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 Jahrbuch 1930 der Deutschen Versuchsanstalt fuer Luftfahrt E. V., pp. 227-234, 30 figs.)
Optic photographic methods for measuring deformation of aircraft
Optisch-photographische Formaenderungsmessungen an Luftfahrzeugen
1930
7 pages
30 Figs.
Article (Journal)
German
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