NOTE: DO NOT MOVE ON TO THE NEXT PAGE WITHOUT ATTEMPTING THESE THREE QUESTIONS!

Consider an aircraft with the following aerodynamic & mission specification: 

• CD0 = 0.0179; k = 1.17; AR = 8.8

• Cruise Mach = 0.80 at 34,000 ft

• Throttle setting 78%

• Cruise weight = 0.95 % MTOW

• Residual rate of climb allowance = 1.9 m/s

Answer the following three questions in turn:

Q1 What is the density of the atmosphere at the cruise altitude, in kg/m³

, to 4 d.p.?