<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-09-19T04:29:53Z</responseDate><request verb="GetRecord" identifier="oai:dspace.mit.edu:1721.1/37949" metadataPrefix="dim">https://dspace.mit.edu/server/oai/request</request><GetRecord><record><header><identifier>oai:dspace.mit.edu:1721.1/37949</identifier><datestamp>2022-01-13T07:54:11Z</datestamp><setSpec>com_1721.1_7582</setSpec><setSpec>com_1721.1_7581</setSpec><setSpec>col_1721.1_131023</setSpec></header><metadata><dim:dim xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.dspace.org/xmlns/dspace/dim http://www.dspace.org/schema/dim.xsd">
   <dim:field mdschema="dc" element="contributor" qualifier="advisor" lang="en_US">David Miller.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="author" lang="en_US">York, Stephen P. (Stephen Patrick)</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="other" lang="en_US">Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.</dim:field>
   <dim:field mdschema="dc" element="contributor" qualifier="department">Massachusetts Institute of Technology. Department of Aeronautics and Astronautics</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="accessioned">2007-07-18T13:14:12Z</dim:field>
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   <dim:field mdschema="dc" element="date" qualifier="copyright" lang="en_US">2006</dim:field>
   <dim:field mdschema="dc" element="date" qualifier="issued" lang="en_US">2006</dim:field>
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   <dim:field mdschema="dc" element="identifier" qualifier="oclc" lang="en_US">144587514</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2006.</dim:field>
   <dim:field mdschema="dc" element="description" lang="en_US">Includes bibliographical references (p. 93-94).</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="abstract" lang="en_US">Previous missions to Mars have landed masses of approximately I metric ton on the surface. Vehicles large enough to support humans on the flight to Mars and land them safely on the surface are closer to 100 metric tons, a two order of magnitude increase. This large mass causes many changes in the EDL of a manned vehicle compared to proven unmanned landers. One critical change is the potential choice of a propulsive descent to replace parachute systems that do not scale to large masses. The placement of these engines on a lander is subject to many concerns such as heat shield packing, cargo handling, and engine out mitigation. Engine out mitigation is of considerable interest because configurations that improve failure mitigation tend to be poorer for the other considerations. This thesis presents the development of a simulation of the descent phase of a manned landing at Mars, an overview of the effects of the various requirements on manned lander engine configuration and the results of a 6 DOF analysis of engine failure scenarios.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="statementofresponsibility" lang="en_US">by Stephen P. York.</dim:field>
   <dim:field mdschema="dc" element="description" qualifier="degree" lang="en_US">S.M.</dim:field>
   <dim:field mdschema="dc" element="format" qualifier="extent" lang="en_US">133 p.</dim:field>
   <dim:field mdschema="dc" element="language" qualifier="iso" lang="en_US">eng</dim:field>
   <dim:field mdschema="dc" element="publisher" lang="en_US">Massachusetts Institute of Technology</dim:field>
   <dim:field mdschema="dc" element="rights" lang="en_US">M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.</dim:field>
   <dim:field mdschema="dc" element="rights" qualifier="uri">http://dspace.mit.edu/handle/1721.1/7582</dim:field>
   <dim:field mdschema="dc" element="subject" lang="en_US">Aeronautics and Astronautics.</dim:field>
   <dim:field mdschema="dc" element="title" lang="en_US">Engine placement for manned descent at Mars considering single engine failures</dim:field>
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   	&lt;Title>Engine placement for manned descent at Mars considering single engine failures&lt;/Title>
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   	&lt;PublicationDate>2006&lt;/PublicationDate>
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        	&lt;DisplayName>York, Stephen P. (Stephen Patrick)&lt;/DisplayName>
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    &lt;Keyword>Aeronautics and Astronautics.&lt;/Keyword&gt;
   	&lt;Abstract>Previous missions to Mars have landed masses of approximately I metric ton on the surface. Vehicles large enough to support humans on the flight to Mars and land them safely on the surface are closer to 100 metric tons, a two order of magnitude increase. This large mass causes many changes in the EDL of a manned vehicle compared to proven unmanned landers. One critical change is the potential choice of a propulsive descent to replace parachute systems that do not scale to large masses. The placement of these engines on a lander is subject to many concerns such as heat shield packing, cargo handling, and engine out mitigation. Engine out mitigation is of considerable interest because configurations that improve failure mitigation tend to be poorer for the other considerations. This thesis presents the development of a simulation of the descent phase of a manned landing at Mars, an overview of the effects of the various requirements on manned lander engine configuration and the results of a 6 DOF analysis of engine failure scenarios.&lt;/Abstract>
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