[Public-List] Alternators...

[Anders Bro]

Yes, so multiply that rpm by the pulley ratio to come up with alternator
rpm, and make your own plot of output vs engine rpm?

On Mon, Jul 16, 2018, 4:57 PM Gordon Laco via Public-List <
public-list at lists.alberg30.org> wrote:

> True, but it’s the engine that has the RPM instrument…
>
> Gordon Laco
> www.gordonlaco.com
> #426 Surprise
>
>
>
> > On Jul 16, 2018, at 4:53 PM, Anders Bro via Public-List <
> public-list at lists.alberg30.org> wrote:
> >
> > Ya, but isn't that alternator rpm and not engine speed? Usually the
> pulleys
> > are sized to have alternator rpm higher than engine rpm.
> > Anders
> >
> > On Jul 16, 2018 4:39 PM, "Gordon Laco via Public-List" <
> > public-list at lists.alberg30.org> wrote:
> >
> > Hello friends…
> >
> > Do any of you have data on what the output curve of our Atomic IV’s
> > alternators will put out at various RPM’s?
> >
> > I’m looking at Moyer’s modern alternators, and noticed that they give
> > output figures for ‘normal operating speed of 2000rpm’.  Well even with
> the
> > boosted rpm our Campbell prop allows, we still don’t get more than 1500
> > going flat out… we cruise quietly at 1200.
> >
> > I understand our factory supplied alternators are ’30 amp’ but what is it
> > really delivering at real operational rpms?
> >
> > I understand that at lower rpm’s the alternator isn’t ‘excited’ so
> delivers
> > little amperage…But I don’t know what the critical rpm rate is to achieve
> > excitement
> >
> > I don’t understand this whole subject as well as I’d like to.
> >
> > Gordon Laco
> > #426 Surprise
> >
> >
> >
> >
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