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Old 12-04-2011, 12:00 PM
  #5  
Rodney
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Default RE: servo arm length vs torque rating

You are mixing up the definition of torque and force; the torgue doesn't change with the length of the arm. However the force exerted by the arm does. The torque divided by the length of the arm determines the force exerted at the end of the arm assuming no friction in any of the pivot points.