Would someone please tell me how an electric fan pulls power away from the
engine???
Sure it requires power to run, but that alternator is running all the time
anyway. The electricity is coming from the battery and
being replenished by the alternator. The only effect that running an electric
fan has on the engine (as far as I can see) is that a
large power drain might steal some power from the ignition system.
I'm all ears!!!
Joe Curry
Randall Young wrote:
>
> 10 amps at 12 volts (which is a 'typical' figure I just made up), is
> only 120 watts, which is only about 1/6 horsepower. Even if your
> alternator is only 50% efficient, it still draws only 1/3 horsepower to
> turn the fan, when it is running.
>
> It would be nice to know at what rpm (and under what conditions) JK
> Jackson's oft-quoted figure was taken at. But, even if the mechanical
> fan only draws half that much, that's still 3.7 'free' horsepower.
>
> Randall
> 59 TR3A daily driver - electric fan and loving it
>
> "Biedermann, Frank (SSABSA)" wrote:
> >
> > but have you considered the extra power required by the alternator to
> > generate
> > the electricity to power the electric fan? And that conversion from
> > mechanical
> > to electrical energy and then back again isn't exactly lossless either...
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