Experiments with a Sphere from which the Boundary Layer Is Removed by Suction
This is a 1926 NACA technical memorandum (No. 388) from the NASA Technical Reports Server, reporting wind-tunnel experiments on a sphere with boundary-layer suction, written for aerodynamics engineers and researchers. The pictures are line diagrams of the test apparatus with dimensioned sketches, a flow-pattern sketch of subcritical flow around a circle, and a pressure-distribution graph with three labelled curves plotted against angle phi. A designer might take from them the clean technical-drawing style of early aeronautical figures and the simple streamline sketch as a motif.
