From: spam@merlyn.demon.co.uk   
      
   JRS:  In article <41dc1378$0$47263$ed2e19e4@ptn-nntp-reader04.plus.net>,   
   dated Wed, 5 Jan 2005 16:19:05, seen in news:sci.space.tech, Ian   
   Stirling  posted :   
   >   
   >In principle, you can have one (or several) cars that go up and down   
   >their portion of the elevator, transferring cargo between them and the   
   >next one - so that if you need one heavy elevator car to shield through the   
   >Van Allen/... belts, then you don't pay the penalty on all cars,   
   >just one.   
      
   Cargo transfer is tiresome.   
      
   Use unshielded cars, and shield them by "docking into" a mobile shield-   
   van to get through the Belts.   
      
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