Repeat Problem 17.30 if the angle of attack is the stall point, 19.6°. Repeat Problem For the

Question:

Repeat Problem 17.30 if the angle of attack is the stall point, 19.6°.

Repeat Problem

For the airfoil with the performance characteristics shown in Fig. 17.11, determine the lift and drag at an angle of attack of 10°. The airfoil has a chord length of 1.4 m and a span of 6.8 m. Perform the calculation at a speed of 200 km/h in the standard atmosphere at

(a) 200 m

(b) 10 000 m.

Cz]CD FÖFD 2.00 t0.40 CD -35 Stall point a =19.6 + 1.50+0.30+F30 -FFD -25 1.00+0.20+20 15 0.50+0.10+ 10 0+0 -5 20 10 15