Joint Report on Standardization Tests on N.P.L. R.A.F 15 Airfoil Model
A 1930 joint report from NASA's technical report collection, issued by several laboratories, that documents standardization wind-tunnel tests on the N.P.L. R.A.F. 15 airfoil model for engineers and aerodynamics researchers. Its pictures are plain engineering graphics: lift-against-drag and lift-coefficient curves plotted on gridded paper with labelled angle-of-attack points, a performance chart with dual axes, and a sectional drawing of a wind tunnel. A designer might borrow the restrained grid-and-annotation look of technical charts for diagrammatic layouts.
