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	<title>MarsBlog.net &#187; pa-1</title>
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		<title>Pad Abort Test Launch Video Compilation</title>
		<link>http://marsblog.net/wp/2010/05/pad-abort-test-launch-video-compilation/</link>
		<comments>http://marsblog.net/wp/2010/05/pad-abort-test-launch-video-compilation/#comments</comments>
		<pubDate>Wed, 12 May 2010 05:16:18 +0000</pubDate>
		<dc:creator>T.L. James</dc:creator>
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		<guid isPermaLink="false">http://marsblog.net/wp/?p=1963</guid>
		<description><![CDATA[Still no public pics of the LAS &#8220;lawn dart&#8221;, but there&#8217;s lots of fun eye candy in this video, especially the beautiful slow-motion footage at the beginning of the motor ignition: A few interesting things to note: The impressively crisp black and white footage of the reorientation and jettison The docking-hatch-view of the forward bay [...]]]></description>
			<content:encoded><![CDATA[<p>Still no public pics of the LAS &#8220;lawn dart&#8221;, but there&#8217;s lots of fun eye candy in this video, especially the beautiful slow-motion footage at the beginning of the motor ignition:</p>
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<p>A few <a title="interesting" href="http://marsblog.net/wp/2009/09/interesting-2/">interesting</a> things to note:</p>
<ul>
<li>The impressively crisp black and white footage of the reorientation and jettison</li>
<li>The docking-hatch-view of the forward bay cover jettison and chute deployment</li>
<li>The amusing (but very brief) cameo appearance of the jettisoned LAS in the background of one of the chute deployment cuts, weathervaning into a point-down attitude</li>
<li>The firing of the attitude control motor, which appears as eight skinny flames near the tip of the LAS stack</li>
<li>The fact that there is NO visible plume damage on the capsule or the LAS adapter cone (especially surprising given the incinerated appearance of the cone after impact with the desert floor)</li>
</ul><p><a class="a2a_dd a2a_target addtoany_share_save" href="http://www.addtoany.com/share_save#url=http%3A%2F%2Fmarsblog.net%2Fwp%2F2010%2F05%2Fpad-abort-test-launch-video-compilation%2F&amp;title=Pad%20Abort%20Test%20Launch%20Video%20Compilation" id="wpa2a_2"><img src="http://marsblog.net/wp/wp-content/plugins/add-to-any/share_save_171_16.png" width="171" height="16" alt="Share"/></a></p>]]></content:encoded>
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		<title>PA-1 Test &#8211; A Little TOO Successful?</title>
		<link>http://marsblog.net/wp/2010/05/pa-1-test-a-little-too-successful/</link>
		<comments>http://marsblog.net/wp/2010/05/pa-1-test-a-little-too-successful/#comments</comments>
		<pubDate>Sat, 08 May 2010 06:10:58 +0000</pubDate>
		<dc:creator>T.L. James</dc:creator>
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		<guid isPermaLink="false">http://marsblog.net/wp/?p=1960</guid>
		<description><![CDATA[A little bit behind schedule (it was supposed to launch before the 2008 Presidential election), the Pad Abort 1 test launched at White Sands yesterday &#8212; and would have subjected any astronauts inside to 16 gees. Oops. The one-minute, 35-second test at White Sands Missile Range, N.M., took the capsule higher — 3,886 feet — [...]]]></description>
			<content:encoded><![CDATA[<p>A little bit behind schedule (it was supposed to launch before the 2008 Presidential election), the <a target="_blank" href="http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=space&amp;id=news/asd/2010/05/07/05.xml&amp;headline=First%20Orion%20Pad%20Abort%20Test%20Is%20Nominal">Pad Abort 1 test launched at White Sands yesterday</a> &#8212; and would have subjected any astronauts inside to 16 gees. <em><a title="Oops" href="http://marsblog.net/wp/2004/03/oops/">Oops</a></em>.</p>
<blockquote><p>The one-minute, 35-second test at White Sands Missile Range, N.M.,  took the capsule higher — 3,886 feet — and farther down range — 6,919  feet — than anticipated.</p>
<p>“That motor was quite a performer,” said Deputy Test  Director Jay Estes. “You might not want to be riding in there.”</p></blockquote>
<p>That&#8217;s the truth in more ways than he intended, I&#8217;m sure. (And I can&#8217;t be the only one who finds it amusing that one of the guys launching a big solid rocket is named &#8220;Estes&#8221;.)</p>
<p>Were the program to be continued, this excess capability might actually be a <em>good </em>thing to have, given how much the capsule has changed since the PA-1 design was frozen (more to the point: how much more it weighs now).</p>
<p>Landing was gentler than expected, but a heavier capsule would work against that:</p>
<blockquote><p>The boilerplate capsule floated down to the desert floor under the  three red-and-white main chutes, slowed enough by them that the  telemetry system continued to operate after impact. Estes said test  engineers received all of the data they expected to receive.</p>
<p>“It was a beautiful flight,” he said. “That went like  clockwork from what I could see.”</p>
<p>Don Reed, the NASA test director, said the capsule  touched down at about 24 feet per second (fps), less than the 33 fps  impact velocity predicted at the outset. That sort of data will be  helpful as NASA refines its predictive models for future developments.</p></blockquote>
<p>The best part of the test, though, was that the discarded motor stack turned into an <em>enormous </em>lawn dart. I don&#8217;t have permission to share the pics that were floating around the office today, but the shots of the burning adapter cone sticking up out of the desert floor are awesome &#8212; since the entire 40-odd-foot-tall tower above it is buried nearly vertically into the ground, along with about 40% of the cone itself, with just a small bulge of dirt humped up around it. It&#8217;s such a perfect needle-jab that it&#8217;s ridiculous. As for the rest of the hardware, the early reports suggested that, given another LAS, the boilerplate capsule and even the separately-jettisoned forward bay (parachute) cover could have been launched again in short order.</p><p><a class="a2a_dd a2a_target addtoany_share_save" href="http://www.addtoany.com/share_save#url=http%3A%2F%2Fmarsblog.net%2Fwp%2F2010%2F05%2Fpa-1-test-a-little-too-successful%2F&amp;title=PA-1%20Test%20%26%238211%3B%20A%20Little%20TOO%20Successful%3F" id="wpa2a_4"><img src="http://marsblog.net/wp/wp-content/plugins/add-to-any/share_save_171_16.png" width="171" height="16" alt="Share"/></a></p>]]></content:encoded>
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		<title>For Whatever It&#8217;s Worth&#8230;</title>
		<link>http://marsblog.net/wp/2010/05/for-whatever-its-worth/</link>
		<comments>http://marsblog.net/wp/2010/05/for-whatever-its-worth/#comments</comments>
		<pubDate>Tue, 04 May 2010 01:32:47 +0000</pubDate>
		<dc:creator>T.L. James</dc:creator>
				<category><![CDATA[Constellation]]></category>
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		<guid isPermaLink="false">http://marsblog.net/wp/?p=1953</guid>
		<description><![CDATA[&#8230;PA-1 is scheduled to launch at 9am EDT  Thursday May 6. NASA&#8217;s Pad Abort 1 will be the first fully integrated flight test of the launch abort system being developed for the Orion crew vehicle. The test is part of an ongoing mission to develop safer vehicles for human spaceflight applications. Hmm&#8230;then again, maybe it [...]]]></description>
			<content:encoded><![CDATA[<p>&#8230;<a target="_blank" href="http://ims.ivv.nasa.gov/mission_pages/constellation/orion/pa1-countdown-profile.html">PA-1 is scheduled to launch at 9am EDT </a> Thursday May 6.</p>
<p><!--Promo date and doctitle ends--><a target="_blank" title="Orion launch abort vehicle" href="http://ims.ivv.nasa.gov/images/content/445186main_jsc-pa1-533t.jpg"><img title="Orion launch abort vehicle" src="http://ims.ivv.nasa.gov/images/content/445185main1_jsc-pa1-226t.jpg" border="0" alt="Orion launch abort  vehicle" width="226" height="339" align="bottom" /></a></p>
<blockquote><p>NASA&#8217;s Pad Abort 1 will be the first fully integrated flight test of the launch abort system being developed for the <a title="Orion" href="http://marsblog.net/wp/2006/08/orion/">Orion</a> crew vehicle. The test is part of an ongoing mission to develop safer vehicles for human spaceflight applications.</p></blockquote>
<p>Hmm&#8230;then again, maybe it won&#8217;t be.</p><p><a class="a2a_dd a2a_target addtoany_share_save" href="http://www.addtoany.com/share_save#url=http%3A%2F%2Fmarsblog.net%2Fwp%2F2010%2F05%2Ffor-whatever-its-worth%2F&amp;title=For%20Whatever%20It%26%238217%3Bs%20Worth%26%238230%3B" id="wpa2a_6"><img src="http://marsblog.net/wp/wp-content/plugins/add-to-any/share_save_171_16.png" width="171" height="16" alt="Share"/></a></p>]]></content:encoded>
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