XPost: sci.electronics.design, sci.astro   
   From: john@sugarbit.com   
      
   Bill Sloman wrote:   
   > Earth has a magnetic field, and nobody uses magnets to drag boats or   
   > aircraft around.   
      
   Earth has a very weak magnetic field.  Consequently even near the poles   
   the force will be too small to be of any practical use.   
      
   The torque on a dipole is sometimes used for satellite attitude control.   
   --   
   John Hasler   
   john@sugarbit.com   
   Dancing Horse Hill   
   Elmwood, WI USA   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)