High-altitude balloon sensor platforms could benefit greatly from lift augmentation, for example, to control altitude and ascent/descent rate, that does not depend on expendable lifting gas or ballast. Electric lift augmentation using solar power and a novel gossamer propeller concept is studied here, where extremely lightweight membrane propeller blades derive their stiffness from centripetal forces rather than rigid members. Although bearing a close resemblance to heliogyro solar sails, the application of gossamer propellers in an atmosphere differs significantly due to destabilizing aerodynamic moments. A method for producing static stability of propeller blade pitch using a particular rigging geometry for the leading- and trailing-edge membrane tensile members is introduced and analyzed, and lift and drag measurements are made using optical measurement techniques on a scaled prototype.


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    Titel :

    Stability of Gossamer Propellers for High-Altitude Ballooning


    Beteiligte:
    Kenny, Nicholas (Autor:in) / Lawrence, Dale (Autor:in)

    Erschienen in:

    Journal of Aircraft ; 62 , 2 ; 370-380


    Erscheinungsdatum :

    01.03.2025




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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