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Core Sound 20 Mk. 3 #22 - Essex Fells, NJ

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Was inspired by the WaterTribe Ultra Marathon to make some progress here.  


Mostly finished now with several bench projects, including tiller + rudder assembly, centerboard, and locker tops and coamings.  Also got the hull panels fully assembled, wired together, and did the unfolding ritual last night; now my pile of wood is vaguely boat shaped.  Unfolding was exciting due to my failure to account for the height of hanging light fixtures in the shop, which meant some ladder work in the middle of the process.


Time-lapse video of my unfolding adventure here.










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Am getting ready to fillet and glass the keel, and have a quick question for those that have gone before.


At this point, the keel and chines are wired together, but the inside and outside of the hull are bare wood.  BH1 and BH2 are coated/sealed with epoxy and sanded, ready for fillets or paint.  The way I read the instructions, you dry-fit BH1 and BH2 to make the hull take its proper shape, then you fillet and glass the keep tip to transom with BH1 and BH2 in there (so it keeps the shape), and then a step or two later you fillet and glass the joints between BH1 and BH2 and the hull.


My question is, if I fillet and glass the keel with BH1 and BH2 poking into the bottom of it, there will be (or, will there be?) bare wood spots where the bottom edge of either BH is touching the hull (or touching the stringers), and I won't be able to get epoxy in there later because it will be stuck in place because the bottom corner is now a part of the bow / keel fillets?  


Should I first paint a coat or two of neat epoxy up the lines on the hull where the bulkheads will go, and let that cure, before I stick the bulkheads back in and make the keel fillet? Something else? Or is this just not an actual problem in practice?


I saw some build logs from others who first did the fillets without installing the bulkheads, this seems like another option but then I'd have to cut off the bottom tips of the bulkheads.

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When I did mine, I just wet the edge of the bulkhead with epoxy and then filleted them after. And there were times I didn't even do this. You are going to glass tape these joints essentially sealing them good from the elements. 


BTW, looking good!

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If you are happy with the shape of your hull; then I would recommend not removing the bulkheads. 


Prior to filleting, if you wet the area with unthickened epoxy, it will wick into those plywood edges that you are concerned about anyway.  Even if epoxy doesn't wick completely into those edges, it still isn't an issue since (as Steve pointed out), those edges will be effectively isolated from moisture.

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Have made some progress in the last few weeks. Glassed the keel (inside), broke and then fixed my hanging knees, made several other errors and recovered, attached the transom, framed out the centerboard trunk and coated the inside with an epoxy / graphite mixture so it will hopefully have less friction with the CB.  Also have attached approximately 800 cleats to the top of interior members, almost ready to dry-fit the inside components of the boat.



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