Anchoring

[StephenW]

Dropped the hook as a bit of an experiment this weekend just gone and was pleasantly surprised how straightforward it was to lift again, despite the fact that its 25ib and was on about 5m of 10mm chain. The only tricky bit was breaking back out of the mud to retrieve it, which was sorted by snubbing short and wave action.

Anyone any idea what weight reduction the density of the water creates by being displaced by chain/anchor. Someone quoted something like 20% reduction in true weight?

I do know that in the yard when ashore the deadweight of the anchor and only 3-4 m of chain was getting very hard to retrieve.

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[steve_cronin]

Archemedes Principle - easy to calculate

If you know the weight of the immersed gear multiply this by the density of steel (available from any mathematical or physical tables). This will give you an answer in cubic centimetres. Since one cc of water weighs 1gramme and 2the upthrust is equal to the weight of fluid displaced2, this will give you the upthrust in grammes.

Steve Cronin



<hr width=100% size=1>The above is, like any other post here, only a personal opinion

 

[Twister_Ken]

Good lord

What sort of yard do you use for overwintering if you have to drop an anchor?

<hr width=100% size=1><A target="_blank" HREF=http://www.writeforweb.com/twister1>Let's Twist Again</A>

 

[Jacket]

13% reduction in weight for a steel anchor, 35% reduction for an aluminium alloy one.

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