The Measurement of Fluctuations of Air Speed by the Hot-Wire Anemometer
A 1930 NASA technical report on measuring air speed fluctuations with a hot-wire anemometer, presented as a scientific publication for aeronautical researchers. The pictures are line drawings of test apparatus: a wind tunnel rig with a motor and tachometer, wire mountings on bakelite plates, and an electrical amplifier circuit diagram with resistors and valves. A designer might take from them the precise, labelled technical diagram style, with thin black linework, handwritten-style callouts and plain grid graphs.
