A technique for determining a time history for the displacement in space of points on the inside surface of an aircraft transparency during and after the simulated impact of a bird has been developed. This method utilizes two high speed motion picture cameras located in a three dimensional space which also contains designated points on the transparency surface. The cameras are positioned so that a common field of view contains points for which deflection history is required. Displacements of the images of given points in the film frames from each camera are used to obtain positions in a three dimensional space. All optical magnifications and changes in point to camera distances are accounted for. In addition to obtaining deflection data for selected points, the films are also useful for describing the footprint of the bird on the transparency, an important improvement in the ability to model bird loading in computerized dynamic analysis efforts. As an example of the application of this process, data resulting from a bird impact on a T-38 windshield is included.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Triangulation Technique for Obtaining Deflections of Aircraft Transparencies During Bird Impact Testing


    Contributors:

    Publication date :

    1983


    Size :

    16 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    High Speed Bird Impact Testing of Aircraft Transparencies

    M. J. Coker / R. H. Magnusson | NTIS | 1978


    Aircraft transparencies

    Engineering Index Backfile | 1943


    Aircraft transparencies

    Emerald Group Publishing | 1964


    The Resistance of Transparencies to Bird Impact at High Speeds

    McNaughtan, I.I. | Emerald Group Publishing | 1964