5.29 The fighter aircraft F/A-18 (Hornet) has a takeoff mass of 25,400 kg, a wing area of 37.16 m, and two turbofan engines that each produces 71.2 kN of thrust. If AR = 3.5, e = 0.85, CD, = 0.02 a. Determine its absolute ceiling. Assume the climb to the absolute ceiling takes 15 min and the average engine thrust during climb is equal to 90% of the maximum thrust at sea level. Ignore the effect of the fuel consumed during takeoff. CLmax = 1.8, C = 0.7 N/h/N. b. The mass of aircraft structure is 10,455 kg. If the pilot mass is 95 kg and the aircraft has only 50 kg of fuel, what is its absolute ceiling?