From: earlcp@idirect.com   
      
   "zoltan"  :   
      
   > The navaho and bomark ramjets had an Isp of 1800 at mach 3. The fastest   
   > flight achieved by navaho was around mach 6.   
      
   Have you got an URL pointing to such?  And by the way what was the thrust to   
   drag ratio?  If it is near 1::1 then you spend alot of time fighting drag   
   while trying to get up to speed.   
      
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