From: alain245@videotron.ca   
      
   On Sep/10/2022 at 12:21, JF Mezei wrote :   
   > Not sure if there is anoyone left in the group, but just in case.   
   >   
   > Consideirng SLS has been in development for over 10 years, considering   
   > they already had quick disconnect experience for H2 refueling on   
   > Shuttle, I am curous on what constraints would have prevented them from   
   > developping a reliable H2 fill line quick disconnect for SLS ?   
   >   
   > I take it that they can't test it at VAB because they don't have LH2   
   > lines there.  (and leaking H2 indoors, not a great idea).   
   >   
   > But when this quick disconnect was designed, wouldn't it have had some   
   > real testing with LH2 to ensure it works well and that any limitations   
   > and maintenance requiremenmts (eg: change rubber seals every X refills)   
   > would be well known.   
   >   
   >   
   > And considering the number of tests they did of this rocket, how come   
   > this quick disconnect problem didn't get noticed before ?   
      
   It's normal on a new system to have some bugs.   
      
   The real question, in my opinion, is why didn't they disconnect the   
   whole programme years ago. Why not buy rides from SpaceX and Blue Origin   
   to go to the moon. It would be much cheaper than the SLS boondoggle.   
      
      
   Alain Fournier   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)