& btengrate()
 
  Syntax: btengrate(<UnitDB>)
 
  This function returns a space delimited string detailing the 
  enginesize and susp_factor for <UnitDB>.
 
  Error Messages:
 
  * If the object specified in <UnitDB> is not an RS unit the 
   function returns #-1 NOT A MECH 
 
  Example:
  Given that #dbref 1234 is a valid RS unit (an EXT-4D)
 
  > think btengrate(#1234)
  390 0
 
  See Also: btengrate_ref 