A ducted fan for a helicopter includes a transverse duct and a counter-torque device supported within the duct. The counter-torque device includes a rotor rotatably mounted within the duct and a stator fixedly mounted within the duct downstream from the rotor. The rotor includes a rotor hub having a rotor axis, and rotor blades extending from the hub. The rotor blades have a modulated angular distribution about the rotor axis. The stator includes a stator hub, and a plurality of stator vanes distributed around the stator hub. The stator vanes are angularly modulated around the stator hub.

    Linvention concerne une soufflante carénée pour hélicoptère qui comprend un conduit transversal et un dispositif anticouple supporté par ledit conduit. Le dispositif anticouple comprend un rotor monté, de manière rotative, dans le conduit et un stator monté, de manière fixe, dans ledit conduit en aval du rotor. Ledit rotor comprend un moyeu de rotor doté dun axe de rotor, ainsi que des pales qui sétendent à partir du moyeu. Les pales de rotor présentent une répartition angulaire modulée autour de laxe de rotor. Le stator comprend un moyeu et une pluralité daubes de stator réparties autour du moyeu de stator. Lesdites aubes de stator sont modulées angulairement autour du moyeu de stator.


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    Title :

    COUNTER-TORQUE DEVICE FOR A HELICOPTER


    Additional title:

    DISPOSITIF ANTICOUPLE POUR HELICOPTERE


    Contributors:
    KEBRLE JOHN M (author) / ANDREWS JAMES R (author) / DAW JUSTIN (author) / HURDLE JIM (author) / SHERRILL PAUL (author) / NARRAMORE JIM C (author) / XUE SIDNEY (author) / HOLLIMON CHARLES (author) / SMITH DUDLEY (author) / DOCKER BRYCE (author)

    Publication date :

    2016-10-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / F01D Strömungsmaschinen [Kraft- und Arbeitsmaschinen oder Kraftmaschinen], z.B. Dampfturbinen , NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES



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