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how to import naca airfoils into viacad pro - how to import naca airfoils into viacad pro
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Magnus27  
#1 Posted : Thursday, May 3, 2018 12:16:15 AM(UTC)
Magnus27

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Could someone kindly describe how to import naca airfoil coordinates (Spline) into ViaCAD Pro?
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UGMENTALCASE  
#2 Posted : Thursday, May 3, 2018 2:01:20 AM(UTC)
UGMENTALCASE

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Hi, needs to be saved as a .spl file i think. And in the .spl file the first line needs to read SPLINE and something else. There is some info somewhere on it.
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murray  
#3 Posted : Thursday, May 3, 2018 6:30:08 AM(UTC)
murray

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It's a coordinate list. The coordinate list is headed "THROUGHSPLINE", then "THROUGHTOLERANCE", then "0.00001"
No commas in the coordinates, use a space as delimiter, add a "0.0" third, Z coordinate, give the text file a name. Import the file using import|spline. Tim's "Tricks & Tips" .pdf notes that the data doesn't do anything with the slope of the start and end of the curve, so the curve doesn't have continuity through them. But I was surprised to see that even though the start and end vertices had the same coordinates, VCP didn't make the endpoints coincident. I don't know what's going on there, an error on my part, that particular airfoil (mh200 if anyone cares) and I haven't had time to pursue it yet.
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