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Old 05-05-2014, 05:52 PM   #41
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...I would be interested in the experiences of those here in terms of loss of speed using them. If you're going 15 knots then .5 isn't a big deal but if you're going 7 knots I would hope paravanes are not impacting speed that much.
I have no idea on active stabilizers but we trade-off some where between 1/2 to 3/4 of a knot @ ~7 knots with the fish in the water. We have a couple choices to change that, but everything is a compromise.

We can change the angle that the fish travels through the water which can add or subtract resistance or go with a smaller fish. We are running fish that are designed for 50-60' vessel for increase comfort. So far the set up has worked for us and is worth the trade off/compromise.
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Old 05-05-2014, 07:44 PM   #42
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I have no idea on active stabilizers but we trade-off some where between 1/2 to 3/4 of a knot @ ~7 knots with the fish in the water. We have a couple choices to change that, but everything is a compromise.

We can change the angle that the fish travels through the water which can add or subtract resistance or go with a smaller fish. We are running fish that are designed for 50-60' vessel for increase comfort. So far the set up has worked for us and is worth the trade off/compromise.
That's what I'd seen as typical. So 7-10% of your speed at 7 knots, but your fuel efficiency is so good anyway, doesn't much matter. Only time it would be an issue would be strong currents against you.

On stabilizers, what we've seen has been negligible. What I've read has been 0.1 knot.
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Old 05-05-2014, 08:01 PM   #43
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Larry M,
I see you attach in the center hole for the fish. Have you tried the fwd hole? It's possible the fish will work as well w a little less angle of attack and greatly reduce the load on the rigging.

Also running stranded SS wire should reduce the drag even further. Some skippers I ment in Prince Rupert like chain the best but chain must be very high drag. Metal (thin) fish wings should reduce drag and the "fuselage" of the fish could be modified into a more streamlined shape. Most are very blunt. You may be able to lower your drag to only loose 1/4 to 1/3 of a knot.
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Old 05-05-2014, 08:34 PM   #44
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I'm number of things:

I love the amsteel blue. it has no stretch and I hear virtually no noise.

I followed Larry's advice and got the Stano Enterprise fish. not only do they seem perfect for this boat, but me not knowing any better I just throw in the water at full speed, they do once skip and then dive right down.

I just finished 36 hours with them and the one problem I had was caused by me.

my Fish are only running about 13 feet below water.
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Old 05-05-2014, 08:40 PM   #45
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I like the amsteel also I put a rubber muffler mount in the line and that cut out the vibrations. I run my fish about 13 feet under water and never have them come close the surface. About 0.5 knot loss of speed also is noted.
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Old 05-05-2014, 08:51 PM   #46
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I can hear and feel some low level vibration but it doesn't bother me and I don't think it's that noticeable.

I do lose about half a knot.

I too retrieve them by hand, but I'm thinking about system with a little hand winch.
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Old 05-05-2014, 08:55 PM   #47
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I have a question, really out of curiosity.

When all is said and done with your various paravanes, counting all costs, how much are they costing you? I'm getting the impression that by the time everything is added up it's more than I initially thought.

And how long before repairs or replacement typically?
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Old 05-05-2014, 09:16 PM   #48
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...On stabilizers, what we've seen has been negligible. What I've read has been 0.1 knot.
That's very good efficiency. Is that for a FD recreational vessel?
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Old 05-05-2014, 09:18 PM   #49
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I have a question, really out of curiosity.

When all is said and done with your various paravanes, counting all costs, how much are they costing you? I'm getting the impression that by the time everything is added up it's more than I initially thought.

And how long before repairs or replacement typically?
In over 12000 miles with the fish in the water we have less than $600 in replacement parts and servicing other than painting the poles but that's optional.
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Old 05-05-2014, 09:23 PM   #50
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Larry M,
I see you attach in the center hole for the fish. Have you tried the fwd hole? It's possible the fish will work as well w a little less angle of attack and greatly reduce the load on the rigging.

Eric: If I reduce the angle, less downward force so, I sacrifice comfort.

Also running stranded SS wire should reduce the drag even further. Some skippers I ment in Prince Rupert like chain the best but chain must be very high drag. Metal (thin) fish wings should reduce drag and the "fuselage" of the fish could be modified into a more streamlined shape. Most are very blunt. You may be able to lower your drag to only loose 1/4 to 1/3 of a knot.
I only have 4' of chain and that's to help lifting the fish in and out. Richard said he looses .5 knots with no chain. It's all a compromise.
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Old 05-05-2014, 09:24 PM   #51
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In over 12000 miles with the fish in the water we have less than $600 in replacement parts and servicing other than painting the poles but that's optional.
What did they cost initially?
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Old 05-05-2014, 09:31 PM   #52
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I think you'd lose more speed with a couple of barnacles than a bit of chain. I love Amsteel, I replaced both wire ropes on my big and small winches with it, no more rust, jaggers or sharp swages from the wire - it got recycled.
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Old 05-05-2014, 09:31 PM   #53
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They were on Hobo when we bought her. We were told 12K. We had estimates of 10-15K when we were looking at another boat in the PNW. We had friends that had them installed last year and they were a tad under 15K without painting. Richard posted 10K for his in Ft Lauderdale last month.
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Old 05-05-2014, 09:32 PM   #54
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If built well I spend very little on them and it depends on your boat. I have a steel boat and was will to do the design and work my self. I will admit it I was luck with the first design. Way cheaper then active fin it would have cost more then my boat to put those in.
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Old 05-05-2014, 09:35 PM   #55
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The hardware is not that expensive overall.
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Old 05-05-2014, 09:37 PM   #56
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That's very good efficiency. Is that for a FD recreational vessel?
No, semi-displacement or semi-planing or whatever term one is willing to accept for the day.

That's what I've read in discussions on stabilizers in general.
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Old 05-05-2014, 09:49 PM   #57
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The hardware is not that expensive overall.
You're right. A 20' piece of 2" schedule 80 aluminum is less than $175. 1/4" SS wire and a bunch of shackles and thimbles? Our fish, which are commercially available, are less than $200/each. Design is important particularly on wood or fiberglass boats but that's another post.
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Old 05-08-2014, 08:05 PM   #58
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Design is critical.

Mine are designed do that the weakest part is the pole, as it's the cheapest to replace.

And it is, but I'll leave that fit a different thread.

The amsteel is great in that I really have little noise.
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Old 05-20-2014, 01:54 AM   #59
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Stumbled across this video and thought others might learn from it too.

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Old 05-20-2014, 09:37 AM   #60
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While i don't have them or even a boat worthy of stabilizers...

I would think that the .5 knt that it 'costs' in speed would have been lost anyhow due to slowing and tacking.

My concern would be snagging something or running them into the ground. when deployed you, for practical purposes basically have a 15' draft, 50'+ beam.
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