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    Helicopter Tail Rotor
    0:30

    Helicopter Tail Rotor

     2  views
    helicopter rotor and swashplate
    0:48

    helicopter rotor and swashplate

     2  views
    Intermeshing helicopter rotors
    1:08

    Intermeshing helicopter rotors

     2  views
    Helicopter Flight Controls
    0:50

    Helicopter Flight Controls

     4  views