From: earlcp@idirect.com   
      
   gewi001@phy.auckland.ac.nz (Greg) :   
      
   > "Horatio."  wrote in message   
   > news:...   
   >   
   > >There would be a payoff in reliability due to the simplicity of the   
   > system.   
   >   
   > I've never considered solids that simple. Sure thay look simple, but   
   > try making one, then try making a big one.   
   >   
   > To first order approximation a solid is a pressure feed liquid with a   
   > oversized combustion chamber(and all that it implies) and under   
   > performing fuel combinations. And i left out the part were its kinda a   
   > big stick of dynamite. Hybrids are better, but SSTO will be a liquid   
   > fueled rocket.   
   >   
   > Solids are best left for the military applications thay were orginaly   
   > devloped for.   
   >   
   > IMHO of course.   
      
   Would like to point out that H2O2(liquid) and AlH3(solid) has a ISP over   
   550s.  This suggest a hybrid can be a SSTO.   
      
                    Earl Colby Pottinger   
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