XPost: sci.space.policy, sci.physics   
   From: fjmccall@gmail.com   
      
   Serigo  wrote:   
      
   >On 10/14/2016 1:30 PM, Fred J. McCall wrote:   
   >> Serigo  wrote:   
   >>>   
   >>> but ISS does not provide its own food, nor clean clothes, nor   
   >>> replacement water and N2 and only supports 3 people, 6 for short times   
   >>>   
   >>   
   >> Uh, no.  Normal crew on ISS is 6-7 people.  You think we're shipping   
   >> up huge loads of WATER to ISS?  That's really quite funny. In reality,   
   >> ISS gets about 2,000 litres a year of 'replacement water'.  Most of   
   >> the water on ISS already comes from recycling.  Note that water is   
   >> used to generate O2 on ISS. 'Replacement' N2 is a vanishingly small   
   >> amount.   
   >>   
   >> Mars has lots of in situ water and nitrogen.  On Mars you'd just wash   
   >> clothes.   
   >>   
   >   
   >Nasa says 0.43 gallons per day per person + 0.21 gallons for food per   
   >person, another NASA site says ISS uses 3 gallons per day per person   
   >   
      
   You need to read further.  They get most of it back and reuse it. I've   
   told you how much water is shipped up to them.  Some water is used to   
   make oxygen.   
      
   >   
   >ISS has a N2 tank on the side of it.   
   >   
      
   Of course it does.  They're for COOLING and are very occasionally   
   replaced when they get empty.  Actual nitrogen storage for use inside   
   the station is kept in a couple of small tanks in the airlock.   
      
   Here.  Educate yourself.   
      
   http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20150010425.pdf   
      
      
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   "Ignorance is preferable to error, and he is less remote from the   
    truth who believes nothing than he who believes what is wrong."   
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