Orion Service Module Capabilities

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kyle_baron

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After the 2nd stage is ejected, the service module is used to boost the Orion capsule from 83 mi. to 185 mi. above the Earth.&nbsp; Will it have enough propellent to make a return trajectory from the moon's orbit, also?&nbsp; It's a pretty dinky (small) little booster, IMO. <div class="Discussion_UserSignature"> <p><font size="4"><strong></strong></font></p> </div>
 
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Cygnus_2112

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>After the 2nd stage is ejected, the service module is used to boost the Orion capsule from 83 mi. to 185 mi. above the Earth.&nbsp; Will it have enough propellent to make a return trajectory from the moon's orbit, also?&nbsp; It's a pretty dinky (small) little booster, IMO. <br /> Posted by kyle_baron</DIV></p><p>&nbsp;By design it will have enough </p>
 
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kyle_baron

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;By design it will have enough <br />Posted by Cygnus_2112</DIV></p><p>&nbsp;</p><p>The 185 mi. orbit is for the ISS.&nbsp; Would the lunar trajectory orbit be less or more?&nbsp; Anyone know what the minimum orbit is, for a 2 week period around the Earth?<br /></p> <div class="Discussion_UserSignature"> <p><font size="4"><strong></strong></font></p> </div>
 
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Cygnus_2112

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;The 185 mi. orbit is for the ISS.&nbsp; Would the lunar trajectory orbit be less or more?&nbsp; Anyone know what the minimum orbit is, for a 2 week period around the Earth? <br /> Posted by kyle_baron</DIV></p><p>"After the 2nd stage is ejected, the service module is used to boost the Orion capsule from 83 mi. to 185 mi. above the Earth. "</p><p>&nbsp;The&nbsp; service module will have to do the same same thing for a lunar mission.&nbsp; The parking orbit of the LSAM and EDS will be a little lower, around 125 mi.&nbsp; The service module tanks are sized based on the burn needed to return from the moon.&nbsp; The service module capabilities for an ISS are over kill and some propellant may be offloaded (not loaded) for trips to the ISS.</p><p>&nbsp;</p><p>minimum orbit is, for a 2 week period around the Earth is about 1/2 distance to the moon </p>
 
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kyle_baron

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'> The parking orbit of the LSAM and EDS will be a little lower, around 125 mi.&nbsp; The service module tanks are sized based on the burn needed to return from the moon.&nbsp; The service module capabilities for an ISS are over kill and some propellant may be offloaded (not loaded) for trips to the ISS.</DIV></p><p>&nbsp;</p><p>Excellent, Thank you.</p><p>&nbsp;</p><p>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;minimum orbit is, for a 2 week period around the Earth is about 1/2 distance to the moon <br />Posted by Cygnus_2112</DIV></p><p>&nbsp;</p><p>That seems awfully far away, especially if Ares V launches 1st, and Ares-1 is delayed, for any number of reasons.&nbsp; It would seem to me, that Ares-1 would never reach that distance in the SM.<br /></p> <div class="Discussion_UserSignature"> <p><font size="4"><strong></strong></font></p> </div>
 
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Cygnus_2112

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<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;Excellent, Thank you.&nbsp;&nbsp;That seems awfully far away, especially if Ares V launches 1st, and Ares-1 is delayed, for any number of reasons.&nbsp; It would seem to me, that Ares-1 would never reach that distance in the SM. <br /> Posted by kyle_baron</DIV></p><p>&nbsp;</p><p>I misunderstood your question.&nbsp; I thought you were asking how high is an orbit with a 2 week period.&nbsp; The parking orbit of the EDS/LSAM will be a trade of Ares 1 and Ares 5 capabilities and will be similar to the&nbsp; shuttle's&nbsp;</p>
 
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