[Public-List] Yamar 2cyl 15hp

[Bill Wallace]

The resistance to spin goes up as more current is taken from the alternator.  There is a small amount of friction and other losses, but otherwise it is quite easy to spin the alternator with no current draw.

Bill.


________________________________
 From: Jeffrey <alberg30nh at gmail.com>
To: Alberg 30 Public List -- open to all <public-list at lists.alberg30.org> 
Sent: Thursday, March 15, 2012 10:05:00 AM
Subject: Re: [Public-List] Yamar 2cyl 15hp
 
I don't understand how this could be? The alternator is spinning regardless
of ignition state or current draw..and the resistance to spin the shaft is
the same..I think.

-jeff


Jeff Fongemie
#116 Seagrass

http://picasaweb.google.com/fongemie








On Thu, Mar 15, 2012 at 8:59 AM, Mike Lehman <sail_505 at hotmail.com> wrote:

> I recently went to a seminar on marine electric systems and learned
> something that was quite interesting...if you have a diesel and the engine
> is in the process of charging the battery, it can take a significant amount
> of HP to run the alternator, depending on the size of the alternator and
> the state of charge on the batteries. But it you need the extra HP to go
> through an inlet, or bridge, or fight some strong current, you can turn of
> the ignition switch, which will turn off the tach and the alternator and
> give you the extra power you may need. The engine will continue to run, but
> you will not be charging your batteries. I have never tried this, and am a
> bit scared to do so. Has anyone ever tried this?
>
> -----Original Message----- From: Joseph Balderson
> Sent: Monday, March 12, 2012 10:01 PM
> To: Public-List at lists.alberg30.org
> Subject: [Public-List] Yamar 2cyl 15hp
>
>
> Has anyone repowered  an A-30 with a Y2 15hp Yamar?
> Baldy3
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> --
> Jeffrey Fongemie
>
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