I made this because i saw a video of the company Turbulent, and i made a scale model of it, its not exactly a copy but my 3d drawing is not 100% yet.
i tried 3 types of turbine blade but the proppelor with the biggest pitch works the best as you can see in the video on youtube.
iit was quit hard to remove the support between the blades but you have to put as litle support in as posible.
i first cut in with a dremmel disc and removed the last with a small chissel.
the pump is a 6 watt brand micra and the diameterof the pump outlet is 13mm
i used a m3 bold of 30mm long