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Question: consider a linear jet flying at a velocity of 250ms...

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Consider a linear jet flying at a velocity of 250m/s at an altitude of 10km, where the density and temperature are 0.414 kg/m3 and 223K, respectively. Consider also a one-fifth scale model of the Lear jet being tested in a wind tunnel in the laboratory. The pressure in the test section of the wind tunnel is latm 1.01x105 N/m. Calculate the necessary velocity, temperature, and density of the airflow in the wind-tunnel test section such that the lift and drag coefficients are the same for the wind-tunnel model and the actual airplane in flight.

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