[Public-list] depression in hull

[Gordon Laco]

Hi there- 

Surprise has them too... I think that they were built into our boats, which
as I have observed before were very well built - but not particularly finely
built.  They exist because the solid glass hull is actually quite flexible
(particularly in contrast to the cored deck and thick plywood bulkheads
which are stiff) and if there were any variance in accuracy in the
fabrication of the deck and bulkhead cutting - the hull has to pull in where
the rigidity didn't allow 'make-up' to occur elsewhere.

I could not see the irregularities until I had her painted dark blue.  Then
I could see the depressions in the area of the chainplates, and then only
from particular angles.

I wouldn't worry about them; such things are just part of what the A30 is.

Cheers - Gord #426 






> While working on Putachieside (#496) recently I noticed a depression in the
> hull mid-ships near the chain plates. The depression (indentation) seemed to
> be greater on the starboard side than the port. Last year I did a major
> refit that included increasing the size of the chain plate bolts as
> described in previous postings on this site. During the refit I did not
> notice the indentations which are located at the hull / deck joint. I am
> concerned that perhaps the mast compression beam and / or the bulkhead have
> weakened thus causing the hull to flex in this area and collapse slightly. I
> have checked the maintenance guides and cannot find any direct comments on
> this phenomenon. If anyone has had a similar experience with this issue I
> would appreciate your comments / solutions.
> 
> Cheers
> Brian
> 
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