In order to measure deformation of wing structure, points of interest are photographed on moving strip of sensitized paper; these points are either marked by lamp or mirror; changing deformations, particularly oscillations can be measured without inertia effect in instruments; sketches illustrate design of optograph; practical examples are given. (See also Zeit. fuer Flugtechnik und Motorluftschiffahrt, vol. 21. no. 17, Sept. 15, 1930, pp. 434-440, 30 figs.)
Optic photographic methods for measuring deformation of aircraft
Optisch-photographische Formaenderungsmessungen an Luftfahrzeugen
1930
8 pages
30 Figs.
Aufsatz (Zeitschrift)
Deutsch
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