From: henry@spsystems.net   
      
   In article ,   
   Michael K. Heney  wrote:   
   >Next, the "English"  Isp uses pounds mass, not pounds force.  So the   
   >equivalent metric version would be Kg/(Kg/sec) rather than Newtons;   
   >resulting in "seconds" as the unit.   
      
   Proper metric practice never, ever uses the kilogram as a unit of force --   
   it is always mass.  Just because some versions of the Imperial units are   
   stupid about this is no reason to repeat the mistake.   
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   MOST launched 30 June; science observations running     |   Henry Spencer   
   since Oct; first surprises seen; papers pending.        | henry@spsystems.net   
      
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