Contribution to the theory of propeller vibrations
A 1930 technical report from NASA's Technical Reports Server on propeller vibration theory, presenting engineering analysis through graphs rather than illustrations. Its single figure plots bending frequencies of several propeller configurations against angular velocity on a grid with labelled curves and dashed reference lines. A designer might take from it the clean, minimal style of scientific line graphs, with labelled axes, sparse black curves and dotted guides for diagrams and data graphics.
