Wind-tunnel tests on combinations of a wing with fixed auxiliary airfoils having various chords and profiles
This is a 1934 NASA technical report, published by NACA-era aeronautical researchers for engineers and aerodynamics specialists, recording wind-tunnel tests of a main wing paired with fixed auxiliary airfoils of varying chord and profile. The pictures are engineering plots and drawings: charts of lift, drag and centre-of-pressure curves against chord percentage, and outlines of airfoil sections drawn to dimensioned lengths, with plain black lines on white grids and no decoration. A designer could take the clean graph and section-outline styling as a sober, technical visual vocabulary for diagrams, specification sheets or instructional charts.
