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15 Apr 2009 22:41:58 IST

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Air is streaming past a horizontal air plane wing such that its speed is 120 m/s over t

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Air is streaming past a horizontal air plane wing such that its speed is 120 m/s over the upper surface and 90 m/s at the lower surface. If the density of air is 1.3 kg/m3, find the difference in pressure between the top and bottom of the wing. If the wing is 10m long and has an average width of 2m, what will be the Gross lift on the wing? 1. 81.9 N 2. 8.19 kN 3. 81.9kN 4. 819kN

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Jammalamadaka

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15 Apr 2009 22:52:36 IST

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Can someone give an answer and solution?

Jammalamadaka

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15 Apr 2009 23:21:36 IST

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Solution Please....

Jammalamadaka

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22 Apr 2009 17:39:35 IST

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........

Jammalamadaka

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22 Apr 2009 18:02:38 IST

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.................

Sujit

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22 Apr 2009 18:12:34 IST

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ans is C

P₁ +1/2v₁² = P₂ +1/2 v₂²

where v₁ and p₁ are the vel. and presuree below the wing and p₂ and v₂ vel and press abv the wing

substituting the given data we find the presuure diffrence

multiplying the abv pressure diff. with area of the wing we get the force

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