Mooring a 13 ton sailboat ( Morgan 41 OI ) - SailNet Community
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post #1 of 5 Old 07-19-2016 Thread Starter
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Mooring a 13 ton sailboat ( Morgan 41 OI )

Hi everyone,
I have a 1974 Morgan 41 Out Island. It displaces about 27,000 lbs. I want to moor it every summer, which would be from May to September. It would go on my current mooring in fresh water (a protected bay on one of the Great Lakes).

The system begins with three mushroom anchors (100 lbs, 200 lbs, 250lbs) which were laid down 30 years ago. The depth of the water is around 8 feet. I will replace all chain, swivels, etc. Currently a 30 ft O'Day swings on the mooring with no issues.

It is a fairly protected spot but can be counted on for a few good storms each season, with winds up to 30-40 mph.

Everyone tells me that I am silly to moor it and I should keep at a Marina. Yes, it could break loose but the yearly $ savings and the fact that it will be right at our house is too much to give up.

I think, with the right size and length of chain I will be safe to moor this heavy sailboat.

Any thoughts or advice is much appreciated.

Thank you.
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post #2 of 5 Old 07-19-2016
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Re: Mooring a 13 ton sailboat ( Morgan 41 OI )

Mooring Basics - How to Install a Permanent Mooring
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Re: Mooring a 13 ton sailboat ( Morgan 41 OI )

You can put together the underwater bits pretty easily, but the weak point in the setup will be where the pennant comes aboard the boat. Even with the best chafe gear it only takes a short time, in the right conditions, to wear through it and the pennant and your boat is going walkabout.
I understand that most of the communities in the Northeast that allow moorings have strict regulations about fabricating them, so that's where I'd go to get the information as to what size, length and weight the underwater bits should be.

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Re: Mooring a 13 ton sailboat ( Morgan 41 OI )

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Originally Posted by capta View Post
You can put together the underwater bits pretty easily, but the weak point in the setup will be where the pennant comes aboard the boat. Even with the best chafe gear it only takes a short time, in the right conditions, to wear through it and the pennant and your boat is going walkabout.
I understand that most of the communities in the Northeast that allow moorings have strict regulations about fabricating them, so that's where I'd go to get the information as to what size, length and weight the underwater bits should be.
This has been covered here several times before.

The issue with the chaff is the stretching and un-stretching of the fibers internally in the bow pendant as it goes over the bow chock. The fibers heat up, and then melt and then break. If the bow eye were made really strong then you would use a large cable SS, but for most boats that is not an option.

What is an option is a dyneema Cyclone Pendant which then attaches to your mooring pendant, which attaches to the chain. The Cyclone is expensive, but its has about as much stretch as steel cable, but it bends.

It the hurricane Sandy event a few years ago, no boat connected with a Cyclone Pendant, to a stretchy nylon line broke due to chaff.

Google Cyclone Mooring Pendant.

New England Cyclone Mooring Pendant

http://www.neropes.com/Datasheets/MAR_CYCLONE.pdf

Debby Does Damage - Inside Practical Sailor Blog Article

Everyday Moorings - Seaworthy Magazine - BoatUS
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Re: Mooring a 13 ton sailboat ( Morgan 41 OI )

Not clear how those three mushrooms are connected together, but in general, I don't think they would be satisfactory for a boat your size. You are more than twice the displacement of the ODay 30. Here's another site with good info on moorings.
Mushroom Anchors --
Note that they recommend at least a 600 lb mushroom for a boat your size. The mushrooms you have are recommended for boats 25 feet or less! A mooring is not a place to take shortcuts.
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