Preliminary wing model tests in the variable density wind tunnel of the National Advisory Committee for Aeronautics
This is a 1926 technical report from the National Advisory Committee for Aeronautics, issued by NASA's technical reports server, presenting preliminary wind tunnel test results for wing models in the variable density tunnel for aerodynamicists and engineers. The pictures are plain line graphs of lift coefficient against drag coefficient, with curved polar plots, labelled angle-of-attack marks, grid lines, and small airfoil cross-section sketches, offering a designer little beyond clean graph-paper layout and tidy labelled curves.
