DAM! Thanks for posting that Allex.
That makes my fan cooling setup look like a gentle breeze!
I work in I.T., and have worked with (and right next to
) a whole bunch of servers over the years. While their fans can and do push a lot of air, not only are they extremely LOUD, but they also have a really annoying pitch/whine to them.
I think those kind of fan cooling setups would only work well for riding in a noisy city with traffic or at high speeds on the highway where other noises drown out the fan noise. They would completely ruin the ambience of the outdoors if you used them in the forest or bush.
No doubt the cold Russian air really helps these setups work well also!
Seeing these setups really validates my suspicions about fan cooling having the highest potential cooling capability. Don't get me wrong, I still love FF and hubsinks...I have a set + 50ml of FF ready to go for my next build...but the FF + hunbsink combo has a thermal dissipation limit that is not too hard to reach if you really start pushing things. This is less the case with fan cooling...if things start getting too hot, just push more air through.
I've tried it with limited success, but I still think the absolute best cooling is a combination of all 3. FF + Hubsinks + fan cooling. If the windings could be better protected without reducing the thermal conduction to the FF and air, this combination would be the best by far. I'm actually still running my Leaf motor like this currently, but I fully expect the FF to be contaminated and the windings to be very dirty when I finally get around to opening it up.