Experimental Verification of the Theory of Oscillating Airfoils
A 1939 NASA technical report on experimental verification of oscillating airfoil theory, issued through the NASA Technical Reports Server for aeronautical engineers and researchers. The single photograph shows a grey metal test rig: a long horizontal bar or airfoil section spanning two sturdy pedestal frames, one fitted with a small electric motor and drive housing, with a scale marker on the floor. A designer could draw on its plain industrial machinery look, with heavy steel bases, exposed drive units and a clean, unadorned monochrome setting.
