The Pack Method for Compressive Tests of Thin Specimens of Materials Used in Thin-Wall Structures
This is a 1939 NASA technical report, from the NACA-era aeronautical research series, describing the pack method for compressive testing of thin specimens used in thin-wall aircraft structures, written for engineers and materials testers. Its pictures are black-and-white photographs of machined metal test fixtures, a clamping jig with knurled screws, a sectioned test rig, and a large hydraulic compression press with twin gauge dials, showing precise, utilitarian machinery that a designer might borrow for industrial, mechanical, or vintage technical-drawing looks.
