Hi,

There are a few points added so that you can create a circle at the top and bottom. Then using the last point of the real airfoil data, draw a straight line tangent to the circle for the last real control point for the airfoil curve. This is done at the top and bottom (from the right view). The larger circle at the top is the leading edge and the small circle at the bottom is the trailing edge. And yes, the trailing edge circle is really really small. This is why I'm having to use the millimeters unit system. Even the leading edge radius can be too small for MoI v2 on some examples. It won't find the tangent point, do the boolean operations, and other things when in the meters unit system. I posted an updated code that will output in the millimeters unit system.

Once the extra points are found then they are used as the start and end point of the airfoil spline, along with the other points that are in the .XYZ file. Then you mirror that curve. And lastly make arcs through the remaing points. Select the four curves and join them to make one closed curve. This is the curve that will be used for the sweep.

Merry Christmas/Happy Holidays to everyone.

Anthony