BF109K airfoil plotting

[dave e]

Hello all,
I am new to your forum, I would like to ask if someone could please explain the NACA 2R1 14.2 NACA 2R1 11.35 airfoil numbering structure.
I am modeling the BF109K I am trying to wrap my mind around these strange numbers.
I understand NACA 4, 5, 6... numbering but the BF109 has letters numbers?

I cannot find any data that explains the 2R1 airfoils, please help...

Regards,
Dave

 

[kool kitty89]

Others here can elaborate more on this, but simply stated the Bf 109's airfoil (of any in the series) is not of any of the standard NACA airfoil series. As I recall, it's an improvement of the simple Clark-Y airfoil.