Pressure Distribution on a Slotted R.A.F. 31 Airfoil in the Variable Density Wind Tunnel
This is a 1929 NACA technical note, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers, reporting wind tunnel measurements of pressure distribution on a slotted R.A.F. 31 airfoil. The pages are mostly plotted pressure-coefficient curves with upper and lower surface traces across several angles of attack, shown as dense line graphs on gridded paper. A designer could take from them the clean, restrained vocabulary of engineering charts: fine grids, dashed and solid comparison lines, and labelled captions set in typewritten type.
