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Anchor sugestions.


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The so called modern anchors are not that modern anymore but the general difference is a concave scoop rather than convex flukes i.e ploughs dig in by literally making a furrow so they require a bit of runway and seabed composition like a farmers paddock and if you have ever ploughed a field with a wee Massey Fergusan 35 then you know how important soil structure and the absence of rocks are! The modern anchors are all a variation of a digger bucket  with differences in degree of concavity, blade area, stiffness of structure etc. The Excel appears to be a hybrid with elements of the plough and spade anchors combined.

But they are all pretty much of a muchness once you get into the proven models- Rocna's, Supremes, Sarca's, Spades etc with each manufacturer having loyal adherants and theres alway plenty of scuttlebutt about the quality- i.e "chinese manufactured anchors are no good etc" but just get one that fits your boat roller and budget and you're good to go. There are no bad choices for our local conditions. The rule for anchors is if youre unsure just get a bigger one!

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18 hours ago, Fish said:

My experience with using them in water indicates that would not be the case. The plough, I think the chain was doing most of the holding, we could never tell if it had set (i.e. it hadn't set). The excell, it pulls up tight and hard every time.

If you want to get all techo about it, the steel is the same relative density in and out of water between the two anchors. Both anchors are approx the same weight, so being in or out of water isn't going to make any differentiation.

But note, I never said this was a technical anchor test. I just wanted to see how they set, and was blown away with the difference in setting performance. Enough said.

Bottom type does make a lot of difference with anchor performance. That said, I believe Arkles Bay is typical of most places I park, and more to the point, broadly typical of Hauraki Gulf anchorages. By spare anchor is a fortress, which is ideal for soft bottoms. The difference in performance between a plough and an excell is never, ever going to be addressed by bottom type. I doubt I'd used a plough to anchor a sunshade at a BBQ....

 

I was curious as to the hydrodynamics ( water flow over the flukes as they travelled thru the water) of the anchors as they ...

 

A. Travelled to the seabed.

B. Were dragged across the sand / mud.

 

...and weather that had an effect on setting or not.?

 

 

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39 minutes ago, Blunt Instrument said:

 

I was curious as to the hydrodynamics ( water flow over the flukes as they travelled thru the water) of the anchors as they ...

 

A. Travelled to the seabed.

B. Were dragged across the sand / mud.

 

...and weather that had an effect on setting or not.?

 

 

Unlikely. Its an anchor, not a foil. Hydrodynamics are not normally factors for lumps of iron and steel. When I launch my anchor, it hangs straight down of the chain.

The shape of the anchor and how it interacts with the seabed are key, I believe. The plough lies on it side and that is that. The excell has a little downward point at the tip, like a concord nose. This catches and digs in very fast.

Note, I'm not a technical specialist in anchoring. Just a guy that owns a boat and doesn't like dragging off when I'm having a nap.

HS1850-Kit.jpg

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4 minutes ago, Fish said:

Unlikely. Its an anchor, not a foil. Hydrodynamics are not normally factors for lumps of iron and steel. When I launch my anchor, it hangs straight down of the chain.

The shape of the anchor and how it interacts with the seabed are key, I believe. The plough lies on it side and that is that. The excell has a little downward point at the tip, like a concord nose. This catches and digs in very fast.

Note, I'm not a technical specialist in anchoring. Just a guy that owns a boat and doesn't like dragging off when I'm having a nap.

Sounds good to me. I was just wondering if somebody had any thoughts on how anchors are influenced by water flow.... But I guess they're like bricks ... To bloody heavy to be influenced by any thing but weight and gravity!

 

 

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