XPost: sci.space.policy, sci.physics, sci.astro   
   From: rgregoryclark@gmSPAMBLOCKail.com   
      
   Using the rocket equation you can show the payload of the BFS as an SSTO   
   using altitude compensating nozzles can be improved from ca. 1 ton to ca. 20   
   tons(!)   
      
   The task of getting passengers to orbit for the Mars flight, or for the   
   point-to-point transport role can be accomplished without the large,   
   expensive first stage booster.   
      
   Methods of accomplishing the altitude compensation by just attachments to   
   the Raptors are discussed, from nozzle extensions to variations on the   
   aerospike:   
      
   Tuesday, January 15, 2019   
   SpaceX BFS can be SSTO with altitude compensation.   
   https://exoscientist.blogspot.com/2019/01/spacex-bfs-can-be-ssto   
   with-altitude.html   
      
   Bob Clark   
      
   ------------------------------------------------------------------   
   Single-stage-to-orbit was already shown possible 50 years ago   
   with the Titan II first stage.   
   In fact, contrary to popular belief SSTO's are actually easy.   
   Just use the most efficient engines and stages at the same time,   
   and the result will automatically be SSTO.   
   Blog: Http://Exoscientist.blogspot.com   
   ------------------------------------------------------------------   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)