Search found 92 matches
- Thu Sep 29, 2016 2:39 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 1st post, Never built anything before, have a few questions on Stirling LTD engines
- Replies: 15
- Views: 11039
suggested reading
DrJekyll, you are ready for Dr. Senft's book on LTD engines published by Moriya Press. This process is more easily understood through thermodynamics. A rapid heating and cooling of a fixed volume of air creates pressure and vacuum alternately. These forces are then captured in the "power cylin...
- Tue Sep 20, 2016 1:59 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: basic dimentions needed for gama design
- Replies: 20
- Views: 13532
epoxy piston
Wellington, I think that you could make a close fitting, epoxy piston work in a gamma engine. It would be quite the risk in an alpha but inexpensive to replace ! :eyeroll: Unfortunately, one could not expect an extended lifespan from it, but I believe that it would work with lubrication, and it cou...
- Sat Sep 17, 2016 12:38 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: basic dimentions needed for gama design
- Replies: 20
- Views: 13532
more about piston rings
Here is a little more information on piston rings. I understand that there are many ways to build an engine but it would be a shame to dismiss the topic of piston rings as "something not used" on hot air engines. On smaller engines, it is probably an unnecessary complication. In glass cyl...
- Thu Sep 15, 2016 9:50 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: basic dimentions needed for gama design
- Replies: 20
- Views: 13532
choice of one's first engine
Wellington, I would encourage you to first try your hand at a gamma engine first before trying to build an alpha. The alpha poses the particular problem of building a compound piston & displacer, possibly two of them and possibly sealing a low friction, hot piston & cylinder combination. If...
- Mon Sep 12, 2016 7:40 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: basic dimentions needed for gama design
- Replies: 20
- Views: 13532
dimensions of gamma engine
I refer you to Robert Sier's Notes on Hot Air Engines. It is probably the best one page summary to be found.
http://www.stirlingengines.org.uk/modeng/note.html
- Mon Sep 12, 2016 6:43 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Homemade Engine with Generator
- Replies: 17
- Views: 16639
Re: Homemade Engine with Generator
Alfista, have you tried reversing the pulleys, putting the small one on the crankshaft, and big one on the generator, it will reduce the revs at the generator, but allow the motor to run more freely, with more torque at the generator end. Thank you for your reply Ian. Yes, I have tried that combina...
- Thu Sep 08, 2016 10:01 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Homemade Engine with Generator
- Replies: 17
- Views: 16639
A photo of my homemade engine with generator
Here is a still shot.
- Fri Sep 02, 2016 8:11 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling engine project
- Replies: 8
- Views: 7211
Re: Stirling engine project
I have made several displacers out of aluminum. None have melted or developed problems. There are several good methods for making a displacer. Ian is right to point out the potential problems and inherent disadvantages of aluminum. That said, aluminum is very light and whereas it may be quite easy ...
- Wed Aug 31, 2016 8:45 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Thickness of hot end wall
- Replies: 2
- Views: 3845
My suggestions for wall thickness
My suggestions for wall thickness
1.5" cylinder : .0325" wall
3" cylinder : .05" - .0625"
8" cylinder : .09375"
Of course higher temperatures probably need thicker material.
Good luck !
- Mon Aug 22, 2016 3:38 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Rider and Erricson Engine Plans
- Replies: 2
- Views: 4350
Re: Rider and Erricson Engine Plans
Wellington, there are very nice plans for it to be found in the first volume of "Steam and Stirling Engines" published by Village Press. I am not a shill for Village Press ! :laugh: I just buy a lot of their books, and in fact, in general, I would not recommend this series which is publis...
- Tue Aug 16, 2016 6:13 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Looking for a powerfull horizontal stirling engine model
- Replies: 2
- Views: 4780
Re: Looking for a powerfull horizontal stirling engine model
Wellington, I know that this is not what you are looking for but you can build this. It is a good first engine and it will scale up nicely. If you need the space between the bearing supports, just add a copper tube as in the video you posted. [youtube]https://youtu.be/mUr6rsNgBU0[/youtube] .562&quo...
- Mon Jul 18, 2016 6:37 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Homemade Engine with Generator
- Replies: 17
- Views: 16639
reply to Ian
A couple of suggestions: if you want to try more fly wheel, You could loose a bit of weight possibly on the crank webs, Ian, thank you for your post. You may not have noticed the last couple videos with the larger flywheel, although a bit too large at 16" it did make a nice improvement. One o...
- Mon Jul 18, 2016 5:58 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Homemade Engine with Generator
- Replies: 17
- Views: 16639
reply to Ledlights
Ledlights Thanks for your kind words about the engine. You make a good point about trying to push the engine. In the original of the load test video, the sound quality made it much easier to hear the effect of the generator load on the engine at the moment when the battery is connected to the gener...
- Fri Jul 15, 2016 7:01 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Homemade Engine with Generator
- Replies: 17
- Views: 16639
Re: Homemade Engine with Generator
No, of course not. If it did, there would be no significant voltage drop.
- Thu Jul 14, 2016 3:25 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Homemade Engine with Generator
- Replies: 17
- Views: 16639
Running without a load
Finally, a short clip of the engine running without a load.
[youtube]https://youtu.be/1JlFJJ9KFg4[/youtube]