Dremel High Performance Fan/Propeller

This is my first time modeling a axial fan, but it turned out pretty well. Designed for the Dremel 7760 (Dremel Lite). It has enough thrust to feel like the Dremel is about to fly when you flip it upside down, and I'm sure on more powerful Dremel models that are compatible, it would have even more CFM and velocity. The 2 blade version moves slightly less air than the 3 bladed version but it is such a small difference that it doesn't matter much. To install, slide the propeller over an empty chuck/collet on the Dremel. Just make sure your Dremel spins counter-clockwise when you look at it from the top, or else the propeller might fly off and not work as efficiently. Is this practical for anything? I don't know. Is it fun? For me, yeah, As long as you don't stick your fingers or something in the blade.