Scale Effect on Clark Y Airfoil Characteristics from NACA Full-Scale Wind-Tunnel Tests
A 1935 NACA technical report from the NASA Technical Reports Server, presenting full-scale wind-tunnel tests of the Clark Y airfoil to study how aerodynamic performance changes with scale. The pictures show the test setup, with the airfoil mounted on support struts inside a large wind tunnel for engineers examining lift and drag. A designer might take from them the stark industrial look of big test hardware: smooth curved tunnel walls, braced steel framing, and a single wing section isolated against a grey background.
