Wind-tunnel Investigation of Effect of Yaw on Lateral-stability Characteristics I : Four N.A.C.A. 23012 Wings of Various Plan Forms with and Without Dihedral
This is a 1939 NACA technical report from the NASA Technical Reports Server, a wind-tunnel study of yaw effects on lateral stability for four wings of different plan forms. Its pictures are mainly engineering line graphs of coefficients plotted against angle of yaw, plus one photograph of a tapered wing mounted on a balance in a wind tunnel. A designer might take from them the clean grid-and-curve plotting style, the restrained monochrome print layout, and the stark look of a wing set against a pale tunnel interior.
