Air Reactions to Objects Moving at Rates Above the Velocity of Sound with Application to the Air Propeller
This NASA technical report from 1922 is an aerodynamics study of air forces on objects moving faster than sound, applied to propeller design, written for engineers and researchers. Its pictures are line drawings of mechanical test rigs and propeller apparatus, plus plain grid graphs of thrust against tip speed and pitch ratio; a designer might take their spare, technical diagram style and the clean hatched base blocks and dashed centre lines as models for schematic illustration.
