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Anyone with some downforce knowledge?

Old 10-02-13, 10:48 AM
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Rotary Freak
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Anyone with some downforce knowledge?

Ok , so using this formula

http://en.wikipedia.org/wiki/Downforce <-- wont copy paste .

I'm trying to find what the angle of attack should be on a wing .

according to this http://en.wikipedia.org/wiki/Angle_of_attack
the problem is on a car's wing the angle of attack is the opposite as shown here . so does that mean that it would be negative angle ,

for example .. if said wing is said to have 15 degrees angle . how would you plot that into the equation ?

as a 15* ?? do you plot it as a decimal .54, fraction ? 360/15 ? is it negative since the angle is opposite as to what it shown for aircraft which is where normally the equation is used for ?

Last edited by Tem120; 10-02-13 at 10:52 AM.
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Old 10-02-13, 11:14 AM
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The angle of attack is dependant on the conditions and the desired amount of downforce.


The manufacturer should have that info available to you if they are any good.

Example: APR APR Performance - GTC-300 - CFD Data & Analysis
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Old 10-02-13, 11:20 AM
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Originally Posted by RENESISFD View Post
The angle of attack is dependant on the conditions and the desired amount of downforce.


The manufacturer should have that info available to you if they are any good.

Example: APR APR Performance - GTC-300 - CFD Data & Analysis
Yes I have the angles the wings settings have .


it also gives CL , per setting , at 15* it has -.075 CL so if at 15* its at that would it be redundant to plug the angle of attack again since it was already calculated into the lift coefficiency ?

Last edited by Tem120; 10-02-13 at 11:25 AM.
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