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Old 02-16-2010, 09:21 PM   #916
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Old 02-16-2010, 09:57 PM   #917
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Old 02-17-2010, 03:24 PM   #918
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Where I work "Gundecked" = "pencilwhipped"
I've also heard it called "The Magic Pen"
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Old 02-17-2010, 08:15 PM   #919
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Running from the heat of his hand..




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Old 02-17-2010, 08:29 PM   #920
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Running from the heat of his hand..







I've toyed with the idea of making an up scale model using mirrors to reflect sunlight on one side of it and use it to run a small generator to charge the batteries for and electric bike.
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Old 02-17-2010, 08:32 PM   #921
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Quote:
Originally Posted by EvilGenius
I've toyed with the idea of making an up scale model using mirrors to reflect sunlight on one side of it and use it to run a small generator to charge the batteries for and electric bike.
Toyed being the key there. Stirlings capable of meaningful work are a bit rare.
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Old 02-17-2010, 09:37 PM   #922
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Toyed being the key there. Stirlings capable of meaningful work are a bit rare.
Sure.

I wonder as they get bigger how much more heat they need to perform a certain amount of work.

Obviously the thing isn't going to start running by itself, but maybe with the right size fly wheel and a good spin it could keep itself going and get something done.
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Old 02-18-2010, 01:52 PM   #923
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Top 10 uses for a stirling engine. My favorite is as a submarine engine.

http://www.discoverthis.com/article-...ine-top10.html
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Old 02-20-2010, 10:38 AM   #924
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Originally Posted by FloridaSteve
Top 10 uses for a stirling engine. My favorite is as a submarine engine.

http://www.discoverthis.com/article-...ine-top10.html
Badass.

#2 is exactly what I'm interested in.
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Old 02-25-2010, 11:41 AM   #925
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Quote:
Originally Posted by EvilGenius
Badass.

#2 is exactly what I'm interested in.
Except that if it ran maintenance free for 100 years, it would still be way behind breaking even on costs.
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Old 02-25-2010, 07:20 PM   #926
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I think it's got something to do with the difference between the energy level (heat) inside the engine compared to that of the level of entropy surrounding it. If this difference is low, only relatively little work can be produced. (Second Law of Thermodynamics)
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Old 02-25-2010, 10:03 PM   #927
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Old 02-25-2010, 10:06 PM   #928
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. . .

Swanky!
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Old 02-26-2010, 11:31 PM   #929
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Hot air

[IMG][/IMG]

Stirling hot air engine as used in a submarine.

It uses a hot plate under the engine to heat air which as diagram explains causes motion. The engine runs surprisingly fast but is absolutely gutless, you can stop the flywheel with your hand! Apparently it was donated to the Perth Maritime Museum from a submarine of Scandinavian origin and was used when submerged as it uses no oxygen/air. No idea what for.

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Old 02-26-2010, 11:36 PM   #930
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Beam engine - steam

Another of the exibition at the museum.

Notice the spinning dumb-bells, its used as a throttle, as the engine speeds up centrifugal force causes the balls to move outwards and adjust the "throttle" slowing the engine speed. This model is about 25 cm big and is amazing to see workiing in real life.

[IMG][/IMG]

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