Tests on a model of the D.F.W. airplane T-29 of the "Deutsche Flugzeug derke" (German airplane works)
This is a 1924 NACA-style technical report of wind tunnel tests on a scale model of the D.F.W. T-29 airplane, produced by the Deutsche Flugzeugwerke for aeronautical engineers and researchers. Its pictures are plain black-and-white line graphs of lift, drag, and moment coefficients plotted against control surface deflections, with dense hand-drawn curves and labelled angle markers. A designer might borrow the clean grid layouts, the fan-like sweep of curves, and the small numeric labels as graphic texture.
