In this post I found the full alpha range polar of NACA0012 Is there an aerofoil that gives reasonably good lift for both air flow directions: forward and backward?

I found a graph for Cl and for Cd, which is very interesting. I was wondering where this graph comes from and if the same was existing for Cm?

  • $\begingroup$ If I remember correctly I got them from old NACA or NASA reports, when I was making the flight model for a helicopter simulator. Looked for them, cannot find them, sorry. $\endgroup$ – Koyovis Feb 29 at 0:32

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