Search found 16 matches

by mhafele
Sat Feb 24, 2018 11:36 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Propane burner design
Replies: 7
Views: 3203

Re: Propane burner design

James G. Rizzo also discusses burners in his books on hot air and Stirling Engines, Vol 1 & 2 of "The Stirling Engine Manual", and "Modelling Stirling and Hot Air Engines". Ian S C [img] DSC00839%20(640x480).jpg [/img] Been reading rizzo's book. Briefly discusses burner design. Guess I'm looking fo...
by mhafele
Thu Feb 22, 2018 9:19 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Propane burner design
Replies: 7
Views: 3203

Propane burner design

Any recomendations for literature on propane burner design?

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by mhafele
Sat Feb 17, 2018 7:53 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: New flame eater with homemade gear
Replies: 8
Views: 3341

Re: New flame eater with homemade gear

Thanh, how do you cut such narrow and thin cooling fins? When I try to turn in aluminum a .062 wide gap and .062 fin with a .062 parting tool the fin bends over while cutting. Cut also stalls out lathe and belt slips. With .125 cut and .125 fin I have no problems. Thanks, Sent from my SM-N950U usin...
by mhafele
Fri Feb 16, 2018 5:09 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: New flame eater with homemade gear
Replies: 8
Views: 3341

Re: New flame eater with homemade gear

Thanh, how do you cut such narrow and thin cooling fins? When I try to turn in aluminum a .062 wide gap and .062 fin with a .062 parting tool the fin bends over while cutting. Cut also stalls out lathe and belt slips. With .125 cut and .125 fin I have no problems. Thanks, Sent from my SM-N950U using...
by mhafele
Thu Feb 08, 2018 6:48 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Gamma Fan #2
Replies: 5
Views: 2930

Re: Gamma Fan #2

I just pick a number and build, well not quite, I wanted a fairly small angle on the con rod, so the 20 mm stroke, this also allows reasonably high revs, and I think a short stroking motor does not need a very large flywheel, this motor uses the fan as it's flywheel, and the blades on that are quit...
by mhafele
Wed Feb 07, 2018 5:11 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Gamma Fan #2
Replies: 5
Views: 2930

Re: Gamma Fan #2

My fan runs at 600rpm to 800rpm on the hot plate of an electric stove, power piston is 30 mm dia X 20 mm stroke, and the ratio is 1.5 : 1. Ian S C [img] Test%20053%20(800x600).jpg [/img] Ian, how do yo decide on piston stroke? I've been picking a piston diameter by the available material available,...
by mhafele
Mon Jan 29, 2018 6:59 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Gamma Fan #2
Replies: 5
Views: 2930

Gamma Fan #2

5:1 ratio, will try same design with 1.5:1 next. Didn't get much better rpm between 20:1 and 5:1 with similar design.

What variables affect rpm the most? Thinking my vertical displacer might be too heavy.



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by mhafele
Fri Jan 19, 2018 5:32 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling on Mars
Replies: 1
Views: 1316

Sterling on Mars

http://www.world-nuclear-news.org/ON-NA ... 11174.html

This is pretty amazing.

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by mhafele
Sat Jan 13, 2018 7:55 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: First Sterling Finally Running
Replies: 24
Views: 9033

Re: First Sterling Finally Running

With the twenty to one ratio, the motor will run on a lower temperature. I stick mine on the electric stove evert now and then while I cook my lunch, or put the LTD motor on top of the pot of vegetables while they cook. Ian S C Starting to design #3. Want to try vertical again with a 5:1 ratio to g...
by mhafele
Wed Jan 10, 2018 4:59 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: First Sterling Finally Running
Replies: 24
Views: 9033

Re: First Sterling Finally Running

On the top motor you might be able to put a fan driven by the engine to blow across the power cylinder, it doesn't take much air movement to move quite a bit of heat. You might be able to fit a pulley beside the flywheel. That is the main draw back with that design of motor, no plain shaft sticking...
by mhafele
Sun Jan 07, 2018 10:33 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling #2 , Vertical Gamma Fan
Replies: 0
Views: 2325

Sterling #2 , Vertical Gamma Fan



600rpmImage

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by mhafele
Sat Jan 06, 2018 2:35 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: First Sterling Finally Running
Replies: 24
Views: 9033

Re: First Sterling Finally Running

Runs good with propane torch. Any tips on running with less heat? Or how to get it to run longer without over heating? https://uploads.tapatalk-cdn.com/20171008/781d195996f476f52fae6c778416841d.jpg Sent from my SM-N950U using Tapatalk Number 2 running, Vertical Fan, 400RPM https://youtu.be/FVZuJwh_...
by mhafele
Tue Nov 28, 2017 7:04 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: First Sterling Finally Running
Replies: 24
Views: 9033

Re: First Sterling Finally Running

That's excellent speed, just needs a bit of engineering to redesign the hot end. If you haven't broken something, you are not really trying hard enough, the hot end probably needs to be brazed into the flange, what is the hot cap made of? Ian S C Hot cap is mild steel tube turned down to make it th...
by mhafele
Sun Nov 26, 2017 3:42 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: First Sterling Finally Running
Replies: 24
Views: 9033

Re: First Sterling Finally Running

Did some tweaking and reached 6500 rpm. Until the hot cap blew off. Was held in with high temp lock tight but I was using propane torch. Guessing it got to hot.Image

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by mhafele
Sun Oct 08, 2017 11:20 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: First Sterling Finally Running
Replies: 24
Views: 9033

Re: RE: First Sterling Finally Running

Runs good with propane torch. Any tips on running with less heat? Or how to get it to run longer without over heating? https://uploads.tapatalk-cdn.com/20171008/781d195996f476f52fae6c778416841d.jpg Sent from my SM-N950U using Tapatalk Here is video link. https://youtu.be/oOg6BuUzP78 Sent from my SM...