Tutorial for designing a wing for 3D printing. I cover the basics for design in order to get a physical model the easiest. It is heavy but a good background.
EDITS:
The distance for the internal structure should be (wall thickness)+0.2mm not 2x(wall thickness)+0.2mm
Find airfoil coordinates:
http://airfoiltools.com/airfoil/naca4digit
And Cura Profile:
https://megaupload.nz/y0Z688w9n9/Wing_Profile_curaprofile