Determination of Turning Characteristics of an Airship by Means of a Camera Obscura
This is a 1925 NASA technical report, issued through the NASA Technical Reports Server, on measuring an airship's turning behaviour with a camera obscura, written for aeronautical engineers. Its pictures are plain engineering graphs of velocity, radius and angle of yaw over time, a schematic of the rooftop camera setup, and a photograph of two airship images overlaid with plotted lines, offering a designer a sparse monochrome vocabulary of line charts, technical schematics and aerial photographs.
