Annual Anchor Musings

[Clyde_Wanderer]

what size for you - 3kgs - 7 kgs ? what have you got at the moment ?

I wouldn't anchor my Mirror with a 3kg anchor no matter how good the design! I couldn't quite bring myself to trust the 15 pounder either and have been considering the 25. I've currently got a 20lb plough.

So do you reckon that a 10kg bruce is too small/light for my HB30 which is 3.2 tonne displacement?

[Ancora Latina]

So do you reckon that a 10kg bruce is too small/light for my HB30 which is 3.2 tonne displacement?

This is a common mistake to classified anchors with their weight.

An equal weight, the efficient blade (fluke) surface area of a fisherman anchor, a Bruce or a CQR anchor and any « New gen » anchor are completely different.

If a 3kg anchor has about the same blade surface area than a 10 kg Bruce, its holding should be quite similar.

Unfortunately (on purpose) manufacturers don’t indicate the surface area of their anchors. Below you will see side by side, a 70 kg Bruce compared with a 44 kg AL



For me, no doubt… I prefer to be anchored with a 44 kg Raya than with a 70 kg Bruce... less weight on the bow for a much more efficient anchor!

João

[Clyde_Wanderer]

So do you reckon that a 10kg bruce is too small/light for my HB30 which is 3.2 tonne displacement?

This is a common mistake to classified anchors with their weight.

An equal weight, the efficient blade (fluke) surface area of a fisherman anchor, a Bruce or a CQR anchor and any « New gen » anchor are completely different.

If a 3kg anchor has about the same blade surface area than a 10 kg Bruce, its holding should be quite similar.

Unfortunately (on purpose) manufacturers don’t indicate the surface area of their anchors. Below you will see side by side, a 70 kg Bruce compared with a 44 kg AL



For me, no doubt… I prefer to be anchored with a 44 kg Raya than with a 70 kg Bruce... less weight on the bow for a much more efficient anchor!

João

No expert here but I am inclined to dissagree with you on the weight fact, not much good having a large area if it doesent have enought weight in it to start digging itself in as opposed to skimming along the bottom.
The chain also plays a big part in the dig in by drawing the anchor in the correct attidude for the point to dig in.
Looking at your anchor I reckon there is too much blade area behing the stem base to be effective.
Then again if the bruce were placed as near to the camera as the other anchor in your pic it might be a more realistic comparrison.

[Ancora Latina]

Hi Clyde_Wanderer,

It is perfectly your right to disagree with my theories...

When I talk about holding, I’m not talking about the setting of the anchor, but as you evoke this question, let’s talk about it:

They are two types of penetration, the first one, the static penetration, and then the dynamic penetration.

1° Static penetration: - this is the first phase, the most important one, and this penetration is related to two parameters:
a) the penetrating angle
b) the pressure of the tip over the sea bottom (kg/cm² or pounds by square inch)

Here with this last parameter, we need both a sharp tip and, you’re right, WEIGHT

I suppose you have a very precise idea of how different anchors compare in relation to this tip weight?
-The RAYA anchor has a tip weight of between 34 and 37% of the total anchor weight, which is one of the most heavy tip weight repartition.
- As the single tip is very sharp and as the penetrating angle is perfectly designed, the penetration of this anchor is very fast – usually less than one shank length...

2° Dynamic penetration: when the first phase of static penetration is done, the pulling force exerted by the boat on the anchor will carry on digging in the anchor.

Then when the anchor is deeply set, it is the Surface area of the fluke which give the holding!

No, the chain doesn’t play a big part for digging in the anchor, if the anchor is not well designed, you can use as long chain as you want, your anchor will never set. On the other way, you can perfectly dig in a (good) anchor with a rode rope, as long as you have an angle nearly horizontal (scope)

« Looking at your anchor I reckon there is too much blade area behind the stem base »

I twill be interesting that you may develop this theory – mine is completely different : -You can attach the base of the shank anywhere you want on the shank, the important thing is the angle between the attachment point of the rode and the center of gravity of the blade.

If we choose to fix the shank where we have fixed it, it’s because we have very good reasons for doing that, reasons that doesn’t seem obvious for you... but be sure that our anchor is very, very effective !

[sahona]

My eyes are bleeding, and it's that fekkin troll-stirrer MacHurleys fault. Beam him up Nicky.

[FullCircle]

My eyes are bleeding, and it's that fekkin troll-stirrer MacHurleys fault. Beam him up Nicky.

Ha, you lot know nothing.

You need a Flook.

Verr Cheep

http://www.jimmygreen.co.uk/chandlery_p ... anchor.htm" onclick="window.open(this.href);return false;

£6.25. Wot a BARGIN.

Doan even need no chain.

That should appeal to the parsimonious.

[aquaplane]

All you really need is a 56lb weight, it's NFN (normal for Norfolk) so it must be right.

[sahona]

shh.
Jim, stop adding noxious flammable gasses to the argument. Evacuate your bladder.

[Silkie]

How about supplying us with a test anchor João? Whatever size you recommend for Silkie would be fine.

I can guarantee you will get an honest user report on a site which consistently comes in the first page of google searches for yacht cruising.

[Clyde_Wanderer]

[quote="Ancora Latina"]Hi Clyde_Wanderer,

It is perfectly your right to disagree with my theories...
They are two types of penetration, the first one, the static penetration, and then the dynamic penetration.

AC ,Is that the same as vaginal and annal penetration, or have I got that back to front too?
Told you its my Lesdixia.
Have you tried selling cars? there's more money in them and your patter is brilliant.

[Ancora Latina]

How about supplying us with a test anchor João? .

Why not??

This is a scoop! But don’t tell anybody...

We are on the way of doing the manufacturing of the complete line of anchors, for the European market, somewhere on the South of U.K…

We can easily study the possibility of sending you a test anchor…

João

[Clyde_Wanderer]

How about supplying us with a test anchor João? .

Why not??

This is a scoop! But don’t tell anybody...

We are on the way of doing the manufacturing of the complete line of anchors, for the European market, somewhere on the South of U.K…

We can easily study the possibility of sending you a test anchor…

João

For free? Yipeeee yipeeee

[Ancora Latina]

Hi Clyde_Wanderer,

It is perfectly your right to disagree with my theories...
They are two types of penetration, the first one, the static penetration, and then the dynamic penetration.

Hi Clyde_Wanderer,
Many thanks for your suggestion..

May I also suggest you to put the "end of quote" mark (]/quote[) at the end of the phrase you want to quote..

[sahona]

Who's winding whom and with what... as the song about the chappie from Kharthoum goes..

[Ancora Latina]

For free? Yipeeee yipeeee

Of course for free.. The only fee you may have (perhaps) to pay should be the one of the customs... That's why, I would like to send it to you from our future manufacturing plant in U.K.

Please contact me back on the company E.mail: info@ancoralatina.com

João