The Vertical Wind Tunnel of the National Advisory Committee for Aeronautics (1931)
NASA Technical Reports Server (NTRS) · leaf 8
sts were also made to show the F=wind velocity, feet per second, effect of changes in the tunnel air speed on the C\ = coefficient of rolling moment due to roll, = ^r-^ results. A 5 by 30 inch model of the N. A. C. A. 84 airfoil, where X = rolling moment about dynamometer axir, which had been… … Figure 4.—Autorotation and rolling moment apparatus set up in vertical wind tunnel , pb tunnel. Figure 4 shows the set-up of apparatus includ- all in a consistent system of units. (!urves of ^ « versus ing an airfoil, the dynamometer and controls, the angle angle of attack are given in Figures 5,…
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