Tests of the N.P.L. airship models in the variable density wind tunnel
This NACA technical report from 1927 presents wind tunnel test results for National Physical Laboratory airship models, published by the NASA Technical Reports Server collection. Its pictures are engineering graphs of drag coefficient against Reynolds number and of velocity and pressure distributions along an airfoil chord, drawn in plain black lines on white grid paper, offering a designer a clear model for technical charting and data-plot layouts.
