[Rhodes22-list] Did I wrote that??

[Alain POIRAUD]

Hi Bill, 

We have done tests with only chain and no anchor, we have found that (on
sand) the force needed to start dragging the chain was approximately twice
the chain weight (the part lying on the bottom). A meter of 10 mm chain,
weight 2.25 kg  - this means for 30 meters, 67.5 kg.. or nearly nothing..
(if the chain is not rounded around a big boulder!) 

What is important is not really the weight of the rode, but the scope.. 

Table 6: Estimated Percent of Maximum Holding Power as a function of the
scope to water depth ratio

                Scope to water depth ratio	2/1	   4/1	    6/1	    8/1	   
10/1	   ∞/1
Percentage of maximum holding power	10 %	55 %	70 %	80 %	85 %	100 %


and you are fully right , with strong wind, that anchor chain section will
be lifted off the bottom at the “NEARLY”  the same angle as the rope
section?
And when you are launching your anchor, if the anchor chain section lying on
the bottom weighs more than the force of the wind on the boat, that anchor
chain section will perfectly  hold the boat so that the boat cannot drive
the flukes of the anchor into the bottom. That’s the reason why, after you
launch the anchor and pay out enough scope, you should always go backward ;
first slowly and then when the anchor hold (and stop the boat) at full RPM. 

This will drive the flukes of the anchor into the bottom and tell you if
your anchor hold well. 

Alain, 

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