Development of the Rules Governing the Strength of Airplanes. Part I : German Loading Conditions up to 1926
This is a 1933 NACA technical report by the NASA Technical Reports Server collection, tracing German airworthiness loading rules for aircraft strength up to 1926 and written for aeronautical engineers. The pictures are mostly line diagrams of load cases on aircraft and wing sections, with one photograph of a wind tunnel test model and a drawing of an Albatros biplane, giving a designer clean technical schematics with labelled force arrows and dimension lines.
