Anchor's and engine block away? - Page 2 - SailNet Community
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post #11 of 29 Old 07-09-2007
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The problem with concrete blocks is that they are far less dense than an steel mushroom anchor or cast iron engine block—so the effective weight they represent is far less, given the same mass. Also, a mushroom anchor, will tend to be fairly effective, more so than its actual mass would indicated, as it becomes buried in the bottom over time. Concrete blocks may not bury themselves as effectively, nor may an engine block, which presents a much larger surface area to the bottom than the much more compact mushroom anchor does.

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post #12 of 29 Old 07-09-2007
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And most engine blocks are no longer cast iron.

“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.
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post #13 of 29 Old 07-10-2007 Thread Starter
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Would a 60 pound danforth be too big to moore the 29' Islander?
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post #14 of 29 Old 07-10-2007
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I wouldn't use a Danforth Anchor, since they have a really bad record if the tide or wind changes direction.

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post #15 of 29 Old 07-10-2007 Thread Starter
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even while using them in the bahamian style mooring?
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post #16 of 29 Old 07-10-2007
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In a bahamian moor, the other anchor helps prevent the Danforth from pulling out. However, you didn't mention using it in a Bahamian moor or even a dual anchor setup.

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post #17 of 29 Old 07-11-2007
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Quote:
Originally Posted by JagsBch
I really want to make sure that what ever I do, it will first be safe as well as being as environmentally friendly as possible.
Assuming you actually mean what you say, why not contact your local Coast Guard and see how they feel about you dumping used car parts in a public waterway for your own personal (and probably illegal) "permanent mooring"?
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post #18 of 29 Old 07-11-2007
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Dumping an engine block is illegal. Local authorities just arrested someone for doing exactly that, he planned on using the two he dumped as a mooring, he could have used it for his bail.
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post #19 of 29 Old 07-11-2007
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A 2 anchor setup in a tidal area for a mooring will insure you spend half a day unwinding the 2 rodes when you visit your boat!
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post #20 of 29 Old 07-11-2007
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As was mentioned, a mushroom sinks into the bottom and acts almost like a Danforth or Fortress anchor. With an engine block you are basically relying on the dead weight. And you really need to pull a mooring every few years to examine it carefully. A new mushroom costs about $1 per pound. So a 300 pound mushroom which should be adequate for a 29 foot boat is about $300. You could probably find a good used one for half that. Not much in the scheme of things considering it will last for 10-20 years. The biggest expense of a mooring is the upper chain and pennants which need to replaced regularly.
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