Yes, wire and some dividers(structure) I believe. IIRC, the coils are overlapped slightly differently as well, but don't quote me on that.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens
Yes, wire and some dividers(structure) I believe. IIRC, the coils are overlapped slightly differently as well, but don't quote me on that.
There is a "core" in a slotless stator as well, but it's a long toroid against the motor can, kinda in the shape of a long donut. You can kinda see what I'm talking about in the pic I took of a Feigao I cut in half: