first of all you have tu extract a surface of a fuse side then you can to divide this part in a, for example, 5 parts, draw plane exch sector, and then rotate 3d each part to align and plane and to do siluette , the error was very little, other posibilitte is first "extract a surface" of a fuse side, then draw a plane vertical and "pull" over that surface the extract surface. The error was a litlle more, but it will depend of the curve of fuse side.
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Sorry my english...