Run electric fans all the time?

Interesting information on fan dynamics, thanks. My background is EE, not ME (or aeronautical engineering) :rolleyes:
Don't airplane propellers windmill even when feathered, though?

Anyway that was my concern - that the Contour fan would not windmill when off, which was confirmed above. But if that actually helps airflow, then they should stay off at speed!

I installed a high-flow thermostat with no change. Probably time for a modern aluminum radiator ;)