Pressure-Distribution Measurements on the Hull and Fins of a 1/40-Scale Model of the U. S. Airship "Akron."
This is a 1934 NASA technical report on wind-tunnel pressure measurements taken on a 1/40-scale model of the airship Akron, prepared for engineers studying airship hull and fin aerodynamics. The two pictures show the recording manometer apparatus and the tubing bundles wired into the model's hull, giving a designer a dense, mechanical view of tangled tubes and precision instrument cases in grey monochrome.
