[Public-List] Bend in the hull

[George Dinwiddie]

Stephen,

You'll notice that the chainplate knees are attached to the inside of 
those dimples.  There is some space between the tops of those knees and 
the underside of the deck.  This allows the knees to rotate in, 
slightly, until the knee hits the underside of the deck.

On most boats the dimple is barely noticeable unless the light is 
reflecting off of it, as the gap above the knee is less than 1/4".  If 
it's much greater than this, I think I would push a wedge in between the 
knee and the deck to give the rigging less mechanical advantage as it 
tries to tear the knee off the inside of the hull.

  - George

On 10/11/11 5:02 PM, Stephen Gwyn wrote:
> Hi,
>
> I've noticed that my hull has a slight concavity in the topsides, just
> below the forward lower shrouds. I've put two pictures up at:
> http://astrowww.phys.uvic.ca/~gwyn/pers/sailing/bend/index1.html (and
> yes the cove stripe needs repainting) I'm assuming it's due to the
> forward lowers pulling up on the fibre glass knee. I think I can just
> barely see the same on the pictures recently posted by George Mathis at:
> http://alberg-boats.com/A30/439/09242011HomePort.jpg
>
> Over 37 years, it's deflected by a 1/4 inch, so I'm only slightly worried.
>
> Should I worry more?
> Has anybody else noticed the same thing?
> Should I do anything about it?

-- 
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   When I remember bygone days                         George Dinwiddie
   I think how evening follows morn;            gdinwiddie at alberg30.org
   So many I loved were not yet dead,           http://www.Alberg30.org
   So many I love were not yet born.                          also see:
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