Full-Scale Wind-Tunnel Tests of a PCA-2 Autogiro Rotor
This is a 1935 NASA technical report on full-scale wind-tunnel tests of a PCA-2 autogiro rotor, published for aeronautical engineers and researchers. The pictures are plain technical graphics: contour maps of induced yaw and downwash angles over the rotor disk, plus a photograph of protuberances on a blade, offering a designer contour-line diagrams with labelled degree values and a sense of how airflow was measured.
