Hydrostatic Tests of an Airship Model
A 1922 NASA technical report, compiled from NACA-era records, presenting hydrostatic tests on a model airship and recording how its ballonet and water-ballast arrangements behaved under different fill conditions. The pictures are black-and-white photographs of a dark elongated model hull suspended from a wooden cross-beam over a gridded backdrop, labelled as figures. A designer might take from them the streamlined tapered hull, the rigging of cords and rings, and the clean technical plate layout.
