sailinghigh 0 Posted May 26, 2014 Share Posted May 26, 2014 US Navy finds wreck of missing yacht Cheeki Rafiki Saturday 24 May 2014 "The US coast guard has confirmed the life raft aboard the capsized sailing vessel Cheeki Rafiki was secured in its storage space in the aft portion of the boat, Friday, indicating it was not used for emergency purposes. It said a US navy warship helicopter crew discovered the overturned hull 1,000 miles off Massachusetts. A close inspection of the debris confirmed the identity of the yacht, which had been flooded. It said: "The swimmer determined the boat's cabin was flooded and windows were shattered, contributing to the complete flooding inside. http://www.theguardian.com/world/2014/may/23/us-hull-missing-yacht-search-cheeki-rafiki Looks like the yacht has hit a submerged object. polluted Oceans and seas on the rise. Quote Link to post Share on other sites
Black Panther 1,586 Posted May 26, 2014 Share Posted May 26, 2014 And they didn't notice the keel had snapped off? Quote Link to post Share on other sites
Steve Pope 243 Posted May 26, 2014 Share Posted May 26, 2014 Looks reasonably calm, maybe they will put another diver down? Quote Link to post Share on other sites
sailinghigh 0 Posted May 26, 2014 Author Share Posted May 26, 2014 And they didn't notice the keel had snapped off? http://www.bbc.com/news/uk-27462450 Quote Link to post Share on other sites
w44vi 17 Posted May 26, 2014 Share Posted May 26, 2014 No compression damage to the back of the keel, no tearing at the front, only tearing on the side looks to me like it "fell off" rather than collision Quote Link to post Share on other sites
Island Time 1,235 Posted May 26, 2014 Share Posted May 26, 2014 Not sure I agree with that. 2 front bolts remain in place. Hex heads and washers visible. Rear bolt shows rust marks, possible corrosion. Center bolts appear to have pulled through the hull taking some laminates with them. There is a high res pic and ongoing discussion about this on sailing anarchy. Consensus seems to be prior damage. There are a lot of bene 40.7 s sailing all over the place, without issues. My condolences to the families, sad to see. Without knowing the boats history, and examining the wreck, anything else is speculation. Quote Link to post Share on other sites
tuffyluffy 76 Posted May 26, 2014 Share Posted May 26, 2014 Apparently water comes through the keelbolts on these things when the backstay is cranked on. Hardly desirable. Quote Link to post Share on other sites
Black Panther 1,586 Posted May 26, 2014 Share Posted May 26, 2014 Initial viewing says not many bolts and all in one row. Quote Link to post Share on other sites
Guest Posted May 26, 2014 Share Posted May 26, 2014 the fwd two bolts look to have flexural failure. have you ever got a crescent on an over length deck fitting bolt and given it a wiggle ? It doesn't take much to part them off at the nut. the aft bolt has had some on going issues buy the looks of things. Quote Link to post Share on other sites
Guest Posted May 26, 2014 Share Posted May 26, 2014 what there like on the inside Quote Link to post Share on other sites
Island Time 1,235 Posted May 26, 2014 Share Posted May 26, 2014 Tuffy, I'd be interested in your source? Can't find anything online about that - admittedly only a quick search. FNG you beat me to the pics.. Quote Link to post Share on other sites
tuffyluffy 76 Posted May 26, 2014 Share Posted May 26, 2014 Tuffy, I'd be interested in your source? Can't find anything online about that - admittedly only a quick search.FNG you beat me to the pics.. Only from a mate that did a rough Fastnet on one. Owner wasn't concerned because 'it was common' on that model. Havent searched/confirmed it myself but I'll have a look. The pics above seem to show rust on the aft bolt which maybe a symptom of it Quote Link to post Share on other sites
Absolution 7 Posted May 26, 2014 Share Posted May 26, 2014 I've never understood why a lot of AWBs have keel bolts in that configuration I.e. bolted through the hull laminate rather than thru the chunky structural bit right next to it. Well at least it should be a structural member. Looking at the hole where the keel used to be there ain't a whole lot of meat there... Especially with a big lever hanging off it. Quote Link to post Share on other sites
Dambo 44 Posted May 26, 2014 Share Posted May 26, 2014 Wow, that look pretty light engineering! You haven't seen the bolts in a Spencer then! Quote Link to post Share on other sites
w44vi 17 Posted May 26, 2014 Share Posted May 26, 2014 I've never understood why a lot of AWBs have keel bolts in that configuration I.e. bolted through the hull laminate rather than thru the chunky structural bit right next to it. Well at least it should be a structural member. Looking at the hole where the keel used to be there ain't a whole lot of meat there... Especially with a big lever hanging off it. You don't want to drill holes in frames, as it weakens them, the floors should be attached well to the frames. Quote Link to post Share on other sites
Absolution 7 Posted May 26, 2014 Share Posted May 26, 2014 It still seems to be asking a lot from the laminate especially when its got a whole of chopped strand mat in there. .... There appears to be no keelson to speak of. I'm sure it is engineered to ABS, ISO or whatever standard but it just doesn't look right. Quote Link to post Share on other sites
Guest Posted May 26, 2014 Share Posted May 26, 2014 The Hull has stood up well. The bolts and attachment to the hull exterior is the issue. It appears to me to have suffered side impact or failure from poor attachment/bolt/s and loadings. Quote Link to post Share on other sites
RushMan 31 Posted May 26, 2014 Share Posted May 26, 2014 I've never understood why a lot of AWBs have keel bolts in that configuration I.e. bolted through the hull laminate rather than thru the chunky structural bit right next to it. Well at least it should be a structural member. Looking at the hole where the keel used to be there ain't a whole lot of meat there... Especially with a big lever hanging off it. You don't want to drill holes in frames, as it weakens them, the floors should be attached well to the frames. If drilling holes through the frame weakens the frame, why not make the frame bigger to cope with the hole being drilled through later? Quote Link to post Share on other sites
John B 106 Posted May 26, 2014 Share Posted May 26, 2014 I've never understood why a lot of AWBs have keel bolts in that configuration I.e. bolted through the hull laminate rather than thru the chunky structural bit right next to it. Well at least it should be a structural member. Looking at the hole where the keel used to be there ain't a whole lot of meat there... Especially with a big lever hanging off it. You don't want to drill holes in frames, as it weakens them, the floors should be attached well to the frames. If drilling holes through the frame weakens the frame, why not make the frame bigger to cope with the hole being drilled through later? Exactly. Thats how Kiwi boats are built. The 'frames' are actually called floors or floor timbers historically and have the keel bolts through them. This ludicrous business of attaching a keel to the skin of a hull is a euro idea.,, probably evolved from the days of a substantial keelson but now devolved into this state of affairs. It makes no difference that these boats 'don't have problems', they sure as hell do now. These keels are time bombs and every one needs to come off, its just like the crap metal through hull/ skin fittings that are dissolving away in a few years. They need to be changed. Quote Link to post Share on other sites
Guest Posted May 26, 2014 Share Posted May 26, 2014 Imho I don't think where the bolts are is the issue, as in through the floors, or flanges. also note most of the floors are hollow on these types of production boats. I lot of the newer production boats have the keel bonded to the hull with mastic. Say this is 3mm thick and the keel top 200mm wide this is quite a lot of wiggle movement room so to speak. And again imho this will not help the fatigue life of the centreline bolts. There doesn't appear to be a lot if any woven cloth in the supporting area of the keel of the boat concerned either. Quote Link to post Share on other sites
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