Splicing loops in Amsteel question and Improved Soft Shackle

[joe_guilbeau]

Interesting reading here, I have come across destructive testing done by a qualified testing facility.

Using 1/8" Amsteel with an end splice with full bury (9-inches) and with Short Bury (5-inches)

Amsteel 1/8" Average Strength = 2,300-lbs
Amsteel 1/8" Minimum Strength = 2,500-lbs
See Sampson Rope Specification Chart below:
http://www.samsonrope.com/Pages/Prod...?ProductID=872

Short synopsis of the testing:
Full bury withstood 4,090-lbs. (See results from Test Bracket-B)
Short bury withstood 3,066-lbs (See results from Test Bracket-E)
See test brackets result below:
http://www.chicagoyachtrigging.com/w...st-bracket.jpg


And the Videos
Pick and choose from below website:
https://www.youtube.com/channel/UC38...BFsg6xg/videos

Finally, if I am not mistaken, it looks as if the 1/8" Amsteel with a full 9" bury withstood 4,484???

[joe_guilbeau]

Additional reading on Amsteel and shackle strength with the aforementioned improved shackle being tested.

From Beth and Evans who happen to be sailing folk, here is their story as they tell it.
http://www.bethandevans.com/beth_evans.htm

More to the point of this post is their testing of various aspects of Dyneema, along with other rope. Just browse...
http://www.bethandevans.com/load.htm

[vtaflyer]

Thanks for the link on all of the testing. I met Beth and Evans a few years ago on one of their stops, and they (esp Evans) certainly do their research and homework!

[mophead]

Thanks for the links. Especially the one on loads for different ropes. A few of us experienced exactly what they say about the sheet bend sometime holding and sometimes slipping. Good to know I might not be going crazy.

[gmcttr]

Interesting reading here, I have come across destructive testing done by a qualified testing facility....

Excellent...thanks!

[joe_guilbeau]

Whoopie Sling

By the way, the Sliding Loop Sling (otherwise known as a Whoopie Sling) and shown in the chart below on F-2 Bracket withstood 2,632-lbs.
http://www.chicagoyachtrigging.com/w...st-bracket.jpg

One must keep in mind that these tests were done with 1/8" Amsteel and splices were made with best practices, that means tapered buries, and tightly milking etc... mine would probably give out at 32%

For ease of viewing here is the actual Whoopie Sling exceeding expectations...
http://www.chicagoyachtrigging.com/1...liding-splice/

[gmcttr]

For the record...at least one of the test reports stated they were testing 1/8″ Endura 12, which while it is also dyneema, it is not Amsteel Blue. If Amsteel Blue had been used, I expect the comparative results for different splices/knots would be the same but the numbers would vary somewhat. ,

[URZED]

I would do a locked Brummel on one end and larks head that to your suspensions larks head. The other end I would put it through the Larks head than make a whoopie sling. Find your adjustment point and lock the whoopie in place than bury the end so it looks nice I would use some dynaglide instead to make it lighter and smaller to pack.

Have fun with it!!!!!

[joe_guilbeau]

I'm not the one that designed or tested it, I just went looking for stronger stopper knots and found the information at the link provided. This link describes how he did the testing.
http://www.bethandevans.com/load.htm

Geeze, I totally passed over this link that you posted, pays to read eh! I say this because I came across Beth and Evans load testing page while doing searches for splice testing of 1/8" Amsteel. It looks as though I was about a month behind you...doh!

I especially like the Soft Shackle info presented in that article.

Back to the original post, you mentioned a loop in the main line... I am sure you have considered a Short Bury end-splice for the loop, and then milking that up into the Mail line, is there not enough real estate in the Main line to get this done?

You might have to use 7/64" Amsteel for the end-splice loop and, say a 6" bury for the loop piece.

The smaller diameter 7/64" will give you (theoretical data here...) 14/64ths diameter for the bury of the end splice loop (my math makes that to be 7/32") which is pretty close to what you might want. You should be able to milk that up into the Main Line if it is empty and not containing another bury in that spot, 7"-8" would be all the real estate required.