Calculation of wing spars of variable cross-section and linear load
A 1925 NASA technical memorandum on calculating aircraft wing spars with variable cross-section under linear loading, issued for aeronautical engineers and structural designers. Its pictures are plain engineering line diagrams: load and bending-moment curves plotted against span, a tapered beam sketch with labelled forces, and stacked graphs of inertia, longitudinal and transverse loads, useful to a designer wanting clean technical charts.
