Sweeping Tangent to a Surface
If you select a sweep trajectory that is the edge of a surface, and the object being swept is tangent to that surface, then the initial tangency is maintained along the entire sweep, as shown in the figure below.
If you select a sweep trajectory that is the edge of a surface, and the object being swept is tangent to that surface, then the initial tangency is maintained along the entire sweep, as shown in the figure below.