From: henry@spsystems.net   
      
   In article ,   
   Rodney Kelp  wrote:   
   >You don't have to keep it cold, you have to keep it pressurized.   
      
   Unfortunately, keeping hydrogen pressurized *enough* to retain roughly the   
   density of liquid hydrogen (already undesirably low) requires extremely   
   high pressures and thus very heavy tanks.  It's not competitive with   
   refrigeration for space applications.   
   --   
   "Think outside the box -- the box isn't our friend."    |   Henry Spencer   
                                   -- George Herbert       | henry@spsystems.net   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)