Reply
 
Thread Tools Display Modes
 
Old 11-26-2015, 10:23 AM   #1
Guru
 
City: Full Time Cruising East Coast
Country: USA
Vessel Name: Meridian
Vessel Model: Krogen-42
Join Date: Aug 2011
Posts: 755
Naiad fin protection

I'm looking for options on leading edge fin protection from crab pots, etc. for my stabilizers.
__________________
Advertisement

__________________
-------------------------
Terry
Meridian
KK-42097
meridian is offline   Reply With Quote
Old 11-26-2015, 10:30 AM   #2
Guru
 
djmarchand's Avatar
 
City: East Greenwich, RI
Country: USA
Vessel Name: Bella
Vessel Model: Mainship Pilot 34
Join Date: Aug 2012
Posts: 2,877
The sailboat designers have looked at this problem extensively. It takes at least a 30 degree angle on the fin to shed weeds, kelp, or crab pot warps. The only other way I can think of is to glass a sharp stainless steel strip onto the leading edge to cut them. Keeping it sharp enough will be a challenge, but a few minutes of a diver with a file every few months should do it.


David
__________________

djmarchand is offline   Reply With Quote
Old 11-26-2015, 08:52 PM   #3
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Country: USA
Join Date: Jan 2013
Posts: 3,187
We have "kelp cutters" on ours. It's a stainless triangle mounted to the hull just ahead of the fins. Really the only risk with the fins and crab traps is if the line gets wedges between the top of the fin and the hull. In most cases they just shed away, and the kelp cutters help protect against that last little risk that they get caught in the gap. The leading edge is sharpened so they in theory cut kelp, but I haven't had the opportunity to test that.
__________________
www.MVTanglewood.com
twistedtree is offline   Reply With Quote
Old 11-26-2015, 09:07 PM   #4
Guru
 
Insequent's Avatar
 
City: Brisbane
Country: Australia
Vessel Name: Insequent
Vessel Model: Ocean Alexander 50 Mk I
Join Date: Mar 2012
Posts: 1,425
I don't have anything sharp, just a block on the hull ahead of the fins to stop lines getting between the fin and the hull. I have only once had kelp on a fin, and just fished it off leaning over the side from the side deck. I would think stopping and reversing a short distance would also clear anything just wrapped over the leading edge.
Attached Thumbnails
Click image for larger version

Name:	Naiad Ext 7.jpg
Views:	74
Size:	87.4 KB
ID:	46859  
__________________
Brian
Insequent is offline   Reply With Quote
Old 11-26-2015, 09:26 PM   #5
Guru
 
windmist's Avatar
 
City: Port Orchard, WA
Country: USA
Vessel Name: Violet A
Vessel Model: Nordic Tug 42
Join Date: Mar 2008
Posts: 908
This is what have forward of the fins:
Attached Thumbnails
Click image for larger version

Name:	NT 42 021.jpg
Views:	74
Size:	154.3 KB
ID:	46860  
__________________
Ron

The five stages of life: Sailboats, Motorboats, Motor Homes, Nursing Home, Funeral Home.
windmist is offline   Reply With Quote
Old 11-27-2015, 11:20 AM   #6
Veteran Member
 
OkSkipper's Avatar


 
City: Anacortes, WA
Country: United States
Join Date: Sep 2008
Posts: 68
Here is a slight variation........

Click image for larger version

Name:	Stabilizers.jpg
Views:	84
Size:	117.5 KB
ID:	46864

Only once did we snag something that I recall. It was in the dead of night off the coast of Oregon. We think it was a crab pot line and buoy. It thumped the hull for about 15 minutes then stopped. Presumably, the line cutter had done its job. When we got to San Diego, we had a diver inspect the hull and stabilizer fin. He found nothing to report.
__________________
Peter Whiting, CPYB
Northwest Yachts
Seattle Yachts
OkSkipper is offline   Reply With Quote
Old 11-29-2015, 02:11 AM   #7
Senior Member
 
kapnd's Avatar
 
City: hawaii
Country: usa
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 293
This thread supports my theory that complicated systems onboard can only lead to more complications.
kapnd is offline   Reply With Quote
Old 11-29-2015, 08:22 AM   #8
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,361
As others have stated, we see no issues either. Removing kelp from fins is easy. Avoiding crab pots is normal and the few times where an errant line was picked up we have found the props pull them off the fans and the line cutters do their job. Not once have I had to dive down to remove stuff off the Wesmars.
sunchaser is offline   Reply With Quote
Old 11-29-2015, 10:23 AM   #9
Guru
 
Capt.Bill11's Avatar
 
City: Sarasota/Ft. Lauderdale
Country: USA
Join Date: Apr 2014
Posts: 5,422
Quote:
Originally Posted by kapnd View Post
This thread supports my theory that complicated systems onboard can only lead to more complications.
Fins are hardly complicated. And once you have them, or some other form of stabilization, you'll never want to be without it.
Capt.Bill11 is offline   Reply With Quote
Old 11-29-2015, 06:21 PM   #10
Senior Member
 
eagle419's Avatar
 
City: Sydney
Country: Australia
Join Date: Apr 2012
Posts: 214
Quote:
Originally Posted by kapnd View Post
This thread supports my theory that complicated systems onboard can only lead to more complications.
They're not complicated but yes, they do need servicing.

Active stabilisers weren't on my wish list to begin with, but having used them for a couple of years, they are now on my essential list.
Attached Thumbnails
Click image for larger version

Name:	DSC00343.jpg
Views:	58
Size:	80.9 KB
ID:	46943   Click image for larger version

Name:	DSC04390 (800x451) (2) (800x451).jpg
Views:	67
Size:	52.3 KB
ID:	46944   Click image for larger version

Name:	DSC02610 (640x361).jpg
Views:	52
Size:	174.3 KB
ID:	46945  
__________________
John
eagle419 is offline   Reply With Quote
Old 11-29-2015, 06:43 PM   #11
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Country: USA
Join Date: Jan 2013
Posts: 3,187
Quote:
Originally Posted by kapnd View Post
This thread supports my theory that complicated systems onboard can only lead to more complications.
True, but each of them also brings a set of benefits. Then you need to decide if the cost and complexity is worth it. By way of example, our boats have engines and gear boxes which are very complicated machines and require on-going maintenance. But clearly we all think the benefit is worth it.
__________________
www.MVTanglewood.com
twistedtree is offline   Reply With Quote
Old 11-29-2015, 06:44 PM   #12
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Country: USA
Join Date: Jan 2013
Posts: 3,187
Quote:
Originally Posted by eagle419 View Post
They're not complicated but yes, they do need servicing.

Active stabilisers weren't on my wish list to begin with, but having used them for a couple of years, they are now on my essential list.
That's the story I hear over, and over again. Once you's gone flat, you never go back.
__________________
www.MVTanglewood.com
twistedtree is offline   Reply With Quote
Old 11-29-2015, 06:54 PM   #13
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 5,729
Quote:
Originally Posted by Capt.Bill11 View Post
....And once you have them, or some other form of stabilization, you'll never want to be without it.
Quote:
Originally Posted by eagle419 View Post
...stabilizers weren't on my wish list to begin with, but having used them for a couple of years, they are now on my essential list.
Quote:
Originally Posted by twistedtree View Post
That's the story I hear over, and over again. Once you's gone flat, you never go back.
Larry M is offline   Reply With Quote
Old 11-29-2015, 07:31 PM   #14
Guru
 
N4712's Avatar
 
City: South FL
Country: U.S.A
Vessel Name: Oliver
Vessel Model: Nordhavn 47 Hull# 12
Join Date: Apr 2013
Posts: 3,613
Add me to the list, stabilizers to me aren't very complicated and are worth every penny.
__________________
Thanks, Oliver
M/V Oliver
Nordhavn 47 Hull #12
N4712 is offline   Reply With Quote
Old 11-29-2015, 10:30 PM   #15
Wannabe
 
Britannia's Avatar
 
City: SF Bay Area
Country: USA
Vessel Name: Stillwater
Vessel Model: Kadey-Krogen 54
Join Date: Dec 2014
Posts: 766
Britannia is offline   Reply With Quote
Old 12-01-2015, 01:30 PM   #16
Senior Member
 
City: Ft Lauderdale
Country: USA
Vessel Model: 120' Custom, Cat 3512's, 1750 HP ea.
Join Date: Nov 2013
Posts: 159
One thing to note on vessels with stabilzers, a little trick, when boat is hauled for service, once you have the fins on exact center, is to make a permanent and prominent mark on the hull (we weld a bead on alloy and steel hulls) at the trailing point of the fins. This will give you a permanent reference point. Later, wether in or out of the water, gives you the ability to mechanically center the fin to the mark, and then adjust your electronic sensors to re-zero in the event of fin movement on the shaft or sensor failure. This saves the necessity to re-haul for the adjustment. This also lets a diver check center in a matter of seconds, and can then be easily re adjusted.
__________________

BerettaRacer is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 12:52 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012