Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 17-12-2014, 23:19   #1
Registered User
 
david samuelson's Avatar

Join Date: Jul 2008
Location: Thailand, presently
Boat: S & S 43'
Posts: 97
Kevlar shrouds

Hi,
I am changing 2 X 20 meter Kevlar shrouds. The new ones measure 15 centimeters shorter than the old ones and are way too short to attach to the chain plates. I called Navtec and their reply was that this is normal they (the shrouds) need to be stretched before putting them on. They say a 5 ton load is needed. Is this normal?
Thanks for any info. David
__________________

__________________
david samuelson is offline   Reply With Quote
Old 18-12-2014, 02:51   #2
Registered User
 
Delancey's Avatar

Join Date: Oct 2011
Location: Miami, FL
Boat: sunk by irma
Posts: 3,462
Re: Kevlar shrouds

I'm inclined to take their word on it. Not sure why you are questioning it. Do you think Navtec is trying to trick you for some reason? Perhaps part of some elaborate joke? Sounds fun.
__________________

__________________
Delancey is offline   Reply With Quote
Old 18-12-2014, 04:02   #3
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Kevlar shrouds

Quote:
On the down side, the ends of a Kevlar shroud have to be finished professionally, and the lengths are not adjustable, so they must be measured correctly the first time. Also, while it may be hard to nick or cut the cover, it can happen. A shallow cut can be covered with tape as long as the fiber isn’t damaged, but if the fiber is damaged the whole shroud must be replaced. Beyond that, longevity is a hallmark of many of the Kevlar rigs Van Note has refitted, including some Gunboat 62s, the oldest boats in the Gunboat lineup. “They have Kevlar rigging, which we didn’t have to replace,” says Van Note. “They do require a serious inspection after four years, and we’re seeing a six- to eight-year lifetime depending on mileage.”

Kevlar can also be used on multihulls with carbon rigging. “We use Kevlar forestays and cap shrouds because they have a little stretch, which isn’t a bad thing,” says Johnstone. “It’s nice to have a little stretch on an all-carbon boat to absorb some of the loading you encounter in a sloppy leftover sea state.”
I don't know anything about kevlar except what I've read. But here is a statemeant from an article in Sail Magazine. Is Fiber Rigging the Best Choice for a Multihull? | Sail Magazine

With that, they may be pulling your leg, or Sail Mag. has a bad writer. You may have to goto terminators with lashings to make it work.

__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 18-12-2014, 05:29   #4
Moderator
 
HappyMdRSailor's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: North Mississippi
Boat: 48 Wauquiez Pilot Saloon-C22 Chrysler Sunpiper- 19 Potter-Preparing to cruise w/my girl
Posts: 5,980
Re: Kevlar shrouds

David,

Are they terminated with splices already???

Then the answer is "for sure I would"

A member 40South (Craig) has posted some recent info on synthetic rigging...

Synthetic Rigging
__________________
In the harsh marine environment, something is always in need of repair...

Mai Tai's fix everything...
HappyMdRSailor is offline   Reply With Quote
Old 18-12-2014, 05:32   #5
Moderator
 
HappyMdRSailor's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: North Mississippi
Boat: 48 Wauquiez Pilot Saloon-C22 Chrysler Sunpiper- 19 Potter-Preparing to cruise w/my girl
Posts: 5,980
Re: Kevlar shrouds

Quote:
Originally Posted by Delancey View Post
I'm inclined to take their word on it. Not sure why you are questioning it. Do you think Navtec is trying to trick you for some reason? Perhaps part of some elaborate joke? Sounds fun.
***Hey Marty***
There's this guy on the phone who says his shrouds are too short....
__________________
In the harsh marine environment, something is always in need of repair...

Mai Tai's fix everything...
HappyMdRSailor is offline   Reply With Quote
Old 18-12-2014, 19:56   #6
Registered User

Join Date: Mar 2011
Location: Southport CT
Boat: J/36
Posts: 377
Re: Kevlar shrouds

Imagine if the shrouds had been the "right" length for you to be able to install them, and then they had stretched 15cm once you started loading them while sailing !! If you are in Thailand, can you use elephants for a "taffy-pull" operation?

Seeing what sunlight did to our kevlar genoa (disintegration?) would give me pause about using it for shrouds unless it was REALLY well sheathed and made very few turns.
__________________
psk125 is offline   Reply With Quote
Old 26-12-2014, 00:19   #7
Registered User

Join Date: Aug 2014
Location: Australia
Boat: Simpson Slipstream 50 Catamaran
Posts: 32
Re: Kevlar shrouds

Yes it is normal. It is only that the rubber padding on the shrouds that needs to be stretched. It may look a bit to far apart but its not actually. They all comes like that. Loosen up everything and you will be fine. If needed use a halyard to help on the winch. The best thing is to use a wide strap up the mast. Remember to tighten up after some sailing.
A two man job.
__________________

__________________
sirkus is offline   Reply With Quote
Reply

Tags
shroud

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Kevlar Racing Mainsail cburger Classifieds Archive 3 14-07-2008 16:26
How to cut a Kevlar deck? Weyalan Construction, Maintenance & Refit 10 15-05-2008 16:20
Kevlar over fiberglass sneuman Construction, Maintenance & Refit 4 28-01-2007 23:44
Kevlar in the hull? Weyalan Construction, Maintenance & Refit 15 01-09-2006 13:51



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:54.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.