The American airship ZR-3
This is a 1924 NASA technical report, digitised from a typescript memorandum, on the American rigid airship ZR-3, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers. Its pictures are black-and-white technical drawings and photographs: plan and elevation views, cross-sections of gondolas and engines, and a close-up of a riveted lattice girder joint, showing how structure, geometry and mechanical parts were drawn; a designer could take clean line diagrams, labelled callouts and dense lattice patterns as reference for schematic or industrial graphics.
