Another "Next Generation" anchor enters the market...

[MedSailor]

Originally Posted by cupper3

Anyone notice that the bolts are not only on the hoop, but also holding the shank to the fluke?

Those are the bolts that would concern me.

Why is everybody so concerned about bolts? Bolts hold most chain-plates on, and hold many a keel in place.....

Boltophobia.....

MedSailor

[tdw]

Originally Posted by JimMcGee

OK, here's a question. I picked up a 33# Manta claw for $13 when the local West Marine shut down (yes $13 that's not a typo).

Looking at the Manta chart I figured it would be a good upgrade from the 22#Danforth on the bow now. My boat is a 30' Catalina, 10,300lbs unloaded and the 22# Danforth is supposed to be rated for boats up to 38'.

Manta Size Chart
16.5lb Claw Anchor for Boats 24'-30'
22lb. Claw Anchor for Boats 31'-35'
33lb. Claw Anchor for Boats 36'-40'

Reading this thread got me curious. The size charts for the Lewmar are the same as the Manta, but the charts for the Manson Ray are quite different though it looks like the same design. Is this just a case of Manson being more conservative or is there some real difference?

Manson Size Chart
22lb. Ray Anchor, 18' to 25' Boat Length
33lb. Ray Anchor, 25' to 30' Boat Length
44lb. Ray Anchor, 30' to 40' Boat Length



BTW, no windlass so whatever I put on the bow comes up by hand.

I figure either the Danforth or Manta should be enough anchor for my boat, but from reading I understand the Bruce style anchors are quicker to reset.

Thoughts?

Not ever had our 'Bruce' require resetting I can't say whether they do it quicker or not. I have very rarely experienced real dragging once anchor was set but in both cases I can think of I'm prepared to put the blame on not enough scope. When our CQR dragged in sand it simply never set at all.
Once I've had at least 3:1 plus depth of water plus allowance for freeboard and all chain I've not had any problems including the old CQR.

[xymotic]

Originally Posted by JimMcGee

OK, here's a question. I picked up a 33# Manta claw for $13 when the local West Marine shut down (yes $13 that's not a typo).

Are you sure that wasn't Boater's World? West usually ships it to another store.

[JimMcGee]

Originally Posted by xymotic

Are you sure that wasn't Boater's World? West usually ships it to another store.

Yep, West Marine. They were holding it in the back for somebody who never came back to claim it. It was down to the last day or so before they shut down and the manager was playing lets make a deal.

It didn't hurt that I bought a ton of stay-set, three strand dock line, etc.

[ottos]

Jim,
What town was that WM in?

.

[Stumble]

I actually find anchor recomendations to be grossly undersized, and would always go up at least one step. The problem is that big anchors are expensive, and everyone buys on price. So manufacturers recommendations are the minimum you can get away with...

In addition most anchor recomendations are made for 50kn of wind... Since the force imparted by the wind goes up with the square of wind speed, what will work in 50 may not hold in 60, and will be grossly inadequate at 80kn. So unless you have somewhere to run too in the event of a major storm, a bigger anchor is always better.

This is why for sizing I recommend the biggest anchor you can get back on board, like the Dashew's I am convinced an anchor isn't big enough until people start laughing at you. I also recommend minimal amounts of chain, and putting that weight back into the anchor. The cantenary effect in major storms is a myth, but massive anchor weight isn't.

[SloopJonB]

Originally Posted by Stumble

I actually find anchor recomendations to be grossly undersized, and would always go up at least one step. The problem is that big anchors are expensive, and everyone buys on price. So manufacturers recommendations are the minimum you can get away with....

Why would a manufacturer recommend an undersized anchor? It's in their best interests, both financial and reputation-wise to recommend MORE than you really need.

[blt2ski]

Most recommendations I have seen are only for 40 knots of wind. Some anchor manufactures do have recommendations for 20 and 60 knot winds too. With most saying if you have a higher windage rig, ie catamaran or big power boat, to upsize also.

In the meantime, if you think the recommendations are too small, Try out this factor if I can type it correctly for the minimum anchor per the local race rules, and minimum of anchor and chain, or all chain!

(LOA/17) 3rd power for max anchor. For my 30' boat, that is 5.5 lbs IIRC, ie (30/17) = 1.7x1.7x1.7 IIRC

min metal total is X squared/80 or 11.25 lbs for my 30' boat,

with adequate sized diam rope at min 150' in length!

Most anchor manufactures are in the 15-25 lb range for a 30' boat like mine. Depending upon the style etc. Danforths seem to be a bit lighter in recommendation vs a claw/spade style. Aluminum danforths are as light as 7 or 11 lbs for my boat manufacture recommended.

Marty

[denverd0n]

Originally Posted by SloopJonB

Why would a manufacturer recommend an undersized anchor? It's in their best interests, both financial and reputation-wise to recommend MORE than you really need.

Well, yes and no. They want to make the sale. That means that they want to convince you that their anchors are better than the next guy. If they can sell you on the idea that a 30 lbs. anchor of theirs, which costs $200, is as good as the 40 lbs. anchor of the other kind, which costs $275, then you are more likely to buy their anchor.

So they kind of have paradoxical incentives--both to sell you a bigger anchor, and to convince you that you don't need a bigger anchor.

[SloopJonB]

Originally Posted by blt2ski

Most recommendations I have seen are only for 40 knots of wind. Some anchor manufactures do have recommendations for 20 and 60 knot winds too. With most saying if you have a higher windage rig, ie catamaran or big power boat, to upsize also.

In the meantime, if you think the recommendations are too small, Try out this factor if I can type it correctly for the minimum anchor per the local race rules, and minimum of anchor and chain, or all chain!

(LOA/17) 3rd power for max anchor. For my 30' boat, that is 5.5 lbs IIRC, ie (30/17) = 1.7x1.7x1.7 IIRC

min metal total is X squared/80 or 11.25 lbs for my 30' boat,

with adequate sized diam rope at min 150' in length!

Most anchor manufactures are in the 15-25 lb range for a 30' boat like mine. Depending upon the style etc. Danforths seem to be a bit lighter in recommendation vs a claw/spade style. Aluminum danforths are as light as 7 or 11 lbs for my boat manufacture recommended.

Marty

When Bruce made recreational anchors their web site spec'd a 10 kilo (22 LB) working anchor and a 20 kilo (44 LB) storm anchor for my 22,000 Lb Columbia 43.

I've seen people successfully anchor a 30 footer in a sheltered cove with a 2 1/2 kilo Bruce.

Unless you are a world cruiser, sizing your anchor for over 50 knots of wind is just creating work for Osteopaths and physiotherapists.

Of course, around here, there are hurricane holes everywhere.