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lift and drag coefficient definition?

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Old   November 24, 2010, 11:16
Default lift and drag coefficient definition?
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Florian Becker
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Hallo,

i want to calc the forcecoeffs with the "libforces.so" Library. I also got it to work but now i have a problem how the coefficients are defiened?

i know the definition: c_d = (2 * F_d)/(rho*U*Aref)

In aeronautics the Aref is the area of the Wing from above ( projected area), and in automobile problems Aref is the projected area from the front.

And for want do i need a lref?

greetings,
draufunddran
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Old   November 26, 2010, 08:18
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Florian Becker
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