>>770973
And now it's gone. Government doesn't want us to see this stuff

>>771167
spooky

>>770973
:(

>>770973
Get video back you welp

>this has energy efficency of 70%
>can be used when the difference in water level is as low as 50cm

https://www.youtube.com/watch?v=VTcQEyK9hsA

>>771250
What makes it spin

https://www.youtube.com/watch?v=A1mZkdu7uYs

>>771254
The turbulent nature of the vortices that form as whirlpools

>>771327
English please

>>771330
well judging by the video he posted I think it's more complicated. But essentially turbulence is unpredictable and cannot be modelled by any mathematical equations, it can only be approximated. So as the water goes down the ledge it's forming whirlpools as the water goes off in random directions. These whirlpools are not uniform, so they will spin the metal rod one way or the other

sorry had to fix it, here is the new link

https://www.youtube.com/watch?v=H-L_bvoiefI

>>771334
Can i have like 5 of these in my backyard?

>>770973
>>>/diy/

Also advertising your youtube isn't allowed

>>>/diy/996070

>>771250
That vortex principle seems to be the way to go, I would like to try a prototype of that.

>>771334
Looks like Bernoulli to me.