But isn;t that just gelcoat delam. Cosmetic, and it occurs by osmotic
pressure on parts of the hull submerged in salt water?

On Wed, 23 Mar 2005 23:07:09 -0400, Dave
wrote:

Ummm.............. I must respectively differ..

My company also does some marine surveying, ( inspecting
pleasure boats in insuring and pre-buy situations).

Ans , yes, I have seen many examples of this "delamination" of
composiets...

....many cause factors, osmosis being the most common, poor
quality control/contamination during layup are others....

Dave

On Wed, 23 Mar 2005 03:02:04 +0000 (UTC),
(Paul Tomblin) wrote:

In a previous article, "Montblack" said:
I read that composites don't show cracks, instead they have weak 'air
pocket' spots that can't be seen during inspections. These pockets of air
bubles(?) are caused by heat/cold to the composite structures over time.

My father, who was the Chief of Non-Metallic Materials at deHavilland
Canada said that this is bunk. Once the composite is made and given the
initial inspection, there is no way in hell they could delaminate like
that.