XPost: sci.astro, sci.physics, sci.space.policy   
   From: tkoenig@netcologne.de   
      
   Doc O'Leary  schrieb:   
      
   > I’m not counting them out, but when the topic is cost/efficiency, the   
   > basic question is still how much energy is being expended to get each   
   > kg into orbit.   
      
   At the moment, not at all.  Ballpark calculation:   
      
   An older version of a Falcon 9 reportedly had 488 tons of total   
   fuel, 147 of it RP-1 (a modified kerosene).  Liquid oxygen is   
   quite cheap, and if we give RP-1 a cost of 1 dollar per kg,   
   we probably are in the right ballpark.  So, around 150 000 Dollar   
   per launch.   
      
   This is _very_ low compared to all the other costs.  A launch   
   cost around 50 to 60 million dollars now, if I remember the   
   figures right.   
      
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