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A wing of 2 percent camber, 5-in chord, and 30-in span istested at a certain angle of attack in a wind tunnel with sealevelstandard air at 200 ft/s and is found to have lift of 30 lbfand drag of 1.5 lbf. Estimate from wing theory (a) the angle ofattack, (b) the minimum drag of the wing and the angle of attackat which it occurs, and (c) the maximum lift-to-drag ratio.

A wing of 2 percent camber, 5-in chord, and 30-in span istested at a certain angle of attack in a wind tunnel with sealevelstandard air at 200 ft/s and is found to have lift of 30 lbfand drag of 1.5 lbf. Estimate from wing theory (a) the angle ofattack, (b) the minimum drag of the wing and the angle of attackat which it occurs, and (c) the maximum lift-to-drag ratio.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A wing of 2 percent camber, 5-in chord, and 30-in span is
tested at a certain angle of attack in a wind tunnel with sealevel
standard air at 200 ft/s and is found to have lift of 30 lbf
and drag of 1.5 lbf. Estimate from wing theory (a) the angle of
attack, (b) the minimum drag of the wing and the angle of attack
at which it occurs, and (c) the maximum lift-to-drag ratio.

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