#flaps__flap__flap  a movable airfoil that is part of an aircraft wing; used to increase lift or drag
  supertype:  #airfoil__control_surface__surface  a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight
  subtype:  #landing_flap  a flap on the underside of the wing that is lowered to slow the plane for landing
  part of:  #wing.airfoil  one of the horizontal airfoils on either side of the fuselage of an airplane
     part of:  #airplane__aeroplane__plane  an aircraft that has a fixed wing and is powered by propellers or jets; "the flight was delayed due to trouble with the airplane"

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