Splicing anchor rode - Page 5 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest Forums > Seamanship & Navigation
 Not a Member? 

Seamanship & Navigation Forum devoted to seamanship and navigation topics, including paper and electronic charting tools.


Reply
 
LinkBack Thread Tools
  #41  
Old 04-17-2009
artbyjody's Avatar
Senior Member
 
Join Date: Jan 2008
Location: Bellingham, PNW
Posts: 3,146
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
artbyjody is just really nice artbyjody is just really nice artbyjody is just really nice artbyjody is just really nice
Most failures would be just abrasion of the core loop around the shackle. If the shackle is suffering rust / corrosion etc - then it makes sense the weakest link is the weakest point that has the less amount of material (around the shackle). Arguments about the knot being the weakest link are only valid if the knot is one that easily becomes undone...
__________________
-- Jody

S/V "
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
" -
1983, Barberis Show 38! or
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.







Reply With Quote Share with Facebook
  #42  
Old 04-17-2009
pdqaltair's Avatar
Senior Member
 
Join Date: Nov 2008
Location: Deale, MD
Posts: 1,942
Thanks: 1
Thanked 12 Times in 12 Posts
Rep Power: 6
pdqaltair is on a distinguished road
Yes, the failure is inside the knot, and always in the same spot.

Quote:
Originally Posted by lancelot9898 View Post
It was my understanding that the failure was at the U bend and not at the knot itself. If that's the case then it doesn't matter as to the type of knot or splice being used. I always thought the failure would in fact be at the knot since most books mention various reduction in strength for various knots and how a splice is better.
I highly recommend, for anyone interested in knots, that they take some light line (less than 1/8"), tie opposing anchors in pairs, and start breaking them.

Note that differing line materials matter. Don't use cotton or binders twine - different rules apply because of differences in friction.

I used to make and market rock climbing equipment, and we spent many hours breaking stuff. Always educational.
__________________
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

"Well, I just climb up to them."

by Joe Brown, English rock climber




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #43  
Old 04-17-2009
Senior Member
 
Join Date: Dec 2008
Posts: 626
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 6
lancelot9898 is on a distinguished road
Quote:
Originally Posted by pdqaltair View Post
I highly recommend, for anyone interested in knots, that they take some light line (less than 1/8"), tie opposing anchors in pairs, and start breaking them.
.

I was considering taking a small diameter 3 strand line and comparring the back splice around that last chain length vs an eye splice without the metal thimble to determine which is better, however with the small diameter line I also need a small diameter chain length to get an accurate comparison. The weakest link will be the chain so to prevent chain breakage a larger diameter chain has to be used. If I run out of boat projects I'll get two short links of 3/8 chain and tie one chain using 3/16 3 strand nylon(1200 pound breaking)with the back splice and the other chain with the eye splice. The next step will be to pull the two chains apart and see which end breaks. A strain gage would be nice to see how close to the 1200 pounds is achieved.

Last edited by lancelot9898; 04-18-2009 at 11:03 AM.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
More splicing advice, please Quickstep192 Gear & Maintenance 7 05-29-2008 07:13 AM
Splicing Book / Tools 1970Columbia34 Gear & Maintenance 16 04-24-2007 11:50 PM
splicing wire calamityjane Seamanship & Navigation 11 09-13-2004 03:42 AM
chain splicing sailorman10 Gear & Maintenance 7 01-25-2003 02:42 AM
Splicing Sta Set X line jsfletch Gear & Maintenance 2 06-25-2001 07:56 AM


All times are GMT -4. The time now is 11:57 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012