#horizontal_tail  the horizontal stabilizer and elevator in the tail assembly of an aircraft
  supertype:  #stabilizer.airfoil  airfoil consisting of a device for stabilizing an aircraft
  part of:  #tail_assembly
  part:  #elevator  the airfoil on the tailplane of an aircraft that makes it ascend or descend
  part:  #horizontal_stabilizer__tailplane  the horizontal airfoil of an aircraft's tail assembly that is fixed and to which the elevator is hinged

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