The Present Status of Airship Construction, Especially of Airship-framing Construction
This is a 1938 NACA technical memorandum by the National Advisory Committee for Aeronautics, a government research body, on airship construction and framing. It is written for aeronautical engineers and records the state of airship structural design of its time. The pictures are black-and-white photographs of Zeppelin-type framing: girders, joints, ring structures and assembly work in hangars, with the ZMC-2 metalclad airship and Goodyear pressure blimp. A designer could take from them the lattice geometry of triangulated steel frames and the rigid skeletal forms of early airship interiors.
