The Inertial Coefficients of an Airship in a Frictionless Fluid
A 1924 NASA technical report on the inertial coefficients of an airship moving through a frictionless fluid, issued for aeronautical engineers and researchers. Its single picture is a graph of two curves, labelled K and k, plotted on a grid of values from 0 to 1.0 against the ratio a/c, with the curves crossing near 0.5 at a/c equal to 1. A designer might take from it a clean, minimal chart style: a labelled grid, decaying curves, and sparse engineering annotation.
