From: g_d_pusch_remove_underscores@xnet.com   
      
   Ian Stirling  writes:   
      
   > Joann Evans  wrote:   
   >> Ian Stirling wrote:   
   >>>   
   >>> Can practical rocketry be done on the venusian surface, or is it basically   
   >>> out of the question.   
   >    
   >>> Might things like ejector ramjets be very efficient?   
   >>   
   >>   Where's the oxygen to burn fuel? 'Air breathing' engines do make that   
   >> assumption, but it's not true on all worlds.   
   >   
   > I thought an ejector ramjet was basically a rocket engine with a shroud   
   > to enhance entraining air.   
      
   It basically is.   
      
      
   > Or is that something else.   
      
   Well, unless the rocket is burning "fuel rich" enough that its plume burns   
   in the incoming air, one normally calls it an "air-augmented rocket" rather   
   than an "ejector ramjet"...   
      
      
   -- Gordon D. Pusch   
      
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