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TsAGI Science Journal

ISSN Print: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2015013895
pages 161-173

MEASUREMENTS OF DEFORMATION OF THE PASSENGER PLANE WING IN FLIGHT BY THE VIDEOGRAMMETRY METHOD

Vladimir Petrovich Kulesh
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky, 140180, Russia

ABSTRACT

The results of the deformation measurement of a passenger airplane wing in flight using the videogrammetry method are presented. Recording of the images of the left wing was performed manually through the window from a passenger seat above the wing using a common digital camera (Kodak Easy Share V1253, Rochester, New York, United States). The wing structure elements easily detected in the images were used as references, which were generally the corners of the mechanization elements. The references were mainly grouped in six sections. The measurement uncertainty was estimated by calculation; for linear displacements the uncertainty was from 6 mm in the neighboring section to 10 mm at the wing tip and for angular displacements the uncertainty was from 0.2 to 0.8°, respectively. The measurements were carried out for four regimes, namely, cruising flight, flight with deflected interceptors, flight with extended flaps, and while taxiing along the ground with a quenched speed. It was obtained that the maximal values of the bending elastic deformation at the wing tip varied in the range of 600−1200 mm in the vertical plane and in the range of −100 ± 150 mm in the horizontal plane. The total elastic deformation of the wing torsion achieved a value of 2−2.5°.


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