tag:blogger.com,1999:blog-3673435362400368888.post1009141590424127693..comments2023-04-01T13:39:24.156-07:00Comments on RocketsAndSuch: Bait and SwitchRocket Manhttp://www.blogger.com/profile/05109496878476775729noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-3673435362400368888.post-27403015860570072192008-03-15T00:24:00.000-07:002008-03-15T00:24:00.000-07:00You know the payload issue with ares V is because ...You know the payload issue with ares V is because of ares I and them stripping Orion to make it light enough.<BR/><BR/>Orion can't perform LOI a 900m/sec burn that allows the CSM/LSAM stack to enter lunar orbit.<BR/>The LSAM presently has to perform this burn this makes it tanks about 30% larger then they normally would have to be for a given fuel.<BR/><BR/>This extra tank mass has to be able to be carried by the descent stage all the way to the lunar surface.<BR/>The need for total of over 3500M/sec delta V out of the descent stage forces use of a high ISP fuel in this case hydrogen.<BR/><BR/>"For historical references the Apollo LEM descent stage only needed a delta V of 2450M/sec."<BR/><BR/>Liquid hydrogen being a very low density and very cold fuel needs very large tanks, plus insulation and a margin of extra fuel to handle boil off for up to 4 weeks parking in LEO plus the 4 day trip out to the moon.Patchoulihttps://www.blogger.com/profile/18441070637263987098noreply@blogger.comtag:blogger.com,1999:blog-3673435362400368888.post-22365702906223908142008-02-29T09:41:00.000-08:002008-02-29T09:41:00.000-08:00The "fruit of their efforts" just gets more rotten...The "fruit of their efforts" just gets more rotten by the day.Dave Ghttps://www.blogger.com/profile/01387631747851735524noreply@blogger.comtag:blogger.com,1999:blog-3673435362400368888.post-73454689984161536372008-02-28T15:59:00.000-08:002008-02-28T15:59:00.000-08:00I've really enjoyed reading Rocketsandsuch. Love t...I've really enjoyed reading Rocketsandsuch. Love the writing style. <BR/> Sometimes smart people lack common sense. <BR/> Common sense has left the Empire.RayGunhttps://www.blogger.com/profile/02558983185935622861noreply@blogger.comtag:blogger.com,1999:blog-3673435362400368888.post-53199320973748977772008-02-28T12:37:00.000-08:002008-02-28T12:37:00.000-08:00Many other euphemisms are possible.'The bigger the...Many other euphemisms are possible.<BR/><BR/>'The bigger they come, the harder they fall' comes to mind.Anonymousnoreply@blogger.com