"Gloster" metal construction
A 1930 NACA technical memorandum on aircraft structure, titled "Gloster" metal construction, issued by the National Advisory Committee for Aeronautics for engineers and aircraft designers. Its pictures are line-drawn exploded views of riveted tubular joints, truss frames, bent wire and clamp fittings, numbered callouts beside each part; a designer could borrow the technical-diagram style of labelled mechanical parts and their crisp hatching.
