Twelfth Rhon soaring contest, 1931
A 1932 NACA technical memorandum by the NASA Technical Reports Server collection, reporting the twelfth Rhön soaring glider contest of 1931 in Germany for aeronautical engineers and researchers. Its pages carry contour maps of the Rhön hills with flight tracks, altitude profiles and barograms, showing the routes gliders flew over terrain. A designer might take from them the layered look of topographic contour lines overlaid with hand-drawn looping traces, a precise technical diagram style with clean graph grids and labels.
