Answer Happy

Question 2 (a) Consider a twin-engined jet aircraft with a conventional configuration, from which the aircraft data is summarised in Table Q2(a). CL = 0.46 C1sa= -0.35 m = 4800 kg S = 31.8 m² b = 15.90 m CYB = -0.90 Cup = -0.07 Cnp = 0.13 CYsa=0 Table Q2a) Cnoa= -0.11 Cy&r= 0.21 C18 = 0.1 V. = 55 ms-1 po = 1.225 kg m- Cnor = -0.05 During a cross-wind landing approach, in which the aircraft has to maintain a sideslip angle of B = 6° (all derivatives above are per degree), analyse the following: (i) Assuming the aircraft maintain a steady flight with no roll and yaw motion (i.e. p=0 and r=0) write the balance in roll and yaw moment equations with da and dr as unknowns. (8 marks) (ii) Hence, or otherwise, determine the required aileron and rudder deflection to main the steady, straight and slide slip flight. (3 marks) (iii) Next, consider the balance in side-force in the same flight condition (i.e. p=0, r=0), write the side force equation and determine the bank angle of the aircraft. (6 marks) (b) Appraise the difference between slide slip angle and yaw angle. (4 marks) (c) Explain how adverse yaw is brought about in an airplane in flight. (4 marks)