[Public-List] Chainplates

[David Van Denburgh via Public-List]

Was the chainplate knee rotted, or did the bolts shear?

David
________________________________________
From: Public-List <public-list-bounces at lists.alberg30.org> on behalf of Jonathan Bresler via Public-List <public-list at lists.alberg30.org>
Sent: Sunday, November 1, 2015 6:41 PM
To: Alberg 30 Public List -- open to all; Gordon Laco
Subject: Re: [Public-List] Chainplates

The first occassion that comes to mind is that on TC Williams' Argo #247,
the chainplate pulled through the deck during the first day of the 2012
Rankin Regatta.

Jonathan
On Nov 1, 2015 6:33 PM, "Gordon Laco via Public-List" <
public-list at lists.alberg30.org> wrote:

> Have there been any failures of these bolts besides the one Yves Gelinas
> experienced in the Southern Ocean?
>
> Gord #426 Surprise
> (just back from the 2015 Misery Trip, not quite Southern Ocean but a good
> facsimile...we made it back OK, broke nothing, nobody got hurt... My wife
> is
> annoyed with me for doing it... )
>
>
> On 2015-11-01, 6:10 PM, "Wes Gardner via Public-List"
> <public-list at lists.alberg30.org> wrote:
>
> > My mistake! You know I kept looking at my chainplate bolts and in my mind
> > thinking "yup, those were upgraded to 5/16" because they were new and
> > shiny....seems when I put the 7/16 wrench on the head of one, I realized
> it's
> > just a 1/4-20. Yeah, they are shoulder bolts (I believe I read that the
> > originals were 1/4-20 but with thread the whole way), so they were
> replaced,
> > but not upgraded to 5/16. Furthermore, they set the bolts with the nut
> on the
> > chainplate end allowing the chainplate itself to bear on the threaded
> part of
> > the bolt before the shoulder started....geez, at least turn the bolt
> around.
> > My understanding is that most of these failure issues have been in shear,
> > right?
> >
> > And when I looked really close, the bolts for the uppers are stretched a
> > little bit.....hmmm
> >
> > I was going to bed the actual chainplate, where it contacts the knee, in
> 5200
> > as it will never need to be removed from the boat again. However, I'm
> going to
> > bed and seal the chainplate covers (mine has Shaefer cover plates) in
> 4200.
> >
> > I'm also going to change out the backstay bolts as well.
> >
> > Can anyone add any helpful hints or "gotchas" specific to the Alberg 30?
> >
> > Wes
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