The Effects of Shielding the Tips of Airfoils (1925)
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at augmented by this increase in ^Sipparent aspect ratio," as shown in Figure 6. 1.0 0.8 0.6 a 0.6 CtO.4 o.a 0.0 0.0 -o.a. .80 TOO .08 ^ .18 .16 .04 Co 4" 8" IE" Pig. 5 Angle of of tack, oc Fig. 6 Figure 7 covers the work on washed-out tips.^ The very small effect produced by the 8^ washout is… … drag is greater than the decrease of induced drag at all attitudes, thus demonstrating the im- practicability of this device. The effects of washed-out tips upon the lift curve slope arc shown in Figure 6. * Ergebuisse der Aerodynamischen VersuchsanstiUt zii Gottiagcn. P. 63-69, abb. 47 and 50.…
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