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Re: Math wiz's calculating hp.



Just curious then, why do people make such big altenators then if their only
going to be drawing about 20 amps or so. aren't the corrados like 110a or
something.

----- Original Message -----
From: "Toby Reed" <toby@eskimo.com>
To: "Wing Gee" <winggee@hotmail.com>
Sent: Wednesday, September 06, 2000 1:36 PM
Subject: Re: Math wiz's calculating hp.


>
> Wing, you got it. But remember the alternator is almost never making 65
> amps of current, so the actual drain is a lot less. I'd say driving around
> town, you're only drawing about 5 or 10 amps out of the alternator.
> Headlights, stereo, fan blowing and things go up to 20 or 30 amps.
> -Rarely- will you see the max capacity of your alternator....
>
> Mechanically the alternator gets harder to turn when its making more
> current, so you're drawing a lot less HP than 1.21 ! Probably closer to
> one sixth of one horsepower.
>
> If you wanted to know more exact values, you could hook up an ammeter in
> line with your alternator and get some data on the efficiency of the
> alternator from the company that made it.
>
> -Toby
>
> On Wed, 6 Sep 2000, Wing Gee wrote:
>
> > For all you math people. See if i did this right. I'm converting power
> > to hp. now i know P=I*V. Let me tell you what i'm doing first. I wanna
> > see how much hp the altenator is dragging while it's charging. Now i
> > know I=65a and V=~14v(it charges around there) Which is then multipled
> > to get 910Watts=P. Now 1hp=746watts. now when i divide that. i get
> > 1.22Hp. so my 65amp altenator is sucking up about 1.21Hp. To me that
> > seems about right.
> >
> > Wing
> >
>
>

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