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Post by Zanshin on Jan 18, 2015 10:23:11 GMT
I opted to go from the standard 12mm G30 chain to 10mm G70 on Zanshin. That saved me about 150Kg with about 400ft/120meters of chain. The new G70 is a bit more susceptible to rust but has treated me well so far. Here's a link to my page on anchor chain.
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Post by hoppy on Jan 28, 2015 23:41:15 GMT
I got some prices for the 8mm G7 today. 100m for €728 and 75m $545 I was thinking around the 80m mark and maybe adding some rope, but now I have realised that 100m of 8mm G7 is the same weight and take up the same volume in the locker as 60m of 10mm. Just a thought ..... Whilst I understand conventional wisdom is that the heavier the chain, the better the holding power. I would imagine anchoring with 100m of 8mm weighing 140kg must be much better than 60m of 10mm also weighing also 140kg... If I have the room to use all 100m then great
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Post by sailbleu on Jan 30, 2015 8:03:55 GMT
So many people , so many opinions. Before I had 60 meter , never felt any need for more. Now (new) I have 75 meter and will never use the full lenght I'm sure. With all the gear and watertank in front I'm bow-heavy at it is , so that 25 meter ( to 100 that is) extra makes a difference for me. There's some weight leverage where the chain is stored.
They say when on anchorage alot it's best to replace the chain every 5 year. But here' s my aproach : Maybe My shallow keel gives me that small advantage of anchoring less deep. So it is my experience that only max 30 meter of my chain is regularly used , 4 meter , scoop 7 you know the drill. After 4 or 5 years you can turn the chain and use the pristine end of it. Provided you make sure that end is greased in a bit to prevent corrosion of being piled up in the locker all those years. When wintering in the marina it's recommendable to take the chain out and store it in a container after dipping it in some engine oil . Nice cover to keep the water out ans the chain will look like new when the sailing season starts again. For those who wonder why - at the beginning of the marina-winter season - there is much oil floating around in the marina , ......yeah , poring oil in the anchor locker also preserves the chain , dont need to tell you what happens when it rains of course.
So the 30 meter use taken into account , and the fact that every year you need to cut some shackles off when using s/s D-coupling or s/s anchor ( galvanic corrosion remember) , i would say 70 meter will get you going for some years. It' s also wise to always use a damper on the chain to absorb the shocks , but that's common knowledge i would guess.
Regards
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Post by sleighride on Feb 2, 2015 17:48:40 GMT
THE JUNE, 2014 issue of Practical Sailor has an excellent article on anchor chain types and grades which is directly relevant to this discussion. After 10 years with 150 feet of high test 5/16th chain (G43), it was rusted and so I just replaced it with 200 feet of the same high test chain and then I spliced the chain to 300 feet of 5/8th three strand nylon rode. (I own a DS 43 and do extensive anchoring in British Columbia and in Alaska, often in over 100 feet of water.)
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Post by hoppy on Feb 17, 2015 7:33:18 GMT
I just received a question about whether I want RINA Certification for the chain...
My first thought is that it is perhaps only necessary in circumstances where insurance requires it, Lloyds register or if the boat is used for charter/commercial and the authorities want it.
Any thoughts?
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Post by MartyB on Feb 18, 2015 2:48:03 GMT
You probably do not need this. It sounds like or maybe something I had to deal with at work, where we sold some wire to a government agency, that had to have some of the wire at that particular manufacture time, tested to show it met the minimum braking strength. This is supplied to us by the manufacture with an engineers stamp on it.
Of course, I could be wrong on the cert they are asking about.......
O personally would not ask for it, if the supplier is or has in the past been good, you know that the manufacture is not in China........local, be it Europe or say North America for me.
Marty
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mac
New Member
Posts: 4
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Post by mac on Feb 26, 2015 16:40:42 GMT
this is my first post- Ive just ordered a 379. My current stress is about anchor chain- intersting posts my reading suggests force exerted on 11m sailing boat in 50 knts of wind should approximate to 1200kg. this will of course increase with surge etc. 40 grade 8mm chain is rated for 1000 kg working load limit, with a 7000 kg breaking strain 14 mm rope is the maximum size for 8 mm chain, this has a breaking strain of more tha 4000 kg- not sure about WLL. This arrangement seems very tempting in view of the huge reduction in weight compared to 10mm chain- which doesnt gain much in WLL. has anyone used 8 mm chain on a 379?
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Post by MartyB on Feb 27, 2015 6:07:31 GMT
Mac,
For me in the US any how, 8mm is equal to 5/16" chain. I know of an SO49iP that is using ALL 5/16HT chain! I am sure that boat that has been from here in Seattle to Oz and back is heavier etc. He is having no issues anchoring with that setup.
I would use around a boat length of chain, then all rope and a 10-12KG anchor if I had your boat.
Marty
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Post by hoppy on Apr 30, 2015 15:38:52 GMT
New windlass fitted and 102m of 8mm grade 70 chain (aqua 7) is in place. I currently don't have a proper way of connecting the chain to the anchor but I'm not going anywhere this trip. I have ordered this oversized link, which is from Maggi for their 8mm aqua 7. For some reason, the guy who ordered the chain had problem with Maggi ordering it, so I ordered it from Jimmygreen and a certified D shackle
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Post by alenka on May 3, 2015 9:34:25 GMT
I had extra chain added last year. It was evident from the start that it just didn't work properly with my Windlass and on closer inspection the links were different albeit the same size. Apparently there is a short link and a long link!! It has been replaced free of charge by the yard but until I visit in a week or so it is anyones guess as to if there is any problems with the new stuff and the windlass.
I am now told by a trusted engineer that looked after a fleet of 40 charter boats that he would have started again with a complete new chain, he just doesn't trust those connecting links.
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Post by hoppy on May 3, 2015 10:39:32 GMT
I had extra chain added last year. It was evident from the start that it just didn't work properly with my Windlass and on closer inspection the links were different albeit the same size. Apparently there is a short link and a long link!! It has been replaced free of charge by the yard but until I visit in a week or so it is anyones guess as to if there is any problems with the new stuff and the windlass. I am now told by a trusted engineer that looked after a fleet of 40 charter boats that he would have started again with a complete new chain, he just doesn't trust those connecting links. I guess you have 10mm chain. DIN 766 is for 28mm links and ISO4565 is 30mm. For all other chain sizes DIN and ISO are the same. I added an extra 40m last year and I realised by the end of the season that it was a mistake as the original chain was so ratty.
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jc
Junior Member
Posts: 11
Jeanneau Model: SO DS 50
Yacht Name: Nereus
Home Port: Jersey
Country: GB
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Post by jc on Aug 28, 2015 15:45:11 GMT
Hoppy
I was wondering how you are getting on with your new Maggi Aqua7 8mm chain?
Can I ask where you bought it? I am also in Greece (Preveza). Your price seems to be much cheaper than a quote from Jimmy Green.
Is it showing signs of rust after one season?
many thanks John
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