From: jeff.findley@ugs.nojunk.com   
      
   "Monte Davis"  wrote in message   
   news:p3vu31d92ogff0g5pofnsro2h1tma42jbi@4ax.com...   
   > Dumb question: If one were in circular LEO and crazy enough to want a   
   > 90-degree change of inclination, what's the cost in delta-v? Is it, as   
   > intuition is telling me, equivalent to throwing away all your ~9 kps   
   > and re-acquiring it all?   
      
   It is, but you can play some games here.  What you can do is enter a very   
   highly elliptic orbit, so that you can do your plane change when furthest   
   away from the earth where your velocity is very small.  Once this is done,   
   you do another burn to re-enter your circular LEO orbit.  If you do the math   
   you'll find that this is far cheaper than doing the 90 degree plane change   
   in LEO.   
      
   Jeff   
   --   
   Remove icky phrase from email address to get a valid address.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)