Idea: Horizontally Rotating Electric Fan
What if, rather than fan blades rotating vertically you had one large, vertical (upright) blade that rotated horizontally round and round.
Surely something that size, perhaps shaped like a rectangle moving rapidly round would move more air than a normal fan.
Note: I don't mean like ceiling fans that they use in hotter countries. I mean like a standing flat obelisk that spins round as I said, my fan blade is vertical and upright. Imagine the obeslisk from 2001: A Space Odyssey spinning round.