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The Effects of Some Surface Irregularities on Wing Drag (1939)
NASA Technical Reports Server (NTRS) · leaf 32
Fig.30 H.A.C.A Technical Note No. 695 .OlOi .008 0.0037-inch grains Percentage c/k » 16,300 increase .006 62. 0.0013-inch grains c/k - 46,300 •004- Cl = 0.30 … .003 , 1* - --o .006 _6£L .004 PL ■ 0 .003 3' 12. 35 5 6 7 8 9 10 15 30 R,millions Figure 30 - Increase in drag due to roughness orer the entire surface, c, chord; k, grain size.NASA Technical Reports Server (NTRS)
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