Which anchor chain?

[matnoo]

Im assured that I have an over rated anchor for the boat (which im very happy with) which came with the boat.

I would like some chain. Its only going to be used inshore for now but would like the option of offshore in the future. Also, as im reasonably inexperienced, id like a setup that means that in open water I can just dump it all overboard and ill be safe!

I will use all the brains I can and im sure ill be fine in getting it right, but I want my first two nights at sea (this weekend) sleeping as safely and foolproofly as i can, knowing that ive allowed myself a reasonable margin for error in anchor deployment!!

Anyway....

For a 23ft, finkeel, i have 50m of very dynamic climbing rope. How much chain (galvanised?) and what kg rating would you suggest to tag onto the end of this?

Mat

 

[sarabande]

Keep it simple, use the Jimmy Green site

http://www.jimmygreen.co.uk/chandlery_products/chain.htm


I'd guess 30 m of 8mm chain to start with, though 6mm will be strong enough at approx 3 ton breaking strain. The only prob with climbing rope is that if it picks up sand, the particles can cause internal abrasion.

 

[Sans Bateau]

I suspect climbing rope has no elasticity either. Better off with Polyester multiplait.

 

[KenMcCulloch]

Dear Mat
Your boat will need an anchor in the 15-20lb range; heavier is generally better but not to the point that it upsets your boat's trim. I am not sure about using climbing rope as a warp, although it has plenty of elasticity which is good, it also has limited resistance to chafe both at the bow roller /fairlead and when scraping over rocks and old anchors etc on the sea bed, which is bad. I would suggest 12 or even 14mm anchorplait which is designed for the job.

Some chain between the anchor and the warp will help in this latter respect but the main purpose of the chain is to keep the load on the anchor horizontal. 5-10 metres of 6mm chain will probably be enough for that purpose, but 20 meters would be better. My advice would be to buy as long a piece of chain as you can afford.

Did you used to post a lot on uk.climbing.com?

 

[KenMcCulloch]

[ QUOTE ]
I suspect climbing rope has no elasticity either. Better off with Polyester multiplait.

[/ QUOTE ]

Au contraire mon brave. The whole point about dynamic climbing rope is its (dynamic) elasticity. Polyester multiplait by contrast has very little elasticty.

 

[douglas_family]

[ QUOTE ]


I would like some chain. Its only going to be used inshore for now but would like the option of offshore in the future.


[/ QUOTE ]

think you might also require a parachute to anchor offshore /forums/images/graemlins/tongue.gif

 

[Sans Bateau]

[ QUOTE ]
Au contraire mon brave. The whole point about dynamic climbing rope is its (dynamic) elasticity. Polyester multiplait by contrast has very little elasticty.

[/ QUOTE ]

Look at that, just exposed myself as knowing nothing about climbing ropes!

Any way, thought stretchy climbing ropes would be bungee jumping?

 

[pyrojames]

Non stretchy climbing ropes mean a broken pelvis when you fall and get brought up sharp by them!

 

[fireball]

Would you really want to fall from a rockface to be jerked by a non-stretchy safety line?! Could be very painful... especially if your harness isn't correctly fitted!

 

[Sans Bateau]

Bloody 'ell! I'll stick to sailing.

Going up the mast is scarry enough!

 

[gandy]

Depends how much weight you want to carry. 20m of 7mm or 8mm chain would be about right. Try these people for prices. I just replaced ours using their Grade 40 tested stuff.

http://www.boatgeardirect.co.uk/id1.html

 

[achwilan]

30m of 8mm chain will be kind of a nuisance in a stem chain locker for a 23ft boat... 10m will do the job if you have enough rope. I would not advise 6mm chain because it will rust and wear with time, just as any galvanized chain, with a thinner resulting security margin: 8mm is more comfortable in that respect.

 

[dickh]

6mm galvanised chain will be fine for a 23' keel yacht. Suggested would be 10 or 15m followed with your rope but personally would prefer all chain - usually sold in 30m lengths.

 

[Heigaro]

Matt, I've got some chain which we removed from a friend's chain locker - boat recently purchased by him.

You are welcome to have it, if you are able to collect, free of charge.

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/forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif

 

[ShipsWoofy]

har har

I just tried to flick the bug off my screen,

/forums/images/graemlins/laugh.gif

 

[GMac]

It's 23ft so 8mm and over only means you'll be carrying dead weight all the time for zero gain of any sort, obviously that is silly. 7mm x 20mts maximum. 10mts will do the job well though.

My 32fter is on 15mts of 7mm and that's my cruising rode. I've sat very happily thru 45knts, no problem.

12mm warp maximum for the same reason as above.

Min. break load of a good 6mm short link is 1800kg, 7mm is 2500kg, 12mm warp 2500-3000kg. Break loads are zero issue with you.

Climbing ropes are not actualy that stretchy untill you get well above the SWL. Can be used but there is better.

20-25lb old style anchor or a 6-8kg new generation.

Just remember your 23ft and any extra weight will just be a negitive.

Who said 30mts of 8mm? You'd sink the poor bugger.

 

[RivalRedwing]

Before you buy from a chandlers get a price from Griff Chains (no association etc)
http://www.griffchains.co.uk/