self-intersecting

Hi, I've been trying to make a fan and as I understand it a self intersect happens when a part collides with itself when it's crossing over the axis (typically) which is not the case with how I built my project. I'm at a loss to add the fan blades on the center hub, 15 blades at 24 degrees from center. If I'm…

Would like to ask about the level of comprehension the shell tool has. Every time I go to use it it fails because of self intersection of walls, instead of just... not shelling those areas. This is already implemented in other cad programs. I just want to make a cut away of one face up to a multi-faced end; a flat face and…