From: root@mauve.demon.co.uk   
      
   Robert Lee  wrote:   
   > I was wondering if you worked out how high the price of oil has to be in   
   > order for an SPS project to be profitable.   
      
   This is going to be as contraversial as the Drake equation.   
   There are so many possible variables.   
   What do you pick for launch cost?   
   Is it $6000/Kg, or $30/Kg launched by some sort of tether.   
   Are you using near-term 200W/Kg solar panels, or are you assuming   
   thin-film manufacturing breakthroughs, solar-dynamic, or...   
      
   What is the size of the recieving arrays, how close are they   
   together, how big are they, can you use the land under them, do you   
   need to keep aeroplanes out, ......   
      
   All of these are variables.   
   It's quite easy to generate numbers that vary by a factor of at least   
   a thousand.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)