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	<title>Noisebridge - User contributions [en]</title>
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	<updated>2026-04-05T02:48:55Z</updated>
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		<id>https://wiki.extremist.software/index.php?title=Parachute&amp;diff=10162</id>
		<title>Parachute</title>
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		<updated>2010-03-08T05:02:39Z</updated>

		<summary type="html">&lt;p&gt;Denon: Created page with &amp;#039;So a hemispherical parachute with an air hole at the center seems like the best solution.  The air hole provides stability and a hemispherical paracute provides double the coeffi…&amp;#039;&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;So a hemispherical parachute with an air hole at the center seems like the best solution.  The air hole provides stability and a hemispherical paracute provides double the coefficient of drag when compared to a flat chute.&lt;br /&gt;
&lt;br /&gt;
did some quick maths and a 1 meter radius parachue provides a landing velocity of just under 4 m/s or 8mph (for you imperialists) assuming a payload of 5lbs ~ 2.3kg.&lt;br /&gt;
&lt;br /&gt;
sources:&lt;br /&gt;
&lt;br /&gt;
http://www.onlinetesting.net/cgi-bin/descent3.3.cgi&lt;br /&gt;
http://my.execpc.com/~culp/rockets/descent.html&lt;/div&gt;</summary>
		<author><name>Denon</name></author>
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