Re: Math wiz's calculating hp.

["Wing Gee" <winggee@hotmail.com>]

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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