XPost: sci.space.policy, sci.physics   
   From: gossg@gossg.org   
      
   mvp@web1.calweb.com (Mike Van Pelt) wrote:   
      
   >In article , Sergio   wrote:   
   >>how about a Space Slingshot ?   
   >   
   >Do you mean a rotating skyhook?   
   >   
   >Some of those ideas are ... intriguing.  And have much less   
   >stringent requirements on materials.   
      
   A rotating skyhook needs to restore energy after passing a ship   
   upwards.  Either it needs at least as much returning mass as   
   departing, or needs (maybe electric ion) booster to retain station.   
   --   
   We are geeks.  Resistance is voltage over current.   
      
   --- SoupGate-Win32 v1.05   
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