Two-dimensional subsonic compressible flow past elliptic cylinders
A 1938 NACA technical report on two-dimensional subsonic compressible flow past elliptic cylinders, published by NASA's Technical Reports Server for aerodynamics engineers and researchers. Its three pictures are plain engineering line graphs with dotted grid lines, solid and dashed curves comparing compressible and incompressible flow, and labelled axes of pressure coefficient, angle and thickness ratio. A designer might take from them only the restrained chart style of dual-curve comparisons with minimal labelling.
