Aerodynamic Investigation of a Cup Anemometer
This is a 1934 NASA technical report on aerodynamic testing of a cup anemometer, a wind-speed instrument, prepared for aeronautical researchers and engineers. The pictures are plain engineering line drawings: polar graphs of torque and force coefficients against cup position, and a sectioned mechanical drawing of the anemometer with labelled parts, offering a designer little beyond technical diagram style and graph layout.
