[Public-List] Alternators...

[Gordon Laco]

Well that’s all quite logical… but the missing ingredient is the output by the alternator at various rpm.

Gordon Laco
www.gordonlaco.com




> On Jul 16, 2018, at 5:21 PM, Anders Bro via Public-List <public-list at lists.alberg30.org> wrote:
> 
> 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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>> 
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