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	<title>Comments on: Make: how to make a teacup Stirling&#160;engine</title>
	<atom:link href="http://boingboing.net/2009/03/24/make-how-to-make-a-t.html/feed" rel="self" type="application/rss+xml" />
	<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html</link>
	<description>Brain candy for Happy Mutants</description>
	<lastBuildDate>Mon, 20 May 2013 00:09:00 +0000</lastBuildDate>
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		<title>By: GregLondon</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448514</link>
		<dc:creator>GregLondon</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448514</guid>
		<description>I am underwhelmed.</description>
		<content:encoded><![CDATA[<p>I am underwhelmed.</p>
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	<item>
		<title>By: Luc</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448546</link>
		<dc:creator>Luc</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448546</guid>
		<description>It doesn&#039;t so much use the heat as the heat differential to run. You could use ice cubes to create a heat differential with room temperature, and it will run just as well.</description>
		<content:encoded><![CDATA[<p>It doesn&#8217;t so much use the heat as the heat differential to run. You could use ice cubes to create a heat differential with room temperature, and it will run just as well.</p>
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	<item>
		<title>By: Anonymous</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-774722</link>
		<dc:creator>Anonymous</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-774722</guid>
		<description>the problem in starting ur engine may be due to crank shaft and connecting rods..</description>
		<content:encoded><![CDATA[<p>the problem in starting ur engine may be due to crank shaft and connecting rods..</p>
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	<item>
		<title>By: imhotep</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448875</link>
		<dc:creator>imhotep</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448875</guid>
		<description>Why?</description>
		<content:encoded><![CDATA[<p>Why?</p>
]]></content:encoded>
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	<item>
		<title>By: wgmleslie</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448131</link>
		<dc:creator>wgmleslie</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448131</guid>
		<description>I believe the Tata Nano is powered by one of these.</description>
		<content:encoded><![CDATA[<p>I believe the Tata Nano is powered by one of these.</p>
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	<item>
		<title>By: JoshP</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448661</link>
		<dc:creator>JoshP</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448661</guid>
		<description>  I won&#039;t claim to know anything about the physics, but for others attempting this build using the same specs there are &#039;wire bending jigs&#039; that you can procure or make make.  Think of a domino, with the holes that go clean through.  You put pegs in the holes, lines, whatever, and it is a miniature setup to get nice, even consistent wire bends.
  my 2$,
  neat build,</description>
		<content:encoded><![CDATA[<p>  I won&#8217;t claim to know anything about the physics, but for others attempting this build using the same specs there are &#8216;wire bending jigs&#8217; that you can procure or make make.  Think of a domino, with the holes that go clean through.  You put pegs in the holes, lines, whatever, and it is a miniature setup to get nice, even consistent wire bends.<br />
  my 2$,<br />
  neat build,</p>
]]></content:encoded>
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	<item>
		<title>By: macrumpton</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448675</link>
		<dc:creator>macrumpton</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448675</guid>
		<description>I suspect from the reluctance of the engine to run properly (it should run on the hot water or the ice, but not need both) is due to the displacer crank being the wrong dimension. If the crank is too short the displacer will not get close enough to the ends of the displacer cylinder to move the air to the other end of the cylinder, stopping the air from changing temperature/pressure. If the crank is too long the displacer will crash into one or both of the ends of the cylinder and cause nearly catastrophic friction.</description>
		<content:encoded><![CDATA[<p>I suspect from the reluctance of the engine to run properly (it should run on the hot water or the ice, but not need both) is due to the displacer crank being the wrong dimension. If the crank is too short the displacer will not get close enough to the ends of the displacer cylinder to move the air to the other end of the cylinder, stopping the air from changing temperature/pressure. If the crank is too long the displacer will crash into one or both of the ends of the cylinder and cause nearly catastrophic friction.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Anonymous</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448166</link>
		<dc:creator>Anonymous</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448166</guid>
		<description>One step closer to the Infinite Improbability Drive...</description>
		<content:encoded><![CDATA[<p>One step closer to the Infinite Improbability Drive&#8230;</p>
]]></content:encoded>
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	<item>
		<title>By: Dpwhite </title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448679</link>
		<dc:creator>Dpwhite </dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448679</guid>
		<description>i&#039;m waiting for two girls and a sterling tea cup</description>
		<content:encoded><![CDATA[<p>i&#8217;m waiting for two girls and a sterling tea cup</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: rarrr</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-449466</link>
		<dc:creator>rarrr</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-449466</guid>
		<description>@9 A geek never needs a reason other than why not?</description>
		<content:encoded><![CDATA[<p>@9 A geek never needs a reason other than why not?</p>
]]></content:encoded>
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	<item>
		<title>By: knodi</title>
		<link>http://boingboing.net/2009/03/24/make-how-to-make-a-t.html#comment-448238</link>
		<dc:creator>knodi</dc:creator>
		<pubDate>Wed, 30 Nov -0001 00:00:00 +0000</pubDate>
		<guid isPermaLink="false">#comment-448238</guid>
		<description>How many miles to the cup do you get?</description>
		<content:encoded><![CDATA[<p>How many miles to the cup do you get?</p>
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