airfoil parametric bulb for rc sailboat

### naca (or any airfoil) parametric bulb with Openscad. Perfect for 3d printed (lead casting) rc sailboat bulb. Thingiverse is missing archive or directory upload - not appropriate for openSCAD. Please take the complete source from my GITHUB: Complete source code. Code > Download ZIP. 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