I quite like these more - mainly because they could be added onto a lamp that puts off heat, and be kind of a perpetual decoration with subtle motion.
I love your “dad turbine” design, and the flying wing has some magical quality to it.
Thank you so much for sharing!
We used to do that as children as well: a spiral cutted out of paper on top of a long skewer stuck into a potato. Felt like perpetual motion somehow.
It works if you put it on top of a radiator btw.