Calculation of Airplane Performances Without the Aid of Polar Diagrams
A 1928 NASA technical report, a reprint of an aeronautics study on calculating airplane performance without polar diagrams, written for engineers and aircraft designers. Its pictures are dense graph sheets: one plots power and wing loading curves against speed on a grid of labelled lines, and the other is a multi-scale nomogram with aligned axes for reading values across rulers. A designer could take from them the clarity of labelled, many-curve technical charts and the way aligned scales let a reader read off a result.
