The aerodynamic characteristics of seven frequently used wing sections at full Reynolds number
This is a 1927 NASA technical report, published as a government aeronautics study, that tests seven commonly used wing sections at full Reynolds number. The pictures are plain engineering graphs of lift coefficient against drag coefficient and angle of attack, drawn as black curves on white grid paper with labelled airfoil series such as U.S.A.-5, U.S.A.-27 and U.S.A.-35B. A designer might take from them the clean, technical line-and-label style of early aerodynamic data plots, with curved trajectories and small annotated numbers.
