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The Effect of Surface Irregularities on Wing Drag. 3; Roughness (1938)
NASA Technical Reports Server (NTRS) · leaf 12
Figs* 1,3 … Figure I.- Airfoil of 5-foot chord with forward 20 percent polished, mounted in wind tunnel* SPRAY FAINTED SANDPAPERED- POLISHED AND WAKED 0 ,05 JO in, J I \ > , j ^^a^qj SCALE-INCHES Figure 3*- Photomicrographs of surface roughness*NASA Technical Reports Server (NTRS)
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