Danforth advice

[James_Calvert]

So glad to see Neeves ecstatic in an anchoring thread...

On the 30m of chain, in the ordinary course of events, anchoring in say 10m or less of water, it's only the weight of the 10m of chain rising from the seabed which you are pulling up at any time. And for me it's only when the weight of the dangling anchor comes into play that it all gets a bit heavy.

To put some numbers to it.... 10m of 8mm chain weighs about 15kg. Then with a 10 to 15kg anchor on the end, that's 25 or 30kg to pull up.

 

[ianat182]

Can I suggest you pay a visit to the Gosport Boatyard /Scrapyard website and peruse their items for sale.
They scrap whole Yachts and Boats and their gear, and show it on their catalogue. They also have a free selling section as well for engines as well as craft.
Seems you may find a Danforth there.
Apparently there is no public access - may be health and safety concerns since they break up stuff too!

ianat182

 

[Neeves]

So glad to see Neeves ecstatic in an anchoring thread...

On the 30m of chain, in the ordinary course of events, anchoring in say 10m or less of water, it's only the weight of the 10m of chain rising from the seabed which you are pulling up at any time. And for me it's only when the weight of the dangling anchor comes into play that it all gets a bit heavy.

To put some numbers to it.... 10m of 8mm chain weighs about 15kg. Then with a 10 to 15kg anchor on the end, that's 25 or 30kg to pull up.

I tend not to look at the ideal.

Re-calculate based on 20 knots of wind, a bit of chop and deciding to vacate the location ....... single handed.

Jonathan

 

[WLane]

For the record, I'm purchasing a secondhand fortress guardian, plus I've found a rusty old Danforth type in my folks yard (there's all sorts in there). Time will tell how I get on.

On the use of a kedge, if I'm anchoring in a tidal estuary/river for instance, with little room to swing, are anchors set fore and aft going to be sufficient when the tide turns (so that the stern faces the flow after the turn of tide)? I have a sugar scoop transom which tapers quite a bit, and I could see me using this if it's workable.

 

[WLane]

Can I suggest you pay a visit to the Gosport Boatyard /Scrapyard website and peruse their items for sale.
They scrap whole Yachts and Boats and their gear, and show it on their catalogue. They also have a free selling section as well for engines as well as craft.
Seems you may find a Danforth there.
Apparently there is no public access - may be health and safety concerns since they break up stuff too!

ianat182

I will have at look at this, thank you.

 

[James_Calvert]

I tend not to look at the ideal.

Re-calculate based on 20 knots of wind, a bit of chop and deciding to vacate the location ....... single handed.

Jonathan

Think I'd want to use the engine ahead on tick over... might not get the chain wrapped around the prop or the keel. But with a mainly rope rode, not so sure.

Did something of the kind once, maybe lucky.

 

[Neeves]

To put the potential loads into context.

30m of 8mm chain at a scope of 5:1, so depth from bow roller 6m, requires or needs a tension of 70kg to hold the furthest link 'just off the seabed'. You would not be able to hold the chain unaided - you would need the engine running - in forward - preferably with someone on the helm keeping the bow to , accurately to, windward. Off windward the yacht will veer and snathch loads could be much higher.

Obviously if you spend your career lugging 25kg bags of cement around you are better equipped than most - as Tranona mentioned - you don't need an 8mm chain on the OPs yacht - 6mm would be more than adequate and 6mm will give you a fighting chance when the chips are down.

Or buy and instal a windlass.

Jonathan

 

[NormanS]

For the record, I'm purchasing a secondhand fortress guardian, plus I've found a rusty old Danforth type in my folks yard (there's all sorts in there). Time will tell how I get on.

On the use of a kedge, if I'm anchoring in a tidal estuary/river for instance, with little room to swing, are anchors set fore and aft going to be sufficient when the tide turns (so that the stern faces the flow after the turn of tide)? I have a sugar scoop transom which tapers quite a bit, and I could see me using this if it's workable.

In these circumstances you might consider bringing the line from the stern anchor, forward to the bow. That way, when the tide turns, the boat will swing round to face it.