Search found 66 matches
- Mon Aug 21, 2006 12:00 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: cylinder ratios
- Replies: 14
- Views: 71452
Hi Wayne, Welcome to the forum! A couple of simple formulae to keep in mind. 1) The displacer cylinder is ideally divided into 1/3 cool and 2/3 hot. The displacer itself should be about 2/3 the total length of this cylinder. Also the ratio between the displacement volumes of the two cylinders is 33%...
- Mon Jul 24, 2006 6:17 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Dual Acting Cylinders
- Replies: 27
- Views: 27255
Stan, I started thinking about your notes and I admit that I will have to chew on that design a bit more before I try to build it. I agree that it seems straight forward at first glance, but think you may be right that since pressure changes on both sides may not always be reciprocal there could be ...
- Mon Jul 24, 2006 6:09 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: First Test Successful
- Replies: 2
- Views: 21341
- Fri Jul 14, 2006 12:57 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: mounting distances for heat/cooling tanks?
- Replies: 4
- Views: 30947
I think its safe to say that increased heat and cold will generate more power per stroke. HOWEVER, there is a practical limit. Take a LTD (low temperature differential) engine as an example: I wouldn't recommend putting a propane torch on the hot side of one of those as the tolerances and materials ...
- Fri Jul 14, 2006 12:47 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Displacer motion
- Replies: 9
- Views: 67525
- Thu Jul 13, 2006 5:16 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: mounting distances for heat/cooling tanks?
- Replies: 4
- Views: 30947
Jumpers, While I haven't built this particular engine, I can confidently make some suggestions. The purpose of the fire box and the water tank is to provide a temperature gradient across the displacer cylinder. The greater the differential, the more efficient the engine will be. As a general rule, I...
- Wed Jul 12, 2006 11:11 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Flywheel sources are abundant
- Replies: 1
- Views: 29097
- Wed Jul 12, 2006 11:08 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Displacer motion
- Replies: 9
- Views: 67525
I'm in the process of building a second engine with the same specifications as my test bed engine. When completed, I plan to modify the original to use an intermittent movement displacer. I also just got done building an electronic counter that allows me to measure the RPM of my engines without inte...
- Sun Jun 25, 2006 2:40 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Commercial uses for Stirling Engines(?)
- Replies: 10
- Views: 52523
- Thu Jun 22, 2006 10:20 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Displacer type stirling engine
- Replies: 3
- Views: 49242
Dave - What you are describing is a low temperature difference (LTD) Stirling engine. There are a few designs out on the internet, but few are free. Here's one that I've found (but haven't tried personally) http://www.pureenergysystems.com/os/StirlingEngine/photologie/index.html Another more convent...
- Thu Jun 22, 2006 10:07 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Displacer motion
- Replies: 9
- Views: 67525
A rotary displacer doesn't provide an intermittent heating and cooling cycle: it remains sinusoidal, which is my original concern. Keep in mind that there is a good reason that the Wenkel (rotary IC engine) hasn't supplanted the standard piston models: they are more expensive to manufacture and much...
- Thu Jun 22, 2006 10:00 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: New design
- Replies: 1
- Views: 32585
- Wed Jun 21, 2006 1:10 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Displacer type stirling engine
- Replies: 3
- Views: 49242
Hi Dave, Welcome to the forum and the Stirling engine building hobby! First off, glass syringes and test tubes are an excellent material for power cylinders not made on a lathe. Be sure your piston is air tight and that you do not use any form of lubricant in the cylinder. To answer your question, I...
- Sun Jun 11, 2006 9:44 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Dual Acting Cylinders
- Replies: 27
- Views: 27255
My thought was that this configuration could develop power similar to a normal paired two cylinder configuration with the advantages of having only one output crank and less friction from having only one power cylinder/piston. I've seen a double hot capped alpha using only one power piston but that ...
- Thu Jun 08, 2006 9:22 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Dual Acting Cylinders
- Replies: 27
- Views: 27255