Overheating -- Corrective measure questions.

@RustyRatRod Call me ignorant, but it seems with the curve of the tip of the blade pointing to the radiation as this particular fan is, and its rotation, how does it move more air. It seems to me that the air would be allowed to fall off the curved section of the tip, vs being "cupped" if it was used the other direction. Maybe wrong, but I picture it like a prop on a boat engine (work mindset), far more thrust in forward where the cup is scooping the water vs in reverse and using the back side of the blade. Just trying to educate myself, I apparently am seeing it incorrectly somewhere.