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Old 09-15-2015, 11:17 AM   #21
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Several years ago I was walking the docks in Skidegate, Haida Gwaii, where I saw a boat like my C&L 44 set up with paravanes. The attachment of the poles and control posts was to the hull at deck level and the mast was positioned over the back wall of the main cabin. There was no outward sign of reinforcing, but of course the inside may have been substantially beefed up.

Just made me think you can add paravanes to almost any design if you do your homework on stress points.
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Old 09-15-2015, 11:51 AM   #22
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Forgot to add, the poles go thru the galley roof, thru the deck, then are welded to the stringers in the hull.

Wow. That's stout.

I really need to get an expert on a boat like mine so he/she can walk around and look at the various mounting possibilities. I just don't know enough at this point. Don't know the downward force on the mast, don't know how strong the fiberglass is at various points on my boat, don't know if I can get by without compression posts. Basically, I don't know squat!
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Old 09-15-2015, 11:57 AM   #23
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And don't forget to add that you will need to run your generator continuously to power the SeaKeeper not to mention it takes a very long time for the gyro to wind up (per reports that I've read). Personally, I would not want to have my generator running all the time. I lean more to the "green" side of things and that's why I think paravanes are the way to go for stabilization.
Good points. And of course any system has its pros and cons.

But many powerboats these days are running their gensets almost 24/7. And paravanes just aren't practical for shallow water running like the ICW. And then there's the bridge thing.

I just think for most coastal cruisers paravanes aren't very practical.

Bu as always, YMMV.
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Old 09-15-2015, 12:55 PM   #24
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Many of the commercial trawler in the PNW have them so their are plenty examples to look at. Most have been added after, so the addition suport is on the outside. Could run a new extorior support mainly using the walls which you could also added exterior support as well. Maybe be the boat already has a mast foot in its original design of sails are an option.

You might also talk to a sail boat rigger as they have some basic under standing ans ideas. I already have the poles, plates and fish. We took aAlaska cruise, and many made poles out of natural straight pine poles, hand most of the support wad chain plates and wire stays like sail boats, which I thought was interesting. So walk the docks.
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Old 09-15-2015, 01:47 PM   #25
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Has anyone ever mounted a pair of hull shaped wings that fold down under water when you need roll reduction? Something like stabilizer wings but could fold up against the hull side when not in use.

Since you don't have the leverage of the boom length, that might work easier on boat that won't work with paravanes.
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Old 09-15-2015, 02:03 PM   #26
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Forgot the drawing of my boat with a mast. Mast is too big in this drawing. Maybe a 25' mast would look better.


Attachment 44561

that boom is way to high above the coach roof.

why
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Old 09-15-2015, 02:14 PM   #27
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I have seen wings on sail boat keels. Another idea is to just hang the fish from a cleat with out poles. We were mored on lake union, Seattle, close to the speed test zone and waked, so I hung roll stopper cones from the mid cleats, which reduced the roll by at least 50%.

Also the angles of the suppot and cable lines is very important. The larger the angle to more the stress. Heavy load riggers have to know angles vs stress loads.
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Old 09-15-2015, 02:22 PM   #28
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that boom is way to high above the coach roof.

why

Not sure why the boom is so high. That was drawn by the Island Packet folks. Maybe to clear stuff mounted in the PH roof?
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Old 09-15-2015, 02:26 PM   #29
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that boom is way to high above the coach roof.

why

Agree 100%
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Old 09-15-2015, 02:27 PM   #30
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Have you contacted Island Packet? They may assist as they likely have a vested interest in their product.

The compression post or arch should be a no-brainer for them.
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Old 09-15-2015, 02:28 PM   #31
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that boom is way to high above the coach roof.

why
I'm guessing height/liability reasons as there is a seating area between the mast and pilothouse.
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Old 09-15-2015, 02:37 PM   #32
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Good points. And of course any system has its pros and cons.

But many powerboats these days are running their gensets almost 24/7. And paravanes just aren't practical for shallow water running like the ICW. And then there's the bridge thing.

I just think for most coastal cruisers paravanes aren't very practical.

Bu as always, YMMV.
I've never run the ICW, so please forgive my ignorance, but is there really that much need for stabilization when running the ditch? You're pretty well protected the majority of the time, right? Seems like if you had vanes, you'd just stow them for the ICW.
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Old 09-15-2015, 02:53 PM   #33
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I've never run the ICW, so please forgive my ignorance, but is there really that much need for stabilization when running the ditch? You're pretty well protected the majority of the time, right? Seems like if you had vanes, you'd just stow them for the ICW.
Exactly what I was thinking!
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Old 09-15-2015, 03:02 PM   #34
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I've never run the ICW, so please forgive my ignorance, but is there really that much need for stabilization when running the ditch? You're pretty well protected the majority of the time, right? Seems like if you had vanes, you'd just stow them for the ICW.
Active stabilizers come in very handy in the IWC for dealing with wakes. I've lost track of how many boats I've called to arrange a slow pass and they'll come back to me with "Don't worry about it I've got my stabilizers on. So roll on by at speed.". And there are areas along the ICW and areas getting to or from the ICW that involve open water that can be shallow.

Plus paravanes add significantly to your air draft.

Don't get me wrong, they work and they are a good option for many. I'm just not sold on them as the best option for people who are going to spend the majority of their time cruising the ICW and other shallow waters.

And as I mentioned before, IMO a boat with active stabilizers is an easier sell at resale. And I think active stabilizers add more value to a boat.

But hey, what do I know? I've been wrong before. :-)
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Old 09-15-2015, 03:17 PM   #35
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I've never run the ICW, so please forgive my ignorance, but is there really that much need for stabilization when running the ditch? You're pretty well protected the majority of the time, right? Seems like if you had vanes, you'd just stow them for the ICW.

Oh, yeah, I wouldn't use them in the ICW. Just out in open water.

We did a Gulf of Mexico crossing from Clearwater to Panama City this summer, about 30 hours, and after that I realized for longer passages I needed some stabilization to make it comfortable. I really liked being out in open water and making the overnight passage and want to do more, but not with 20 degree rolls.
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Old 09-15-2015, 03:20 PM   #36
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Active stabilizers come in very handy in the IWC for dealing with wakes. I've lost track of how many boats I've called to arrange a slow pass and they'll come back to me with "Don't worry about it I've got my stabilizers on. So roll on by at speed.". And there are areas along the ICW and areas getting to or from the ICW that involve open water that can be shallow.

Plus paravanes add significantly to your air draft.

Don't get me wrong, they work and they are a good option for many. I'm just not sold on them as the best option for people who are going to spend the majority of their time cruising the ICW and other shallow waters.

And as I mentioned before, IMO a boat with active stabilizers is an easier sell at resale. And I think active stabilizers add more value to a boat.

But hey, what do I know? I've been wrong before. :-)

I agree with you on the active fins, and my next boat will have probably have them, but for this boat it doesn't make sense.
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Old 09-15-2015, 03:21 PM   #37
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Active stabilizers come in very handy in the IWC for dealing with wakes. I've lost track of how many boats I've called to arrange a slow pass and they'll come back to me with "Don't worry about it I've got my stabilizers on. So roll on by at speed.". And there are areas along the ICW and areas getting to or from the ICW that involve open water that can be shallow.
Hm... I hadn't considered wakes. That makes sense.

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Oh, yeah, I wouldn't use them in the ICW. Just out in open water.

We did a Gulf of Mexico crossing from Clearwater to Panama City this summer, about 30 hours, and after that I realized for longer passages I needed some stabilization to make it comfortable. I really liked being out in open water and making the overnight passage and want to do more, but not with 20 degree rolls.
Completely understandable. 20 Degree rolls are fun for about 15 minutes, then it just becomes a chore.
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Old 09-15-2015, 03:22 PM   #38
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Paravane install

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Have you contacted Island Packet? They may assist as they likely have a vested interest in their product.

The compression post or arch should be a no-brainer for them.

Yeah you're probably right. I did talked to them about adding a sail but it was too much money IMO.
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Old 09-15-2015, 04:06 PM   #39
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Yeah you're probably right. I did talked to then about adding a sail but it was too much money IMO.
Do you quotes for the paravanes yet?
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Old 09-15-2015, 04:11 PM   #40
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Do you quotes for the paravanes yet?

Richard on Dauntless got his done for around $10000 so I'm shooting for that, but he already had a mast so mine could be more expensive.
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