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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xj-s] electric fan -windmill
I was wondering what happens when an electric cooling fan (aftermarket installation) freewheels. For example at 60 mph, that fan will be spinning pretty furiously because of the air flowing past it, even though it may not be electrically powered at that moment. As a mechanical engineer I'm off home turf, but nevertheless at the risk of sounding ludicrously ignorant in front of the entire list I would like to ask this question: would the fan act as a generator? Or, would it create any kind of electrical surge in the car's elecrical system? To go further, a) what happens when the fan is not powered but spinning fast and THEN it is switched on by the thermostat control? b) If the fan can't freewheel easily because it is acting like a generator (windings are creating resistance to rotation) then wouldn't it act as an impediment to freeflow of the air thru the radiator? Julian Mullaney Follow-Ups:
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