[PUP] Arild and the design build "thing"

[Jim Leishman]

Our experience with big alternators is that they are far less efficient
than an AC generator. We believe that that an alternator may take as
much as three times the power (fuel) to produce electricity than a
generator.

Alternators are great for light loads but if real wattage is needed to
drive air conditioners, water makers, etc - you may be burning more fuel
with high out put alternators running off your main than if you ran a
stand alone generator.

Do you know what the efficiency rating is on the alternators used?

Jim Leishman

-----Original Message-----
From: passagemaking-under-power-bounces at lists.samurai.com
[mailto:passagemaking-under-power-bounces at lists.samurai.com] On Behalf
Of Alan
Sent: Friday, August 03, 2007 10:19 AM
To: Passagemaking Under Power List
Subject: Re: [PUP] Arild and the design build "thing"

Dave,

Why such a big alternator if you only use it to put out 175 amps?  Is
that
purely for the sake of theoperating temperature of the alternator or for
a
differentreason?

How did you select Electrodyne over Balmar . . . . and why a Balmar
regulator instead of one by electrodyne (which I assumethey do make).  I
had
always assumed that you match alternator to regulator from the asame
manufacturer.

Alan Wagner
Tampa, but building in Halifax

----- Original Message -----
From: "Dave Cooper" <swansong at gmn-usa.com>
To: "'Passagemaking Under Power List'"
<passagemaking-under-power at lists.samurai.com>
Sent: Friday, August 03, 2007 11:54 AM
Subject: Re: [PUP] Arild and the design build "thing"

> "Big Red" is a 275 amp 28 volt Electrodyne alternator belted to the
main
> engine with two Gates Predator belts. We limit the alternator to 175
amps
> (5kw) with the Balmar 624 regulator and it runs cool (140-150 F) and
the
> belts are holding up fine.
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