Measurement of the moments of inertia of full scale airplanes
This is a 1927 NASA technical report on measuring the moments of inertia of full-scale airplanes, published as an NACA-era document for aeronautical engineers. The pictures are plain black-and-white line drawings: an axis-labelled wireframe airplane, rotated side and front views of a floatplane with a centre-of-gravity marker, and a three-dimensional inertia ellipsoid plot with angled reference axes. A designer might borrow the clean technical line work, the dashed axis conventions and the diagrammatic labelling style for minimal schematic graphics.
