Experimental Investigation of Wind-Tunnel Interference on the Downwash Behind an Airfoil (1937)
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BEHIND AN AIRFOIL 0 4 8 12 16 20 24 28 8 12 16 20 24 28 32 36 40 Longitudino/ distonce from quarter- chord point, in. Longitudinal distance from quarter-chordpoint in. (a) 5- by 30-inch airfoil; c -3.8°; CV.,0.25. (d) 10- by 30-inch airfoil; a, -1.8°; Cl, 0.21. 4 8 /2 /6 20 24 2° 4 8 /2 /6 20 24 28… … chord point, in. Longitudino/ distance from quarter - Longitudino! distance from quorter-chord'point, in. (c) 5- by 30-inch airfoil; a, 9.2°; CL, 1.09. (f) 10-by 30-inch airfoil; a, 11.2°; Cl, 0.91. Figure 7.—Downwash-angle contour lines from surveys in the full-scale wind tunnel on two airfoils of…
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