The tornado costume was a success!
The mechanism was not as dependable as I would have preferred. The socket-set connections were good, but I should have welded the final upright link to the metal bolt inside the “propeller” crossbar at the top.
I shouldn’t have used fiberglas insulation. Spray paint helped keep it subdued, but the fibers still caught the air and broke free, flying around inside and outside of the costume. The fiberglas was irritating.
I’m happy to have created a new style of harness for a costume. I hope it inspires other rotating costumes in the future… and I hope I don’t have to compete against them.