That looks like it could have resulted from the combined effect of loose bolts AND a grounding event. I definitely think it needs additional attention.
I would do the "normal" repair. Tighten/check tight the keel bolts, excavate, fill, glass(maybe), fair. Have you had a chance to investigate for water ingress around any of the bolts? Can you or has anybody done a structural inspection? What happens during a grounding is that when going forward the keel acts as a lever arm and crushes into the hull at the trailing edge of the keel. Compression damage to both the hull and keel may be evident in this area. Some people suggest to use the flexible material to fill the gap because the keel is likely to flex when heel over, is that a perception or a fact? Original construction used a layer of 5200, 4200, or butyl tape on the joint. The joint was then faired with a low density fairing compound. Often times what owners see is years of bottom paint and the fairing material chipping out in a straight line that extends from leading edge to trailing edge on both sides. This is a typical smile. Sometimes it is natural and unavoidable cantilever flexing. Sometimes it is loose-ish bolts that allow for the cantilever flex. Yes, instead of a low density fairing compound a tougher material is in order. Notice I didn't say stronger or harder. Toughness is the opposite of brittle. IMO the west systems G-Flex line of products fits this description. If I was in need of dropping the keel I would probably still use 5200 to seal the joint but then simply fill with G-Flex as described in the article that I linked previously. Also, do you need to raise the mast to tighten the bolt? I am under the impression that one bolt is hidden under the mast. I had 2 bolts under the foot of my mast (C&C 37+). You should probably expect at least one. You may be able to engineer a mechanism for tightening the bolt without pulling the mast but ultimately I think you will spend more time and money. Just coordinate with the yard to use their travel lift to haul and block the boat in preparation for the repairs. Make sure that they can reach the mast with their crane. Once the lift sets the boat on the keel arrange for the crane to lift the mast. It doesn't have to be removed - just lifted a foot or two. Of course there are lots of maintenance items that you could coordinate during a complete mast removal. My yard is saying I need to do all this in travel lift, is this necessary? Yes, the weight of the boat should be compressing the joint while tightening the bolts. Some listers have argued that the amount of tension created by a single bolt at the correct torque exceeds the weight of the keel many times over. I say, if you need to get to the bolt under the mast anyway and you need to fill and fair and paint the keel anyway then you need the travel lift. If you wanted to experiment or practice on the accessible bolts while the boat was in the water then it is unlikely that you would harm anything. Preparation is going to be the key to an expeditious repair. There are lots of tools and correct sized sockets needed as well as a yard that has the ability and willingness to coordinate with you for the use of their equipment. I haven't even touched on the tools, equipment, and consumables needed for the fill, fair, and paint. Keep the questions coming. Good luck, Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Sun, Jun 23, 2019, 9:12 AM General Gao via CnC-List < cnc-list@cnc-list.com> wrote: > It turns out my email last night was rejected due to size. Here is the > link to the picture of "my smile"... > > > https://drive.google.com/file/d/0B4sBNcSIFFFGYkRPU1IxNFdSbHhEUUFoZjZnVVZOSV9mMlM4/view?usp=sharing > > Thank you guys for sharing the information. It is very much appreciated. > My email last night had two questions: > > Some people suggest to use the flexible material to fill the gap because > the keel is likely to flex when heel over, is that a perception or a fact? > > Also, do you need to raise the mast to tighten the bolt? I am under the > impression that one bolt is hidden under the mast. > > Seems to have been answered by you already. > > My yard is saying I need to do all this in travel lift, is this necessary? > > Thank you again! > > On Sun, Jun 23, 2019 at 6:19 AM dwight veinot via CnC-List < > cnc-list@cnc-list.com> wrote: > >> I have a 35 MKII and i repaired the smile on my boat pretty much the same >> way as Dennis described. However i only repaired the forward end of the >> smile back for about 2 feet on each side. I did that 1 full year ago so the >> boat has experienced only one winter of freeze/thaw cycles here in Nova >> Scotia and a full season of sailing. No smile any longer on the boat but a >> big smile on my face...mission accomplished >> >> On Sun, Jun 23, 2019 at 1:02 AM Josh Muckley via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >>> I wanted to share this article with you in my previous email but forgot. >>> >>> >>> https://drive.google.com/file/d/0B8pEh5lnvP1yV1JEN3YxQk1RbHc/view?usp=drivesdk >>> >>> Josh Muckley >>> S /V Sea Hawk >>> 1989 C&C 37 + >>> Solomons, MD >>> >>> >>> >>> On Sat, Jun 22, 2019, 9:51 PM General Gao via CnC-List < >>> cnc-list@cnc-list.com> wrote: >>> >>>> Hi, >>>> >>>> I am a new C&C 35 Mk2 owner, and I am a new owner of a sailboat in >>>> general. The yard is telling me the "smile" on my boat is a bit excessive. >>>> Sailors on the Sailnet suggested me to post my question on here to get more >>>> accurate suggestions. So here I am. >>>> >>>> Some people suggest me to tighten the bolt, or even drop the keel to >>>> fix it for the long term; some suggested it is just appearance and no >>>> structural concern, and "filling" or "patching" the smile is part of >>>> regular annual maintenance for this boat. >>>> >>>> I am seeking advice from people with experience on this model or >>>> similar C&C boat in construction (solid FG hull and swing back keel). >>>> >>>> What would you recommend? >>>> >>>> Thank you in advance. >>>> >>>> Bo >>>> _______________________________________________ >>>> >>>> Thanks everyone for supporting this list with your contributions. Each >>>> and every one is greatly appreciated. If you want to support the list - >>>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>>> >>>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> -- >> Sent from Gmail Mobile >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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