MEM425F09_2.aerodynamics

MEM425F09_2.aerodynamics - C D C M Drag Polar 2 L D D KC C...

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MEM425 Aircraft Performance & Design Dr. Ajmal Yousuff Dept. MEM Drexel University
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Terminology b dx x c b c 0 ) ( 1 Yousuff MEM 425 2 chord : c Wing span : b b Wing area : S S c camber Mean-chord (geometric): aspect ratio: b 2 /S
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Aero forces Yousuff MEM 425 3 M R L D
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Aero coefficients 2 2 1 V q Yousuff MEM 425 4 Lift-coefficient Drag-coefficient Moment-coefficient Drag Polar
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Coefficients .vs. a Yousuff MEM 425 5 C L a Symmetric camber
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Unformatted text preview: C D C M Drag Polar 2 , L D D KC C C ) ( 1 AR e K 2 , L i D KC C , D C Yousuff MEM 425 6 Induced drag (induced due to lift … …) , e :Oswald efficiency factor (wing shape) Parasite drag coeff. (skin-, pressure-, wave-drag) =1 for elliptic plan form <1 for others...
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