XPost: misc.misc   
   From: henry@spsystems.net   
      
   In article <1107523613.683437.173170@o13g2000cwo.googlegroups.com>,   
   Cray74@gmail.com  wrote:   
   >By halving the diameter of the sphere to 50m, you   
   >quarter the mass of shell that needs to be launched   
   >at once. The mass of air drops 1/8th that of   
   >a 100m sphere, too.   
      
   Shell mass drops to 1/8 too, actually.  1/4 of the surface area, plus it   
   only needs to be half as thick to hold the same pressure.   
   --   
   "Think outside the box -- the box isn't our friend."    |   Henry Spencer   
                                   -- George Herbert       | henry@spsystems.net   
      
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