The present invention relates to an airfoil comprising a leading edge flap (210) providing a rigid leading edge surface profile contour (212); a central lifting section (220) aft of the rigid leading edge flap (210); a bottom side (208) comprising a lower surface contour section (232) formed at least by a lower surface section (228) of the rigid leading edge surface profile contour (212) and by a bottom surface (224) of the central lifting section (220); and a top side (206) comprising an upper surface contour section (234) formed at least by an upper surface section (230) of the rigid leading edge surface profile contour (212) and by a top surface (222) of the central lifting section (220). The rigid leading edge surface profile contour (212) is adapted to the central lifting section (220) such that at a first leading edge flap angle, the lower surface contour section (232) exhibits C1- and/or C2-continuity; and at a second leading edge flap angle, the upper surface contour section (234) exhibits C1- and/or C2-continuity. The present invention also relates to a lifting structure (W), such as a wing, comprising such an airfoil (200), and to a sailplane comprising such an airfoil (200).


    Access

    Download


    Export, share and cite



    Title :

    DOUBLE FLAP LAMINAR AIRFOIL


    Additional title:

    LAMINARE DOPPELKLAPPENFLÜGELSCHAUFEL
    PROFIL AÉRODYNAMIQUE LAMINAIRE À DOUBLE VOLET


    Contributors:

    Publication date :

    2024-10-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



    DOUBLE FLAP LAMINAR AIRFOIL

    ACHLEITNER JOHANNES | European Patent Office | 2023

    Free access

    Laminar-flow airfoil

    Somers, Dan M. | NTRS | 2005


    Airfoil and Flap Design

    Kanistras, Konstantinos / Valavanis, Kimon P. / Rutherford, Matthew J. | Springer Verlag | 2017


    Wind-tunnel investigation of NACA 23012 airfoil with 0.30-airfoil-chord double slotted flap

    Purser, P.E. / Fischel, J. / Riebe, J.M. | Engineering Index Backfile | 1943


    Airfoil fitted with slotted flap

    Higgins, G.J. | Engineering Index Backfile | 1936