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## Main Question or Discussion Point

I've done an experiment lately on the NACA-0012 and I've found that as the angle of attack increases, the moment becomes more negative. I wanted to know what does that negative value say about the characteristics of the airfoil, and what is its importance.

If someone could help me out, this would be greatly appreciated.

Thank you very much.

If someone could help me out, this would be greatly appreciated.

Thank you very much.