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3. The NACA 4412 airfoil has a mean camber line given by 0.25 0.8-- for 0 s -0.4 en for 0.4 -?1 Using thin airfoil theory, calculate ?1:0 and Cl when ? = 30. m,c/4 and xcp/c for a -3 Compare the results of part (a) and (b) with experimental data of NACA 4412 airfoil (see plots below) Lift per unit length of span and circulation for an airfoil with chord length of 2 m flying at a standard altitude of 3 km and velocity of 60 m/s (same angle of attack of 3°). a. b. c. d.

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