Airfoils were designed such that, by adding material to the surface, an existing wing could be modified and tested in flight. Wind tunnel experiments on inner and outer wing segments are described, giving information on the quality of actual airfoils achieved in serial production and of the LSL airfoil analysis and design computer program. The characteristics of several modern airfoils used in standard class sailplanes are analyzed and typical differences in the case of smooth surface and of rough leading edge are clarified. Wind tunnel measurements with real insect remains on a wing segment are compared with a well known simulated bug pattern and shown to have greatly different drag characteristics. The application of pneumatic turbulators to reduce the drag of an airfoil is discussed. The computer program was used to modify the wing of an ASW-193 sailplane. Flight tests are satisfactory.


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    Title :

    On the Design of Some Airfoils for Sailplane Application


    Contributors:

    Publication date :

    1981


    Size :

    47 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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