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How do I join these two different sized circles?

I am trying to make a 90º elbow duct adapter.  I want the duct to change size as it goes around the corner.    I know I can make the smaller size make the corner then enarge once it has made the corner, but I would love for it all to happen at once.  


Best Answer

  • S1monS1mon Member Posts: 1,982 PRO
    Answer ✓
    A loft is the most straightforward way to do this. I would start the model with the loft, and then shell a solid or thicken a surface. Loft doesn't like to work with faces that have holes in them, you would have to do it in two lofts. You will also find that having a small gap between the two circles is probably easier than having them touch and be tangent.

    Here's a version that I did. I needed to split the circles for the loft to help it not twist in a weird way, and I changed the offset of the curve plane so that it didn't get tortured at the tightest area of the corner. The move face is to make sure the bottom plate and the shelled loft join cleanly.



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