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   Message 1,806 of 3,113   
   Ian Stirling to Earl Colby Pottinger   
   Re: Powered re-entry   
   12 May 04 17:06:09   
   
   From: root@mauve.demon.co.uk   
      
   Earl Colby Pottinger  wrote:   
   > "Ash Wyllie"  :   
   >   
   >> Rodney Kelp opined   
   >>   
   >> >If you suddenly stopped after orbiting at 18,000mph you'd still drop like   
   > a   
   >> >rock and burn up.   
   >>   
   >> I wrote a free fall program a few years ago. From 200km and assuming that   
   >> the   
   >> coefficient of drag gives a terminal velocity of 100m/s, I get   
   >>   
   >> the fall from  200000 meters took  277  secs   
   >> max v =  -1701.19684 m/sec    at  41527.70 meters   
   >> max a =  84.6063665 m/sec**2 at  18907.21 meters.   
   >>   
   >> I suspect that the 84 g deceleration would present a problem assuming that   
   >> you survived re-entry at higher altitudes.   
   >   
   > 84.6 m/sec^2 equals about 8.6 Gs.  That is only for very healthy people but   
   > do-able.   
      
   Especially prone, and only lasting 15 seconds.   
   Kind of hard to do though, as stopping is the hard part.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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