The applicability of a V-type empennage on an unpowered semiscale helicopter fuselage is considered as design criteria for improved directional control devices. Configuration changes included variations of V-tail dihedral angle, planform area, and incidence angle. Of the configurations tested, a V-tail with a dihedral angle of 55 deg, a total planform area of 0.244 sq cm, and an incidence angle of 5 deg most nearly match the trim and static stability of the baseline conventional empennage. Design optimization of empennage configuration for helicopter stability and control at cruise speed; the variables include dimensions, angle of attack, longitudinal characteristics, planform, fuselage, and lateral directional characteristics; 10 figures and no tables.


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    Titel :

    Wind Tunnel Investigation of an Unpowered Helicopter Fuselage Model with a V-Type Empennage


    Beteiligte:
    C. E. Freeman (Autor:in) / W. T. Yeager (Autor:in)

    Erscheinungsdatum :

    1977


    Format / Umfang :

    54 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch






    Empennage of a helicopter

    KREITMAIR-STECK WOLFGANG / HEBENSPERGER MICHAEL | Europäisches Patentamt | 2016

    Freier Zugriff