Around 2018, I built an 8” scale model of the flying saucer from The Day The Earth Stood Still.
Trolling alien buffs with that thing was fun. Also the cop that lined to sit in a park’s lot across from my apartment building.
(It had a stack of 4 175mm x 15mm EDFs that I printed inside. Attitude was controlled by counter rotation for yaw and bypass air being throttled pitch and roll. It had no external moving parts and the duct was all “hiden” inside curves