The Aerodynamic Aspect of Wing-fuselage Fillets
A 1935 NASA technical report, published by NACA-era aeronautical researchers, presenting wind-tunnel test results on how fillets at the junction of wing and fuselage change aerodynamic drag. Its pictures are engineering polar diagrams: plotted curves of lift coefficient Ca against drag coefficient Cw for wing alone and for several model configurations, with airfoil section sketches in the legends. A designer might borrow the clean grid-plotted line charts, the labelled curve legends and the small airfoil profile icons as a restrained technical graphic style.
