Question: A rectangular wing tested in a wind tunnel as a model 30 in. by 5 in. size has an efficiency factor ul = 0.90. The
A rectangular wing tested in a wind tunnel as a model 30 in. by 5 in. size has an efficiency factor ul = 0.90. The lift slope of the model airfoil is determined to be 0.085 per degree, with the angle of zero lift at -3. If this airfoil is used on a wing having a 42 ft span and a chord of 6 ft, what lift will be developed by the wing if it is operating at an angle of attack of 6 at 100 mph? Assume standard sea-level conditions and ul =0.90 for the full scale wing
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