An anchor thread for linguists.

I thought the concept interesting as it does look like a Rocna and the manufacturer is giving the ultimate complement and not even changing the name, much.

I don't know UK prices (or even Australian prices for a Rocna, though I could check) I calculated that a 15kg Roca would cost about stg189, and as you point out excluding freight, VAT and warranty.

However it is difficult to identify what flaws might exist, or not, but the facet I noted was that they appear to have a slot in the fluke for the shank and then weld the shank from top and bottom. This is good engineering - though I have never, ever, heard of a Rocna, nor in fact any other anchor - failing at the crown (where the fluke joins the shank)

I may well be wrong but it is not in fact a copy of a Rocna, or if it is - its a bad copy and will not perform well, think half the hold of the same weight Rocna.

Rocna is a ballasted anchor, it has weight in its toe, the forward part of the fluke. If you look at a Rocna, or even a picture of a Rocna, the front part of the fluke has twice the thickness of steel of the back of the fluke (heel). This double steel thickness will give the toe strength - but you cannot get away from the fact its ballast. Coincidentally if you make a rough calculation the ballast of the Rocna is similar to the ballast in a Spade. The difference being the ballast of the Spade is focussed that of the Rocna spread about (and this latter is not so effective).

This is the self same error that Mantus made (thinking that Rocna is not ballasted) and a 15kg Mantus has half the hold of a 15kg Rocna.
(i've measured both and others)

The big give away is that ballasted anchor have the crown about 1/3rd or 1/2 way along the fluke, Spade, Excel, Delta, Rocna, Ultra and unballasted anchors have the crown at or near the heel Danforth, Britany, Fortress, Bugel, Viking and even 'behind' the heel Bruce (and to me Bruce had the location - spot on!).

Both the Mantus and Roca are, or seem to be, unballasted but have their crown in the location of a ballasted anchor. These mavericks will hold - but with a reduced performance - and no upside. So if hold is important kg for kg of anchor weight the mavericks will offer around half the hold. Now if hold is not important - then look at price, delivery costs and wonder why a manufacturer would build an anchor with half the hold when he could double performance just by moving the crown. I say 'just' they might need to make other design alterations.

My view, very subjective is - these mavericks are made by people who don't understand anchor design.

I have moved the shank of the Mantus back, so the crown is near the heel - it improves hold dramatically. I did not move the crown right back because I needed bolt holes and I was afraid that I'd compromise strength and the fluke would fold up. (Mantus is bolted together)

Just because an anchor looks like a Rocna - does not mean it will perform like one.

Maybe its good no-one can read the Roca website - and are not tempted to buy one

And maybe you get what you pay for?

Jonathan
 
Um modelo de âncora com alta velocidade de enterramento em vários tipos de fundo e resistência à tração em ventos fortes orientou o desenvolvimento da rocaαnkora.

"A model of anchor with an old bicycle in its entirety giving all sorts of fun. Although hard to track down, sales are strong in the east although the anchors dissolve."

Colocamos à disposição dos navegadores brasileiros esta inovadora tecnologia visando proporcionar um lazer onde a prioridade é a segurança da ancoragem.

"Coal lorries have killed two Brazilian sailors who were indoors watching technology portion out underwear to readers, with priority cigars for those with anchor rage."
 
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