Recent researches in airship construction III : a new type of nonrigid airship
A 1924 NACA technical memorandum on airship construction, published by the National Advisory Committee for Aeronautics and preserved through the NASA Technical Reports Server, written for engineers and aircraft designers. Its pages are mostly engineering diagrams of longitudinal stress distribution on hulls and a cutaway of a nonrigid envelope with gas cells and air-pressure ducts, plus a pair of photographs of an airship and a close view of a fin or joint.
