Repeat Problem 17 30 if the angle of attack is the stall point, 19 6 deg 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 deg 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 FFD 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 25 30 Angle of attack, a (deg)

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.

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

Cz]CD FFD 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 25 30 Angle of attack, a (deg)

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