Search found 14 matches

by Agent86
Tue May 26, 2009 5:01 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

Re: I've started building my walking beam 55 gallon drum

I've not posted in a long time, but the project is still on.

I'm finally getting to work on this project.

I'll post back the vid once it's finished and I plan to use frensel lenses to try and power it during the day time if I can

Anyhow FYI
by Agent86
Sat Aug 09, 2008 8:54 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

Two compartment displacer

Hi I was thinking perhaps, 2 separate chambers 1) hot, and 1) cold and only connected perhaps with a pipe, So the hot are should still expand, and the cold should still contract, and the pipe which connects the 2 separate displacement containers would have a heat/exchanger neutralizer which would I ...
by Agent86
Tue Jul 01, 2008 5:58 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pistons and other parts
Replies: 1
Views: 4914

Re: Pistons and other parts

Mountain Stirling wrote:I have a metal lathe and milling machine if anyone needs anything made. Send me the spec.s and I will get back with you.
Thanks :D
Nice gesture, I may need a piston for my 55 gallon drum design.

I'll know better once I get the 55 gallon drum displacer finished.
Thanks for the post
by Agent86
Thu Jun 26, 2008 6:56 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

Displacer designs continued

Cartech- Thanks for the reply. All ideas are good they help me collect my thought and even come up with other ideas. Thats good to know about the air flow thru the displacer not being to free, and having some restriction. This is great news. Yes to the 2/3rds. I'm not sure what you mean by LTD I'm g...
by Agent86
Sun Jun 22, 2008 5:03 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

Displacer ideas

Agent86, I'm no expert either and have just two working models under my belt. From what I have read, the mesh is usually steel wool and some times Scotch Brite pads but these are being used in models not large engines (to my limited knowledge) Maybe a suitable regenerator/displacer for you engine c...
by Agent86
Sat Jun 21, 2008 6:04 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

Displacer ideas

Not a bad idea at all but it will need to increase the power a fair amount to offset the extra energy required to run it. The weight and friction of plumbing fittings etc. I know your taking about a pretty large scale engine here and maybe it's less of a factor but it will add extra effort to your ...
by Agent86
Fri Jun 20, 2008 11:54 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

Displacer Designs ?

As far as I understand it, a regenerator is a very good idea - the efficiency you will achieve without one will be abysmal. Not sure on the best type but you could either go for something like steel wool or mesh screens inside the displacer itself (ie so the air is forced through holes in the displ...
by Agent86
Wed Jun 18, 2008 4:03 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

RE: Formulas

fokker - thanks I'll do that Basically I guess I'm trying to get a simple idea of what my working design should look like on paper. My displacer currently will be a 55 gallon drum, and piston size will be made from some pvc probably 4 inch piston for starters, and if that piston proves too large, th...
by Agent86
Tue Jun 17, 2008 6:44 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

Piston Formula

You may find the following formula useful: Vmax/Vmin = 1 + ((Tmax-Tmin)/1100) Where Vmax and Vmin indicate the maximum and minimum power piston volumes (ie. at top of stroke and at bottom of stroke). Thanks, Please clarify this a bit. What does Tmax-Tmin refer to ? temperature ? Perhaps I can toy w...
by Agent86
Sat Jun 14, 2008 10:00 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Five Cylinder Stirling Engine
Replies: 7
Views: 9137

Displacer and Displacer Piston ?

Thank you! You need large cooling/heating surfaces (heat flow) in order to quickly (power) cool/heat a big ammount (power) of air inside the engine's pressure vessel. Somewhere over the interwebs, i picked up, that the swept volume of the working piston (WP surface x WP travel) should equal one qua...
by Agent86
Fri Jun 13, 2008 7:32 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: I've started building my walking beam 55 gallon drum
Replies: 25
Views: 24486

I've started building my walking beam 55 gallon drum

Hi all I'm not sure exactly which ratio the displacer to piston should be, or if the piston is better to have long stroke or shorter stroke. In anycase if I need to add dispacer volume, then I'll use 2 drums in parallel working together and perhaps union them together with a T both going into the he...
by Agent86
Sun Jun 08, 2008 10:23 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Walking beam design advise ?
Replies: 0
Views: 5649

Walking beam design advise ?

Hi all I'm curious about the walking beam design. I'm currently gathering my parts for a huge model built from a 55 gallon drum and perhaps 4 inch piston, then later perhaps out of a larger huger drum. This should be fun. My flywheel and linkage will be a standard bicycle, but must be hard linked no...
by Agent86
Sun Jun 08, 2008 10:12 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Five Cylinder Stirling Engine
Replies: 7
Views: 9137

Nice

I like it too, Curious about the heat temperature, perhaps hot water heating the bottom portion ? Could that be sufficient to heat the bottom area to about 170-200 degrees, and the top upper portion I'm going to use my own design of cooling at around 45-50 degrees. I'm curious if it will run with th...
by Agent86
Sun May 25, 2008 6:47 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Five Cylinder Stirling Engine
Replies: 7
Views: 9137

How much power output on this ?

Hi, this is nice design. I'm gathering info to build my first mini Stirling engine. I'm planning on building a huge one at my house if I can get these small various ones working correctly Can you tell approx. how much power this 5 cylinder engine might have at low heat ? Please advise on any info Th...