From: andrewbetter@gmail.com   
      
   I was working over this again to compare the equations and figured that it was   
   probably a calculus error.  Then I tried plotting this, and as you suggested,   
   I was using a constant acceleration change approximation, whereas the actual   
   change is in fact    
   logarithmic.  Although I've forgotten too much calculus to determine my exact   
   error for the time being, I at least understand why there's a problem.  Thanks   
   for your help--I think I'll stick to the Rocket Equation and try to keep   
   things simple as much as    
   possible.   
      
   --- SoupGate-Win32 v1.05   
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