#rotor  rotating mechanism consisting of an assembly of rotating airfoils; horizontal rotors on a helicopter or compressor rotors of a jet engine
  supertype:  rotating_mechanism  a mechanism that rotates
  subtype:  main_rotor  tail_rotor
  part:  impeller
  part of:  helicopter__chopper__whirlybird__eggbeater  an aircraft without wings that obtains its lift from the rotation of overhead blades
  part of:  jet_engine__jetengine  a gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsion
     part of:  jet-propelled_plane__jetpropelledplane__jet__jetplane  an airplane powered by one or more jet engines

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