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A wing of area 1.5 ft2 and aspect ratio of 6 is tested in a subsonic...

A wing of area 1.5 ft2 and aspect ratio of 6 is tested in a subsonic wind tunnel at a velocity of 77 knots at standard sea level conditions. At an angle of attack of -1 degree, the measured lift and drag are 0 and 0.181 lb, respectively. At an angle of attack of 2 degrees, the lift and drag are measured as 5.0 and .23 lb, respectively. Calculate the span efficiency factor (i.e. Oswald efficiency factor).

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genius_generous answered 2 weeks ago
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