le of attack Angfe of attack Fre. 4.—Albatross aerofoil. Lift and drag coefficients and L/D. Air Fig. 5.—Sloane aerofofl. Lift and drag coefficients and I/D. Air speed 35 m, p. h. speed 35 m- p. h. raked tips is to improve the lift/drag of the aerofoils at all except the higher, angles. At inci-… … Fig. 6.—R. A, F6aerofoil. Lift and drag coefficients and L/D. Fig. 7.—Albatross aerofbiL Lift coefficients for various tips, speed 35 m. p. n. Air speed 35 m, p. h. ACTUAL v. COMPUTED VALUES. Figures 7, 8, and 9 give the foregoing lift coefficients plotted against computed values for raked tips.…
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