The air-handling system for a large indoor sky diving (vertical) wind tunnel has a fan at the inlet (bottom), and a test section (where the users fly) with a circular crosssection of 5.5 m diameter. The designers want to achieve a 200 km/hr wind speed, with the air in the test-section nominally at 22 ºC and 1.0 bar. How much air (mass flow rate) will the fan that runs the wind tunnel have to supply to meet these conditions? If the pressure of the air at the exit of the wind tunnel is 0.2 psi lower than the pressure in the test section, what would be the air velocity at the exit, assuming the air temperature remained at 22 ºC?