Search found 280 matches
- Sun May 28, 2023 10:23 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stephenz's work
- Replies: 58
- Views: 17038
Re: Stephenz's work
The Stirling bros made a pressurized double-acting engine with a segmented regenerator. If I remember the literature right, they filled-in the spaces between with broken glass to minimize dead-space. The duct itself contributes to regeneration; but since it is also a short it seems that at least in ...
- Thu May 25, 2023 9:00 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 55-gallon barrel Stirling
- Replies: 22
- Views: 23794
Re: 55-gallon barrel Stirling
Not the best picture, but It’ll have to do for now. I mighta finally got pictures figured out to maybe do better later. You can sorta see the door across from the chimney where a standard 4” pipe slips over. (That matches my existing shop stove.) The piston sitting on the chamber fits inside with ab...
- Wed May 24, 2023 7:03 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 55-gallon barrel Stirling
- Replies: 22
- Views: 23794
Re: 55-gallon barrel Stirling
VincentG, yes the tube I bought seems somewhat more plasticy than rubbery and there well might be better tubes available. I have no idea yet how it will handle various tortures, and am very dubious about the durability. That said; the 20 inch by 1.75-2.25 tube stretched tight around the 21 1/8 inch ...
- Tue May 23, 2023 7:09 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Portable generator to Ringbom converstion
- Replies: 32
- Views: 8734
Re: Portable generator to Ringbom converstion
The tuning I’m referring to would be the force to move a certain weight and aero resistance (the displacer) at a certain speed with a certain pressure — as in how much of the pressure pulse needs to be sacrificed, (the displacement of the displacer drive) and is it a consistent value through differe...
- Mon May 22, 2023 7:45 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Portable generator to Ringbom converstion
- Replies: 32
- Views: 8734
Re: Portable generator to Ringbom converstion
I’m thinking about doing a Ringbom for my own project, and have looked at a lot of different “expert” advice on the displacer-drive science/magic. There’s no question it works, and of course I get the pressure/displacement premise, but available tuning advice looks like mostly a bunch of buffoonery....
- Mon May 22, 2023 3:39 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 55-gallon barrel Stirling
- Replies: 22
- Views: 23794
Re: 55-gallon barrel Stirling
Thanks Tom. I’ll get the pictures done soon. Vince, the inflatable rolling seal might have another name. A photo won’t help much for understanding because other than the valve-stem, it’s hidden. But when you see it drawn in cross-section it’s obvious. Here’s where I first saw it: https://patents.goo...
- Sun May 21, 2023 6:22 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 55-gallon barrel Stirling
- Replies: 22
- Views: 23794
Re: 55-gallon barrel Stirling
Well shoot it looks like I need to shrink the pictures somehow. I have a couple here on my i-pad which I barely know how to use. I got it to replace my busted p.c. and my son was going to help me learn — just before he got married and moved out. I run chainsaws; he runs computers.
Bumpkin
Bumpkin
- Sat May 20, 2023 5:34 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 55-gallon barrel Stirling
- Replies: 22
- Views: 23794
55-gallon barrel Stirling
55-gallon barrel Stirling. Years after admitting defeat on a prior attempt at a practical engine, I’ve grown foolish enough to try again. Aside from some low-tech steampunk fun, “practical” would mean cogeneration to replace my wood-burning shop stove. It would need to use standard 16 inch wood with...
- Sun May 14, 2023 10:50 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Engine Pressurization
- Replies: 155
- Views: 32584
Re: Engine Pressurization
I’ve called the ratios different things at different times. There are times it matters and times it doesn’t. I favor Tom’s definition of compression ratio as the total system volume change; accepting that pressure is entirely different, with exchanger/regenerator effects on compression heating. Many...
- Sat May 13, 2023 3:07 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: [Translating resource] 100W class LTD Stirling engine( Lesson 5-3 )
- Replies: 32
- Views: 9665
Re: [Translating resource] 100W class LTD Stirling engine( Lesson 5-3 )
OK Vincent. Out of respect for your demonstrated intelligence I persevered and finally interpreted. (See how respect works Matt?) And Vincent, your language might well be the way to go, but in my language — When you say 1.1 to 1, evidently that’s the same as me saying 1 to 11. As in obverse of some ...
- Wed May 10, 2023 11:10 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: [Translating resource] 100W class LTD Stirling engine( Lesson 5-3 )
- Replies: 32
- Views: 9665
Re: [Translating resource] 100W class LTD Stirling engine( Lesson 5-3 )
OK guys. Vince, I thought you’d given one ratio: (approx 1 to 1) for compression, and then other ratios, (about 1 to 6 or 1 to 9) for the entire volume, which I can’t see the difference. And Matt, sorry I didn’t see you were talking about the spring tension external of the thermal system. I’ll go aw...
- Wed May 10, 2023 10:45 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: [Translating resource] 100W class LTD Stirling engine( Lesson 5-3 )
- Replies: 32
- Views: 9665
Re: [Translating resource] 100W class LTD Stirling engine( Lesson 5-3 )
Yeah I could have said that better. I need to quit using cutesy mental short-hand in mixed crowds. Anyway Vincent, since you’re here and we’re talking ratios; you said in another way-back thread: “I have done further testing with the power of the piston to lift weight over simmering water and ice wi...
- Mon May 08, 2023 10:15 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Engine Pressurization
- Replies: 155
- Views: 32584
Re: Engine Pressurization
Well, everything about a Stirling engine is an art in compromise, so nobody’s an expert, but I’ll submit my two cents. Unless you’re running a focused high temperature, the relative size of the burner/exchangers will dwarf the actual engine, so I have to wonder at the importance of specific displace...
- Sat May 06, 2023 9:22 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: [Translating resource] 100W class LTD Stirling engine( Lesson 5-3 )
- Replies: 32
- Views: 9665
Re: [Translating resource] 100W class LTD Stirling engine( Lesson 5-3 )
Golly Matt, you know lots of words and stuff.
Respect and thanks to gitPharm01 for this thread and your time and trouble.
Bumpkin
Respect and thanks to gitPharm01 for this thread and your time and trouble.
Bumpkin
- Sat May 06, 2023 4:51 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Pressurization
- Replies: 27
- Views: 32763
Re: Pressurization
Welcome to the forum stephenz. Ian used to be one of our most prolific posters but he hasn’t been here for a few years. The timing sorta matches the pandemic but? I don’t know. He’s missed.
Hope you can resolve your question.
Bumpkin
Hope you can resolve your question.
Bumpkin