Search found 136 matches

by cbstirling2
Mon Feb 19, 2018 8:27 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Blechspielzeug engines
Replies: 1
Views: 17

Blechspielzeug engines

I noticed ministeam is selling this apparently larger model? Any thoughts about it?

https://www.ministeam.com/acatalog/Stir ... ml#SID=342


;)
by cbstirling2
Mon Feb 19, 2018 6:26 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: More volume on the hot side?
Replies: 7
Views: 197

Re: More volume on the hot side?

Ian S C wrote:The cold piston should have as little bulk as possible to enhance the rate of cooling, the crown is only effective on the hot cylinder.
Ian S C
Oh I see, the additional thermo mass outweighs the conduction from surface area?

thanks
by cbstirling2
Sun Feb 18, 2018 5:02 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Making a stirling engine 5 kw generator
Replies: 8
Views: 248

Re: BTU of common fuels per pound

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...
by cbstirling2
Sat Feb 17, 2018 4:26 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: More volume on the hot side?
Replies: 7
Views: 197

Re: More volume on the hot side?

The hot side on my design is quite far away from the hot side, so heat creep shouldn't really be a problem. So if heat really is the only reason, my question is answered. The crown increases the surface area to conduct heat. In my opinion, it's a good idea to have a crown on both pistons. I'd made ...
by cbstirling2
Sat Feb 17, 2018 4:20 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Making a stirling engine 5 kw generator
Replies: 8
Views: 248

Re: Making a stirling engine 5 kw generator

I have a funded project on making a stirling engine 5 kw generator Have you anyone had done or experienced stirling engine that can generate 5 kw can give me some information about the size of the power piston? the diameter of the displacer? engine type: (alpha, beta, or gamma) ?? As much informati...
by cbstirling2
Sat Feb 03, 2018 4:42 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Cant find old website
Replies: 5
Views: 158

Re: Cant find old website

This engine Japan is pretty and a superb runner.
Generates meaningful power.
Less expensive than Boehm as well.
https://www.ebay.com/itm/Desktop-Stirli ... 2136054651
I think the engine had a limited production run as the manufacturing company seems out of business.
by cbstirling2
Sat Feb 03, 2018 4:35 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Cant find old website
Replies: 5
Views: 158

Re: Cant find old website

Quite the contrary. Boehm engines are junk imho. Make it run before you make something pretty.
by cbstirling2
Wed Jan 24, 2018 10:10 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: alpha engine question
Replies: 3
Views: 173

Re: alpha engine question

Well with alpha, both pistons and cylinders can be identical on same crank pin 90 apart.
Displacer is misnomer here. Either hot or cold piston.
by cbstirling2
Sun Jan 07, 2018 8:54 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: First Sterling Finally Running
Replies: 24
Views: 1894

Re: First Sterling Finally Running

6500 rpm that's too fast imho. I recommend placing a load on it to see how many watts you generate. Do this set up: hook up a electric generator (a low voltage motor) via a rubber band belt. Send its power to a lower voltage motor. If the generator is AC, send it thru a bridge rectifier. Measure the...
by cbstirling2
Sat Jan 06, 2018 7:03 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Silver soldering stainless steel hot end
Replies: 12
Views: 399

Re: Silver soldering stainless steel hot end

Oops, the cadium is tocic. I'd steer clear from them.
by cbstirling2
Sat Jan 06, 2018 6:59 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Silver soldering stainless steel hot end
Replies: 12
Views: 399

Re: Silver soldering stainless steel hot end

So NiCd batteries are in a stainless cup?
So to be safe, one must drain the battery?
What happens if one tries to burn the other parts out by tossing them into a campfire?
by cbstirling2
Thu Jan 04, 2018 11:44 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling engines with an internal spring question
Replies: 16
Views: 589

Re: Stirling engines with an internal spring question

Alfista, I just looked at YouTube. Neat gamma engine I saw. Big question, I saw you are able to generate over 12 volts but what about amps? A simple way to test for that is to hook your set up to another motor to act as a load. And then using two multimeters check for voltage as well as amps. Presto...
by cbstirling2
Thu Jan 04, 2018 11:29 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Open crank horizontal engine conversion to Stirling cycle.
Replies: 8
Views: 332

Re: Open crank horizontal engine conversion to Stirling cycle.

I think a horizontal cylinder has too much friction imho.
by cbstirling2
Tue Dec 26, 2017 5:58 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: small wood gassifier generator
Replies: 11
Views: 739

Re: small wood gassifier generator

Crankshaft is parts you don't need. Use a 90 degree split engine on the same pin on a flywheel.
by cbstirling2
Fri Dec 22, 2017 8:22 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: small wood gassifier generator
Replies: 11
Views: 739

Re: small wood gassifier generator

Btw, that Japanese Ross alpha toy that I posted about produces 1 watt of power enough for usb. That's approximately 0.5 inch bore, so an one inch bore may generate 4 watts. The airpel graphite cylinders are 1 inch bore. For a drive train there is a $65 usd toy model off eBay, use the flywheel as the...

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