<VV> fanz

[Larry Forman]

As I recall, Tom said the fan current is a relatively constant 20 amps at 
12 volts, so it is considerably less than kilowatts, more like 240 watts or 
slightly more if the voltage is closer to 14.6 volts.  I seem to recall one 
horsepower is 746 watts, so it is less than one horsepower, even accounting 
for the inefficiencies of the alternator.  Tom said he sold some systems at 
Portland, so I hope that some of his customers will run them and provide 
objective performance reviews to FINALLY settle these discussions of 
whether or not these really do work, beyond Tom's two cars currently 
running with electric fans.

Personally, I am pretty well convinced.

Larry


At 09:15 AM 8/1/2005 -0400, Padgett wrote:
> > YES IT WORKS! YES we drove the car with the kit there in Portland YES we
>> > drive it in 100+ temps.
>
>ref: http://members.aol.com/redhoss1957/efan.jpg
>
>Picture looks like a 12 or 14 blade 18" fan and and *might* be able to 
>flow enough air. Cannot tell precisely which but the alternator has 
>evidently been upgraded, possibly to a modern 105 or 120 amp unit. Not 
>sure what the trade in load would be but the no-loss conversion is 756 
>watts per HP so even at a 50% loss 4 hp would give  1492 watts or 124 amps 
>at 12v.
>
>As a ROM on the energy budget using textbook numbers it looks doable which 
>is probably why so many have tried.
>
>To reduce cruise load I would probably use a two stage fan running at half 
>speed (wired in series) up to some temperature and full speed (wired in 
>parallel) above.
>
>Padgett