Water Vortex / How you can build a water vortex / Physics of a vortex

In this video I build a water vortex. The vortex is created by means of a brushless motor. The drive shaft is sealed by a very easy to build waterproof bearing. I have tested different Probeller to see what vortex they produce. The vortex is strong enough to pull a Syropor ball down. I show the physical principle of a vortex. Watching a vortex can be a very exciting thing.
You can download the 3D printed parts on Thingiverse.
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