Another update on Wild’s slow rehabilitation.
After the keel finally came off, we were able to figure out the structure of how it is attached to the boat. It would have been nice to know in advance! I, for one, found it surprising. Never would have guessed how it is put together.
In general:
And more specifically:
There is a carbon fiber tube that stands on the bottom of the sump and apparently bears the weight of the keel and the compression of the nut. Although as we found out, it is all pretty well glued together with epoxy (which may actually be vinyl ester, but… some kind of polymer.)
I would have thought there would be a strong fiberglass layup right under the nut to sort of act as an “upper bearing.” But there is only a thin skin.
The whole thing is held in place with a filling of “Syntactic foam.” WTH is “syntactic foam” you ask? I had to look it up too. It’s a slurry of microballoons in resin.
Unfortunately, it turns out that all that effort to wrestle the keel off was not a waste of time.
Bolt #1 has large cracks, apparently from the collision, AND corrosion pitting.
BTW, there’s a little easter egg: “42” and “7160” (weight of the keel in pounds) are stamped into the top of the lead, where you will never see them unless you have to go through all of this.
Bolt #5 also has corrosion pitting. This seems surprising since there has never been any hint of leakage and the joint appeared to be rock solid before we broke into it.
And even though I told them not to, and their boss told them not to, the yard guys got in there with a sawzall and notched the bolts.
Dye penetration test:
Moral of the story: If you’ve had a hard grounding and didn’t drop the keel (Hey, it looked OK!) there may be a nasty surprise down inside there. Or even if you didn’t hit anything.