Originally Posted by CarlF
I'm still trying to understand the picture. It appears to show three broken bolts (two forward and one aft) and a center 18"x6" (?) section of laminate pulled entirely out such that we are looking at water
in the middle of the keel
And an outer layer of laminate from the starboard hull
was also peeled off?
Do we know how many bolts are in a 40.7? Are they just a single
line down the middle?
If three bolts broke (or had previously broken), the remaining attachment would have been under incredible stress.
During progressive collapse of the bolts, at some point the force on the remaining bolts would have also become too great for the fiberglass
. Looking at the photo
it looks as though the central bolts partially ripped out of the hull
consequently taking a large section of hull with it - effectively pealing off the laminate that remained attached to the bolts as the hull rolled.
Speculation again, but I would contend that this was the result of prior damage to the vessel. A major forward impact would cause enough distortion of the caulking to permit
inflow/seepage over time to corrode the bolts without it being evident in the bilge
. The stresses from large seas and moments would have opened up the volume between the hull and keel
to the point that movement was possible. The only thing that could have slowed it would have been to drop all sail, motor
to maintain steerage, bail and call for assistance.
The poor guys would have been fighting a losing battle.
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