From: henry@spsystems.net   
      
   In article <2005010101100616807%mjwise@kapunet>,   
   Michael J Wise   wrote:   
   >> Why not any first stage with LH2/LOX before Delta IV?   
   >   
   >What about the shuttle?   
   >The SSME's burn LH2/LOX.   
      
   The stage numbering for parallel-burn systems is a bit confused, but by   
   the most realistic convention, the SSMEs are the shuttle's second stage,   
   the SRBs being the first.   
   --   
   "Think outside the box -- the box isn't our friend."    |   Henry Spencer   
                                   -- George Herbert       | henry@spsystems.net   
      
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