Upgrade mechanical fan vs installing electric fan

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Jimacuda said

Thats on a fixed pitch fan blade, correct?
Doesnt seem to account for the non clutch type fan blade flattening out substantially at rpm.

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Yes. The numbers are for the same fan, not a different pitch. I agree that the blades would actually flex a bit and flatten their pitch a small amount at higher rpm, not substantially or you would see blades fatigue, break, and fly off frequently.