It is proposed to brake a racing car by opening an air scoop to deflect the air as shown in Figure P3.21. You may assume that the density of the air remains approximately constant at the inlet conditions of \(14.7 \mathrm{psia}\) and \(60^{\circ} \mathrm{F}\). Assume that there is no spillage-that all the air enters the inlet in the direction shown and the conditions specified. You may also assume that there is no change in the drag of the car when the air scoop is opened. What inlet area is needed to provide a braking force of \(2000 \mathrm{lbf}\) when traveling at \(300 \mathrm{mph}\) ?

Transcribed Image Text:

D Figure P3.21