylinder, no cylinder heads and 3 crankshafts (2 CW rotation, 1 CCW rotation) :mrgreen:
by vile_fly
Sun Feb 19, 2012 10:48 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: v-ring crankshaft seals
Replies: 7
Views: 4950

Re: v-ring crankshaft seals

Stretch-fit Rotary Seals http://images1.mcmaster.com/Contents/gfx/large/9562kp1l.png?ver=30191326 http://images1.mcmaster.com/Contents/gfx/large/9562kl1l.png?ver=30359044 http://images2.mcmaster.com/Contents/gfx/large/9562kl2l.png?ver=3035919 You can stretch these to fit over a shaft, while the flex...
by vile_fly
Sat Feb 18, 2012 8:13 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: v-ring crankshaft seals
Replies: 7
Views: 4950

Re: v-ring crankshaft seals

Yep, these are teflon/PTFE seals. I found nitrile seals in my english size at another site. http://www.sealsales.com/packing/vpacking10.shtml I would rather find them in teflon, but the nitrile can seal against thousands of psi. use 3 to seal from 0 to 500 psi. Just stack more if you have a sealing ...
by vile_fly
Sat Feb 18, 2012 1:06 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: v-ring crankshaft seals
Replies: 7
Views: 4950

v-ring crankshaft seals

http://images2.mcmaster.com/Contents/gfx/large/9572kc1l.png?ver=30358813 http://images1.mcmaster.com/Contents/gfx/large/9572kp1l.png?ver=27871964 I am eyeballing these v-ring seals for my v-twin stirling engine so I can pressurize it. The crankcase must have a thrust surface to seal against these, ...
by vile_fly
Fri Feb 10, 2012 7:19 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Found: NASA'S stirling engine dodge D150.
Replies: 1
Views: 2429

Found: NASA'S stirling engine dodge D150.

Found this neat article. I think this might be the V4X engine. http://blog.hemmings.com/index.php/2010 ... dge-d-150/
by vile_fly
Fri Feb 10, 2012 6:44 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: specifications of stirling engine
Replies: 13
Views: 8255

Re: specifications of stirling engine

43 KW is as close as it gets. See this link. http://www.stirlingbiopower.com/STIRLING/BASSE.swf
Good luck on finding a retail price instantly. Most places do not publish an upfront price on their very big stirling engines.
I am guessing the price is around $52,374.
by vile_fly
Sun Feb 05, 2012 9:58 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Large stirling engine
Replies: 9
Views: 13106

Re: Large stirling engine

Here's a very large stirling engine. http://youtu.be/duuk_r--lqU I copied the information from this site's 1st page. http://www.solarheatengines.com/ It uses the phillips rolling sock seal on the power piston. With a short stroke, of course. It appears to be a beta engine, I think. I posted the mome...
by vile_fly
Mon Jan 23, 2012 6:27 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: A new Stirling engine concept ?
Replies: 29
Views: 17571

Re: A new Stirling engine concept ?

An interesting concept, but I am not so sure it is original. I may have seen it before in a paper years ago. In their design, they didn't pay attention to dead space and displacement in the engine, and it performed poorly as a result. But the concept and math was right. Just not the application of t...
by vile_fly
Sun Jan 22, 2012 9:51 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: A Poor Man's Dynamic Balancer
Replies: 6
Views: 5387

Re: A Poor Man's Dynamic Balancer

A degree wheel can be printed up as polar graph paper from this site. It also has tons of other styles of graph, dot, polar, notetaking types of graph paper you can download. It has been very useful to me. I am posting this in the links area, too. http://incompetech.com/graphpaper/ Now, you can tran...
by vile_fly
Sat Jan 21, 2012 11:30 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: A Poor Man's Dynamic Balancer
Replies: 6
Views: 5387

Re: A Poor Man's Dynamic Balancer

Oh, I forgot.....a digital fish scale would work if you need a strain gage unit. They have a better spread in terms of weight, and are cheap. The cheapest ones have a lower than 10lb (4.5 kg).
by vile_fly
Sat Jan 21, 2012 9:00 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: A Poor Man's Dynamic Balancer
Replies: 6
Views: 5387

Re: A Poor Man's Dynamic Balancer

Building a prony brake, Ian? The best place for digital scales for me was the local grocery store or cooking supply shop. Chefmate is what brand mine is. It goes to 2kg, and has tare weight button and a timer. I use it for everything, including cooking and mead making.
by vile_fly
Tue Jan 17, 2012 9:51 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: A Poor Man's Dynamic Balancer
Replies: 6
Views: 5387

A Poor Man's Dynamic Balancer

I finally found an article on how to make a dynamic balancer for crankshafts, driveshafts, shaft-shafts, etc. The link is here. http://www.antiqueautoranch.com/montana500/septnewsletter/page4.html I am applying my automotive knowledge here, so bear with me. This procedure was explained to me as a k...
by vile_fly
Sun Dec 18, 2011 9:53 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Weak conical springs to increase thermal conductiivity
Replies: 2
Views: 2905

Re: Weak conical springs to increase thermal conductiivity

Perhaps I could use a copper coated stainless spring for the hot side, assuming it is possible to coat stainless with copper. Nah, probably would flake off in the high temps. I was mostly trying to get more heat to transfer to the working fluid via the springs. I normally would try to use metallic f...