Hi All, does anyone know how Jedicut decides which part of an airfoil is the intrado and the extrado? I drew up an airfoil in Inkscape with root and tip for a tapered wing, and the program decides to make the intrado and extrado on different sides of the root and tip airfoils. I then tried using the root airfoil and just reducing its size for the tip. That worked until I needed to widen the trailing edges. I put the dxf files back into Jedicut and found that the intrado and extrado's were changed around!

Keith R