Report on Tests of Metal Model Propellers in Combination with a Model VE-7 Airplane
This is an NACA technical note from 1926, issued by the National Advisory Committee for Aeronautics, reporting wind-tunnel tests of metal model propellers fitted to a scale model of the VE-7 airplane for aeronautical engineers. The pictures are plain engineering graphs on ruled grids, plotting thrust and power coefficients against advance ratio for three-blade propellers, with one page showing a straight-line resistance curve for the model. A designer might take from them the clean, restrained look of early technical charts, with dashed and solid curves, labelled axes and fine grid lines.
