Comparative Tests of Pitot-static Tubes
A 1935 NACA Technical Note, Comparative Tests of Pitot-static Tubes, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers measuring airspeed and pressure. Its three pages are typeset graphs of pressure-error curves for eight tube types and a photograph of the test equipment assembly. A designer could take from it the clean, technical look of mid-century engineering charts: thin black grid lines, labelled curves in a restrained palette, and plain captions set beneath the figure.
