From: mikkelhaaheim@gmail.com   
      
   Okay. Your link answers my concern for the Isp and thrust issue, but I still   
   have some concerns for the feed issue. The equation in the link assumes a   
   chamber pressure at combustion, but this chamber pressure assumes that you are   
   receiving the full rated    
   propellant feed rate. The second part of my question was whether or not the   
   effect of full atmospheric pressure in the engine itself on the pressure feed   
   rate has been considered.   
   It is entirely possible (and perhaps probable) that the high pressure of the   
   propellant would render the atmospheric pressure insignificant, but I would   
   just like to know if you ran through the numbers for the internal fluid   
   dynamics.   
      
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