SailNet Community - View Single Post - Duncan Loop in lieu of eye splice or bowline?
View Single Post
  #1  
Old 04-05-2011
patrickstickler's Avatar
patrickstickler patrickstickler is offline
Rhumbunctious
 
Join Date: Dec 2008
Location: Espoo, Finland
Posts: 150
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
patrickstickler is on a distinguished road
Duncan Loop in lieu of eye splice or bowline?

When one does not have time to make a proper eye splice, common practice is to use a bowline; but, a bowline halves the strength of the line and is thus suboptimal, however convenient.

There is a popular fishing knot, called the duncan loop, which is purported to preserve 95% of the line strength, and I'm wondering if anyone has used, or has any opinions about its use in lieu of a splice, as it can be quickly tied without tools, and can even be used with a thimble to prevent chafe.

The key difference that I can see between a duncan loop and an eye splice or bowline is that the loop will almost surely constrict with use over time, and as such, under significant load it's really more of a bend than a loop, but if a thimble is used, that could be a non-issue.

Though that raises the question of whether a thimble might reduce the strength of the knot, and perhaps a perfectly round thimble might be better than the typical teardrop shape.

Here is one tied with 10mm line:



Given that it is as strong as an eye splice, and can be made more quickly than a splice and without tools, one might wonder why splice at all? Cosmetic arguments aside...
__________________
...
If a man speaks at sea where there is no woman to hear, is he still wrong?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

-
Cruising the Baltic in 'Merihiisi', a 1979 Westerly Berwick Ketch
Reply With Quote Share with Facebook