From: klaehn@gamemakers.de   
      
   Jonathan A. Goff wrote:   
      
   [snip]   
   > I know for room temperature propellants that propellant transfer has been   
   > demoed before, and that just using an expulsion bladder can often do the   
   > trick, but AIUI, it's hard to get anything elastomeric at LOX   
   > temperatures.   
   >   
   There are teflon bags available that are used for the storage of blood and   
   other biological samples in liquid nitrogen. According to the manufacturer   
   they are elastic even at the boiling point of liquid nitrogen. They are of   
   course totally brittle at liquid hydrogen temperatures.   
      
   See for example   
      
      
   Yet another case where mild cryogenics like LOX and LN2 are much less   
   problematic than liquid hydrogen or liquid helium.   
      
   HTH   
      
   Rüdiger Klaehn   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)