silent 3 bladed prop - I got the equation curves down in inventor.

Uppdate 29.11.15
Added 9X4.5 blade sett, (Prop4) i hadent done this for a while so i hope i got it right.

I finally got the equation curves in inventor all set, if somone wants a spesific airfoil profile let me know.
This has less tip turbulence and makes a lot less noice
I use it as a silent replacement for 5-7" props for my quad.
3 mm axel
print as solid.
I print it on hight resolution and treat it with acetone vapour
I have upploaded an inventor file with a naca profil