1.   

Boeing 737-600 has the following data: take-off weight (55000 kg), wing area (126 m2), aspect ratio (AR-9), e = 1, CD0= 0.02 and variation of lift coefficient with angle of attack is showing in figure. At take off stage, the angle of attack (10 degree). A-Determine the drag force at take off. B-If the aircraft turn with angle of bank. B-Determine the drag force generated at this condition speed of aircraft at takeoff (Vtakeoff=1.15 Vstall) and air density (pair=1.225 kg/m3)