[Alberg30] Knee hull separation

[Alfredo]

Thanks to all that replied.
 I was in the process of increasing the bolt size on the chainplates
when I noticed the separation.
I really didn’t need another project before departing for Bermuda but
this is the type of stuff that could make or break the whole trip.

Thanks again to all. And, if anyone that has already done similar work
happens to come across a picture of his or her project, I would
appreciate seeing it.

Alfredo

--- quest433 at msn.com wrote:
> On the Chesapeake it was fairly common to have to redo the forward
> lower shroud attachments on the newer boats because of bond failure. 
> It was evident after looking at the way the attachments were failing
> that they where under designed and needed to be enlarged to better
> carry the loads.  On Quest the knees were remade--the overall length
> was increased maybe 3 or 4 inches and very carefully glassed in. 
> Whitby didn't use alot of glass, if I remember right there may have
> only been a single laminate of that heavy roven stuff.  The corners
> weren't filled ...it was just a minimal job.  It's an easy fix.  If
> your going off shore I'd beef 'em up just to show some respect to
> Neptune.  While your horsing around with the forward lowers you ought
> to consider increasing the attachment hardware to 5/16" bolts.  Use
> bolts with the correct grip length as opposed to full threads.  The
> 1/4" full threads bolts used by Whitby cause a "sawing" action that
> slots the holes which can lead to snap loading which will only hasten
> failure.  I borrowed a right angle drill from work and was able to
> redrill without taking everything out.   
> 
> Jim Mennucci
> 
> ----- Original Message -----
> From: Christos Katehis
> Sent: Thursday, May 15, 2003 2:15 PM
> To: Alberg 30 public list
> Subject: Re: [Alberg30] Knee hull separation
> 
> Could it be that A30's that have been used extensively in racing or
> ocean
> sailing ( excessive rigging tension ) have 2 problems in common, 1)
> the mast
> beam and 2) the forward lower knee / hull bond?
> 
> I know of one "knee / hull bonding" repair on an A30.  It included
> the knee
> to be completely re-done and adding 24 inches to the length of the
> new knee.
> 
> The new knee goes through the shelf and bunk plywood. It is glassed
> all the
> way.
> 
> Something that I plan on doing before my Atlantic crossing in 2004.
> 
> Christos
> Kasia #383
> 
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