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What about flared ends, like on hydraulic tubing?

Hey, It's me again. I checked Sunpowers website. The EE-80 is 95 Watts output, 3.7kg (8.1lbs), 193mm long (7.5 inches), and 69mm diameter (2.7 inches) Oh yeah, that would work!

<t>Hi Mike! Perhaps one, or a small group of free piston Stirling generators would do the trick? Sunpower Inc. has the EE-80 and EE-80-H generators that are about 100 watt output. I don't know about their size, but 2 of those would get the power output you're looking for. A small campstove propane t...

<t>I'm in the same boat as you. I am simply an enthusist and hardly an expert on anything. You are correct in that most of the old steam engines worked on an open cycle, as opposed to a closed cycle like in the Stirling. A Stirling using steam as the working fluid would work, but keeping the tempetu...

<t>The problem with useing water (Or steam as the case may be), is that to turn water from ambient (room) temp to 100deg c (boiling) takes a lot of energey. This is called SPECIFIC ENTROPY. By useing a gas as the working fluid (air, co2, nitogen, or whatever), you avoid this problem. That is the pri...