From: LFLekx@NOSPAM.rogers.com.retro.com   
      
   On 14 Jan 2005 10:52:24 +0100, Magnus Redin    
   wrote:   
      
   >Look up the early shuttle concepts. One very intresting idea was to   
   >optimise the separation speed between the first and second stage so   
   >that the first stage needed no other reentry "insulation" then perhaps   
   >a sligthly heavier metal skin to soak up the heat.   
      
      What kind of separation speed (if you know...) were they talking   
   about?  Subsonic, Mach 1-3, or Mach 4-6?  Subsonic would hardly be   
   worthwhile.   
      
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