Graham's description is pretty much what I saw on one of two Corvettes I looked at closely. IIRC the corvette has one chainplate attached to a bulkhead, another to a "hanging knee". In one case (the boat where the hull distortion was pronounced) The hanging knee's glass tabbing was fractured. this is really not a huge repair for a handy person, and the owner had the work done for a reasonable price after we first went over the boat together. Hinterholler was quite thoughtful, and cored these boats with plywood that used what I think was resorcinol glue. which leeches purple fluid when the wood is wet. Easy to see where the water has entered. These repairs do not fix the hull buckling/DIMPLES but the boat would probably be improved structurally with a careful DIY repair.. I started looking for this problem after that, and I think you'd be surprised how many old boats suffer this affliction and how badly distorted some are.
Since we're talking about this...the other corvette - I'll name this one - "Egret" was, sadly, a real mess, much of the interior rotten, including those knees. The owner was an elderly guy and neglect had claimed the boat, I think I could have gotten it for nothing which would not have been a great deal. He reached out a few times asking for an offer - any offer - and thankfully I resisted the impulse. I wrote him a detailed survey explaining exactly what I thought was needed to be repair the boat, which was to replace 75% of the interior, bulkheads, etc. (I had poked my finger through a few, and I bet in an afternoon with a grinder and zip disc I could have had it to a mostly bare shell. This would have been easier than patching what was still intact. He lost that document and requested it months later for some other buyer. It would not surprise me if it is in the hands of a list member. Pretty little boats, I hope someone has restored Egret - a pleasant winter's work for someone with the time. Dave --------- Forwarded message ---------- From: Graham Young <grahamyoung...@sbcglobal.net> To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com> Cc: Date: Mon, 28 Nov 2016 14:15:28 +0000 (UTC) Subject: An over-tensioned rig and/or weak laminate is also one of the explanations that Don Casey gives for dimples near the chain plates in his book on inspecting old boats. He also points out that "hard spots" may result from the hull flexing over an internal structure like a bulkhead. This may be cosmetic, but apparently the concern would be whether the glass is fractured and the hull weakened. He also recommends standing astern to see if the hull (and rudder/keel) are fair and true as they can distort over time for a variety of reasons including how they are blocked in the yard. These are not issue unique to C&C's, but potentially could afflict most any boat. Graham Spellbound Cleveland, O.
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