5.34 Determine maximum speed and absolute ceiling of the reconnaissance jet aircraft Lockheed SR-71 Blackbird (Figure 4.33) with the following data: mro = 78,000 kg, S = 170 m, T = 2 151 kN, b = 16.94 m, AR = 1.7, e = 0.94, CD = 0.032 (at supersonic speeds), CD, = 0.017 (at low subsonic speeds) Assume the climb to the absolute ceiling takes 12 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.