Answer Happy

11.62 An airplane wing having the characteristics shown in Fig. 11.23 is to be designed to lift 8900 N when the airplane is cruis- ing at 60 m/s with an angle of attack of 3º. If the chord length is to be 1 m, what span of wing is required? Assume p = 1.22 kg/m? o assume assume for , and kind by then a 1
Figure 11.23 1.20 Coefficients of lift and drag for three wings with aspect ratios of 3, 5, and 7. [After Prandtl (23).] 1.00 A = 2 = 5- A = 2 = 3 0.80 CL CL 0.60 0.24 0.40 0.16 3 5 Ср. ففي الا به Ср 0.20 0.08 0 0 4 0 4 8 12 16 Angle of attack, a, degrees The total drag of a rectangular wing is computed by bepv? FD = (Cpo + CD) 2