Practical method for balancing airplane moments
A 1924 NASA technical report, the earliest in this set, titled Practical method for balancing airplane moments, with its figures drawn for aeronautical engineers working on stability and control. The first three pictures are line graphs plotting wing moment and dynamic pressure against angle of attack for various configurations, with dashed and solid curves labelled by letter, while the last is a schematic of biplane wing geometry showing chord, gap, stagger and centre of gravity. A designer might borrow the clean, sparse graph styling with its dual axes and lettered curve keys as a template for technical diagram layouts.
