[Public-List] Garboard Drain

[Mike Lehman via Public-List]

The original specifications were for lead ballast, but due to the high cost 
of lead, Whitby use iron from the beginning. The early boats were 
under-ballasted and additional weight was added later.




~~~_/)_/)~~ Mike Lehman ~~_/)~~~


-----Original Message----- 
From: Michael Connolly via Public-List
Sent: Monday, November 24, 2014 7:11 PM
To: Greg Bover ; Alberg 30 Public List -- open to all
Subject: Re: [Public-List] Garboard Drain

Does anyone know when Whitby changed from lead ballast to iron?  Or perhaps 
the story was that Carl Alberg specified lead and Whitby decided to use 
iron?

Greg, since the iron "pig" is not necessarily isolated from bilge water 
intrusion I would hesitate to use rock salt to prevent freezing.  I use RV 
antifreeze which I believe is much less reactive than chloride and iron. The 
chlorine ion which is present in an aqueous solution of rock salt is very 
reactive with iron, causing exfoliation of the iron and eventual expansion 
of the pig, to a far greater extent than any pure which might seep into 
cavity around the pig. Just a heads-up.    Michael

----- Original Message -----

From: "Greg Bover via Public-List" <public-list at lists.alberg30.org>
To: "A-30 List" <public-list at lists.alberg30.org>
Sent: Monday, November 24, 2014 3:52:43 PM
Subject: [Public-List] Garboard Drain

I love the rare earth magnet trick, but rather than put yet another hole in
the boat, I put rock salt in the bilge so that any fresh water that gets
through the winter cover and into the bilge does not freeze. Since I have a
solar panel outside the cover, the batteries are still aboard and the
automatic bilge pump keeps the level very low.


Greg Bover
A-30 #114
PENSIVE
Gloucester


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