Stability of Thin-Walled Tubes Under Torsion
A 1935 NASA technical report, issued through the NASA Technical Reports Server, presenting engineering research on how thin-walled tubes behave under torsion. Its plates are black-and-white photographs of purpose-built testing apparatus, including a tensile and bending material testing machine, a dial thickness tester on a steel section, and a large laboratory test frame with a lattice of timber members. A designer might draw from the austere, measured look of industrial test equipment: bare steel, dial gauges, and exposed mechanical linkages.
