naca-parametric-bulb

Airfoil parametric bulb with Openscad. Perfect for 3d printed (lead casting) rc sailboat bulb.

This project manages:

• symmetric / asymmetric airfoil profile.
• complex/custom section - included circle, ellipse, flatten ellipse, round square, trapeze.
• beaver tail.
• split rendering

How-to:

• Download Github ZIP archive
• Install OpenSCAD
• Decompress the archive
• Run openSCAD on bulb.scad
• Edit bulb.scad and tweak the header to fit your needs (documentation in the code)

Add new airfoil:

• You have complete "ready to use" scad files on my github Airfoil database
• Choose one and move it to the directory "airfoil"
• Open the scad file to copy the header (copy/paste part) - 4 lines.
• Open the bulb.scad to paste the header, replace the previous airfoil with yours.

To reach the right weight:

• generate the STL file
• get the associated volume in cm3 (DuckDuckGo: "stl volume calculator")
• compute your material volume to weight (i.e. lead weight grams per cubic cm: 11.342)
• fine tune the scale factor or the form