Wind-tunnel Tests of a Cyclogiro Rotor
This NACA technical note from 1935 reports wind-tunnel measurements of blade lift and drag on a cyclogiro rotor, written by the NACA for aeronautical engineers and researchers. Its pictures are plain engineering graphs: gridded plots of coefficient curves with labelled data points and figure captions, offering a designer little beyond the restrained layout of technical charts and their dense axis-labelling.
