Embodiments are directed to adding wing extensions (112; 301; 401) outboard of the engine nacelles (106; 305; 404) on tiltrotor aircraft (101; 402) to increase cruise efficiency. By using pivoting wing extensions (112; 301; 401), the download penalty during hover operations is decreased because the wing extensions (112; 301; 401) will pivot into the downwash rather than act as a barrier. Freely pivoting wing extensions (112; 301; 401) will align with the local airflow during conversion mode flight, which eliminates flow separation issues. The freely pivoting wing extensions (112; 301; 401) also reduce gust response by rotating out of the way of turbulence and updrafts. A trailing edge trim flap (115; 409) provides simple and effective control of the incidence angle for the free-pivot wing extension (112; 301; 401).


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    Title :

    TILTROTOR FREE-PIVOT WING EXTENSION


    Additional title:

    FREISCHWENKENDE FLÜGELVERLÄNGERUNG EINES KIPPROTORS
    EXTENSION D'AILE À PIVOTEMENT LIBRE D'AÉRONEF À ROTORS BASCULANTS


    Contributors:

    Publication date :

    2020-03-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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