The Pressure Distribution Over the Horizontal Tail Surfaces of an Airplane I
This is a 1923 NASA Technical Reports Server engineering report on airplane aerodynamics, written for aeronautical researchers and engineers. Its pictures are plain line graphs of pressure curves plotted against airspeed and engine rpm for horizontal tail surfaces, drawn in black ink on cream paper. A designer might take from them the clean, rhythmic wave patterns of charted data and the stark, technical look of early aviation research.
