US Army MC-4/5 ram-air parachutes were tested in the 80- by 120-Ft test section of the National Full-Scale Aerodynamics Complex. Arrays of targets on the upper and lower surfaces of the central cell of the canopies were measured by stereo photogrammetry, and the target positions were used to estimate both the shape of the cell and angle of attack of the canopy. Forces and moments were measured by a six-axis load cell. Based on the photogrammetry and load-cell measurements, the relationships between lift, drag, and angle of attack were determined over a range of trailing-edge flap deflections, front riser lengths, and free-stream airspeeds. This paper describes the test, with an emphasis on the photogrammetry measurements, and presents a summary of results.


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    Title :

    Shape and Angle-Of-Attack Measurements of Ram-Air Parachutes by Stereo Photogrammetry in the National Full-Scale Aerodynamics Complex



    Conference:

    2019 AIAA Aviation and Aeronautics Forum and Exposition ; 2019 ; Indianapolis, IN, United States


    Publication date :

    2019-06-17


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English





    AIAA-2019-2806: Shape and Angle-of-Attack Measurements of Ram-Air Parachutes by Stereo Photogrammetry in the National Full-Scale Aerodynamics Complex

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    Cockrell, David J. | TIBKAT | 1987


    Aerodynamics of Supersonic Parachutes

    C. W. Peterson | NTIS | 1987