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Old   December 30, 2008, 11:22
Default about Lift-Drag coefficient
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i'm analysing Cl,Cd of airfoil but when i'm increase the airfoil cord length (same profile-NACA2515) the Cl,Cd is increase too

is this what suppose to be?

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Old   December 31, 2008, 22:29
Default Re: about Lift-Drag coefficient
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Everything else equal, changing the chord length will change the Cd and Cl. When you change the chord length, you are also changing the Reynolds Number and consequentially the lift and drag characteristics of the airfoil
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