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Old 09-09-2017, 08:43 AM   #1
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Boat Roll

The wife and I are looking for a new boat. I know they roll with the soft chine. Can anyone comment on how they are stabilizers.
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Old 09-09-2017, 08:52 AM   #2
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A round bottom, displacement hull like the Krogen rolls in a beam sea but the motion is softer than a semi-displacement hull and should feel more comfortable in the same conditions.

Active stabilizers do work, but I have no experience on a Krogen. You can read about experiences of others with stabilizers on other boats by searching on stabilizers on this forum.

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Old 09-09-2017, 09:32 AM   #3
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I have Naiad stabilizers on my Krogen 42. Night and day when activated on a beam sea.
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Old 09-09-2017, 09:34 AM   #4
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What brand and model are you looking at?
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Old 09-09-2017, 11:11 AM   #5
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In this order Defever Krogen Nordhavn
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Old 09-09-2017, 11:46 AM   #6
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Totaly agree with Meridien
My 50ft Cheoy Lee is night and day.
Can go from 30 degree to 10-15 with the stabilzers in a quartering sea 25-30kts wind 6ft sea. Naiad stabilzers now (36yrs old)
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Old 09-10-2017, 07:38 AM   #7
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Quote:
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The wife and I are looking for a new boat. I know they roll with the soft chine. Can anyone comment on how they are stabilizers.
Our 43 Selene/Solo is stabilized, Wesmar. Makes the difference between stuff tossing off the shelves or not. Astounding difference. Ask anyone who has a boat with stabilizers if they'd like them removed at no cost... I can pretty well predict the answer.
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Old 09-10-2017, 08:56 AM   #8
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Salene is on my list. Another 43 was listed yesterday. I am moving away from the nordhavn having a bridge is a priority.
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Old 09-10-2017, 09:43 AM   #9
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I have Naiad stabilizers on my Krogen 42. Night and day when activated on a beam sea.
+1.

Stabilizers are must on my vessel when doing long trips.

Cheers.

H.
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Old 09-11-2017, 08:42 AM   #10
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If you are looking for comfort keep looking at full displacement hulls (not semi planning or fast hulls). What comes into play is the Moment of Inertia as to the type of roll you will experience (either a sharp correction or a slower more comfortable correction), this is often vessels with an overall heavier top side build (like steel) will have a better roll motion than a GRP vessel.

As above vessels with mechanical Stabilizers perform way better than those with out basically in any type of sea conditions, most of these are electric/ hydraulic operated with external fins, which in most cases are designed to break off in any major incident rather than damage the hull.

In modern vessels these are slowly being replaced by gyro stabilizers, which have no fins or external equipment of any kind , the up side is that they even work at anchor (very well) down side you must have your gen set running

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Old 09-11-2017, 10:16 AM   #11
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I would like someone to come up with a gyro computer programme that can be connected to both stabilizers and trim tabs that can work in unison, (yes, patent pending).
Anyone interested in building/marketing get in touch via private email.
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Old 09-11-2017, 10:39 AM   #12
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I agree that some sort of stabilization is needed for any long distance motor cruiser. My steel hard chine didn't have any and the roll in bad conditions was really not fun. However you should check all your options: active stabilizers; paravanes; passive flume tanks; gyros; etc.

What are your requirements - your priorities? For example, if you really require to subdue the motion while anchored then the answer is going to be quite different from the norm.
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Old 09-11-2017, 12:46 PM   #13
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A cheap and simple solution for steel boats is to fit a fairly long chine either side of the keel (and the keel if possible) using 'Laski effect' steel.
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Old 09-11-2017, 02:41 PM   #14
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IR,
I think you're talking about bilge keels. I don't really know but I'd shy away from them because they may induce chine tripping and hence possible capsizing.

I prefer a boat that will slide sideways on the face of a big wave.
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Old 09-11-2017, 02:51 PM   #15
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Bilge keels or rolling chocks?
One is a lot larger than the other.
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Old 09-11-2017, 07:46 PM   #16
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IR,
I think you're talking about bilge keels. I don't really know but I'd shy away from them because they may induce chine tripping and hence possible capsizing.

I prefer a boat that will slide sideways on the face of a big wave.
Really good point. Thanks.
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Old 09-11-2017, 07:46 PM   #17
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Stabilizers Worth Every Penny

We have a semi displacement hole on our Ocean Alexander 456. We have Trac stabilizers with three different modes of operation. I have been in 4 to 5 foot seas and not felt any side to side motion. Riding on our boat is more a kin to writing an elevator. I would not have bought our boat last year if it had not had stabilizers installed six years ago by the previous owner.

I have never heard of anyone who had stabilizers who wished they did not have them. I do have friends however, who have to limit their boating, because they or their wives have a difficult time with seasickness. One of these is a DeFever 49, no small boat and a full displacement hull.
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Old 09-11-2017, 09:45 PM   #18
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Yes I was talking of bilge keels and they've proved very effective both underway and stiffening a 'tender' boat. In all my years on the water I've never heard of a boat tripping on this side of the pond.
A boat with stabilizers here is as rare as hens teeth.
I'm afraid I'm a coward, not wanting a divorce I check the weather and don't go out in more than a Force 3/4 gusting to 5.
I know which side my bread is buttered on ! (Irish expression). Meaning I know when I'm well off.
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Old 09-12-2017, 12:22 AM   #19
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Is there a biblical formula in the maritime world in the proportions of rolling chocks in terms of construction to meet beam/length/depth? What determines the construction size of a given set of chocks? I have never read where measurement are included. Just that a boat had rolling chocks installed. Viewing many examples on boats on the hard, they vary in configurations/size.

As happy as I am with the ballast that I have mentioned numerous times on the forum, one wonders if installing a set of chocks would enhance the improved roll motion even more (cost being one consideration).
In speaking with a marine fiberglass repair/construction fellow in Wrangell AK, constructing chocks is a common enough project, in the same class as bulbous bow components , that a couple of days is all it would take to lay up a pair and install. Very tempting. Thoughts?
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Old 09-12-2017, 03:46 AM   #20
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I know which side my bread is buttered on ! (Irish expression). Meaning I know when I'm well off.
I thought THAT was a New York expression.
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