XPost: rec.arts.sf.written, rec.arts.sf.science, sci.space.policy   
   From: fjmccall@gmail.com   
      
   "Robert Clark"  wrote on Mon, 28 May   
   2018 07:19:51 -0400:   
      
   >   
   >With altitude compensation, allowing even first stage nozzles to achieve the   
   >highest possible vacuum Isp, and using also  lightweight structures such as   
   >composite tanks, the payload fraction of an SSTO can be comparable to that   
   >of multi-stage rockets, ca. 3%.   
   >   
      
   Sorry, but that doesn't follow.  If you can build an SSTO using those   
   technologies you can also build a multi-stage rocket using the same   
   technologies.  The multi-stage rocket will always do better.   
      
      
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