#helicopter__chopper__whirlybird__eggbeater  an aircraft without wings that obtains its lift from the rotation of overhead blades
  supertype:  #heavier-than-air_craft  a non-buoyant aircraft that requires a source of power to hold it aloft and to propel it
  subtype:  #cargo_helicopter  #shuttle_helicopter  #single-rotor_helicopter  #skyhook.helicopter
  part:  #blade.rotating_mechanism__vane  flat surface that rotates and pushes against air or water
  part:  #landing_skids__landingskid  the landing gear of a helicopter
  part:  #rotor  rotating mechanism consisting of an assembly of rotating airfoils; horizontal rotors on a helicopter or compressor rotors of a jet engine
     part:  #impeller  the blade of a rotor (as in the compressor of a jet engine)

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