Anchors again

[Georgio]

What size of anchor should I go for, I have a 7kg Danforth and about 5m chain then lots of rope. I realise that I need a whole lot more chain but is the anchor up to the job? (general mooring in all areas)

The boat is a GK24 and is around 1800kg.

Any comment are welcome

Also Is there any real difference between the CQR and other (much cheaper but similar looking) plough type anchors?




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[charles_reed]

The original CQR had a forged shank and additional weighting at the nose. As it is the shank which can get bent when the direction of pull changes, this is quite important

A Danforth is great in soft sand or in mud but is almost useless on rock or thin /hard sand.
It is very subject to having the shank bend.

The Americans were great ones for just using rope rode when anchoring, but their long-distance cruising fellow countrymen all seem to use chain.

The main difference between rode and chain is the scope you need to have, rode requires 5 - 9:1 whereas chain gets away with 3 - 5:1. Rode is definitely out on coral, the heads cut through it in no time.

There are so many tricks to anchoring that wherever you gather two experts together you'll get 3 definitive answers.


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[hylas]

Out of two "experts" :0) You will have about the same answer..

Considering the original CQR, the "additional weighting at the nose" is quite marginal as the weigth repartition at the anchor tip level is only 18% of the total anchor's weight (and 62% at the shank level) This is to be compared to 28% for the Delta and 50% for the Spade..

Not all copies are similar as they all are "cast" and not drop forged.. and this is not the same mechanical resistance.. also the "blades" of the cast models and thicker.. and this will change (on the bad way) the weight repartition..

Cast copies are cheaper but you will have what you pay for..

Fully OK with the Danforth's comments..

For a 24' boat and 1800 Kg I will sugest a 12 kg anchor... It was a very interesting anchor study done by John Knox in Jully and August 2002 issues of PBO..

About the mooring wrap. I suggest 20 meters of 8 mm chain and then a Nylon rope 14 mm directly spliced ON the chain (see http://www.bluemoment.com/warpchainsplice.html)

Fair winds and peaceful anchorages..


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[charles_reed]

Hylas,

Bienvenue mon am'

Dis rien sur la Spade?

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