Just wanted to let everyone know that this plugin still works! I am using an older version of Sketchup, 2015, but still it did a nice job exporting my Sketchup model. Thank you for this very useful plugin!

The answer from Smustard is yes...

Bill

You were right sir, I was able to fix the geometry and now the subtract is working! Thanks!

Bill

Hi SS, thanks for taking a look at this! I'll see if I can figure out where those extra edges came from. They shouldn't be there, the trailing edge is a straight line.

Bill

Attached is a file that shows the problem. The scenario is that I am trying to create top and bottom negative molds for a composite RC glider horizontal stab. There are solid objects for the top and bottom of the stab, and the top and bottom of the mold. I would like to subtract the top stab solid from the top mold solid etc.

I did the operation successfully on a test file with little regard to exact sizing and placement of the pieces, I just wanted to see if it would work. And it did. Then when I created the correct geometry, it doesn't work properly. The negative mold cavity should look like half of a symmetrical airfoil. There are fairly obvious problems when you do the subtract. The file is scaled up 100x which is how I have been working with it.

Any suggestion would be much appreciated!

Bill

Subtract Problem.skp

@box said:

You can use another of Fred's excellent plugins to cleanup before lofting.
Here it is cleaned with Curvizard then Curviloft.

You may have been able to loft it, but can you make it into a solid? I have been able to loft using 4 the airfoils, but even though it looks good, there are too many errors to make it into a solid. I can get faces on the root, tip, and trailing edge, but Solid Inspector**2 finds hundreds of problems that it says cannot be fixed automatically.

This is with Sketchup 2015, I upgraded to see if that would improve things. It didn't.

Hi Box -

I have been looking at the documentation for Curvizard and I see there are quite a few settings on the buttons palette that affect the way the tool works. Would it be possible for you to share with me the settings you used to clean up the curves? The video above is tightly cropped so the settings are not visible. Thanks!

Bill

@box said:

You can use another of Fred's excellent plugins to cleanup before lofting.
Here it is cleaned with Curvizard then Curviloft.

That is amazing, thank you so much! I installed Curvizard, followed the video, and everything was looking good until the last loft segment. Then I got a bugsplat.

Any ideas? I'm using Sketchup 2013 on a Mac if that makes any difference.

Bill

Hi - I have been using this great plugin to design a sailplane wing. I hope to be able to create either a mold or plug using a CNC router from the design. The main part of the wing and the very small end portion of the wingtip are done, but the elliptic section in between won't loft.

In the attached file, there are 7 curves representing the airfoil shape at different stations along the wingtip. Everything has been scaled up 100x to avoid the "small edge" problem. The trailing edge of the foil is left open as it is easy to add this face once the rest of the surface is lofted.

I can loft between most pairs of adjacent foils successfully, but when more are added, Curviloft "twists" the vectors at the trailing edge. The problem seems worst on foils 3 and 4, counting from the root. I have tried untwisting them using the plugin features, but I can't get that to work.

The edge count in the foils is pretty high, as these are automatically generated by an airfoil program. I don't have any convenient way to control this. I have a feeling that if this could be reduced, it might work. I was hoping though that some one would have another suggestion.

Thanks!

Bill

Loft Problem.skp

I've made some progress. I learned how to import a real airfoil with a non-zero thickness trailing edge (NACA 0006) and loft it into a simple fin shape. Then I used the technique in the video to make a fillet. It's pretty good and I'm going to close this thread. Thanks for the help cotty!

Fillet 2(v6).skp