The Analysis of Aircraft Structures as Space Frameworks. Method Based on the Forces in the Longitudinal Members
A 1929 NASA technical memorandum on analysing aircraft structures as space frameworks, based on the forces in their longitudinal members, presented as a plate of engineering diagrams for technical readers. Its pictures are line drawings of three-dimensional wireframe box and prism geometries with force arrows, numbered figure labels and a few shaded planes, which a designer could use for schematic technical diagram layouts or isometric linework.
