You want to see something weird how about a hydraulic powered off the power steering pum fan that is electronicly controlled. 
That's what they run on a lot of the 1Jz powered Supras and on the Crisidas in Japan. It moves some SERIOUS air. The second it's cooled it goes off just like an electric. Very neat but over complicated.
hey, that's just how the fan on my 98 Thomus bus works!
