Analysis of 2-spar cantilever wings with special reference to torsion and load transference
This is a 1936 NASA technical report, published by NASA's Technical Reports Server, analysing how two-spar cantilever aircraft wings resist torsion and transfer load between spars, written for aeronautical engineers. The pictures are plain line diagrams and graphs: wing frame sketches with arrows marking loads and reactions, deformation drawings of twin spars, and charts plotting torque and bending moment against station along the span. A designer could borrow their clean technical line style and the stepped, dashed-and-solid graph layouts.
