Hi all,
Some homemade, totally informal,superficial,trivial tests.
Ropes used:some 2,5 mm polyester nautical braided rope vs some 9mm... ehm...unknown material(nylon?PP?) braided rope.
Loading mode:the bare force of my arms(which are not very strong...).
Number of tests:not counted;casual and unknown.
After these promising premises, these are the results of my tests:
("failed" indicates that I was able to completely slip away the knot, "passed" indicates that I could not:possibile clarifications will be exposed case by case)
Lapp bend failed
Double Lapp bend 1 failed
Double Lapp bend 2 failed(*1)
Sheet bend failed(*2)
Double Sheet bend #1434 passed(*3)
Double Sheet bend #488 passed
"Tresse" Sheet bend passed
Simple Simon under failed
Simple Simon over failed
Simple Simon double(*4) failed
Zeppelin bend passed
Asymmetric Zeppelin bend(*5) passed
Lee Zep A1 structure bend version(*6) passed
Lee Zep A1 X srtucture bend version(*7) passed
(*1)On one occasion the thinner rope is oddly capsized in a way that I could do not slip it away.
(*2)Slipped away about 80% of the times, in other occasions I noticed some slippage without that I could do it slipping away,in other occasions I have not noticed any slippage;on one occasion I found in my hands the thicker rope straightened,with the thinner rope that formed a sort of double wrap hitch around it...
(*3)I was never able to completely slip it away, but in a couple of occasions I have actually noticed some slippage.
(*4)I tested the "standard" version: in reality can be performed four versions of this bend: over-over ("standard"), under-under, over-under, under-over.
(*5)
http://igkt.net/sm/index.php?topic=2159.msg15189#msg15189 (*6)The Lee Zep A1 Bowline is visible at the first pic in this post:
http://igkt.net/sm/index.php?topic=3908.msg27595#msg27595 ,
to obtain the bend I refer "cut" the eye of the loop,use the standing end of the loop as the standing end of the one link(and use the thicker rope for this link),and use the second leg of the loop as the standing end of the other link.
(*7)The Lee Zep A1 X Bowline is visible at the second pic in this post:
http://igkt.net/sm/index.php?topic=3908.msg27595#msg27595 ,
to obtain the bend I refer "cut" the eye of the loop,use the standing end of the loop as the standing end of the one link(and use the thicker rope for this link),and use the second leg of the loop as the standing end of the other link.
The diameter ratio between the two ropes is a bit extreme,but this was good for testing with my bare arms...
I think that all the bends tested, if tied using ropes of the same diameter,probably are more appreciable in terms of security than the Sheet Bend,or the Double Sheet bend(in whatever way is dressed),or the "Tresse" version of the Sheet bend.Regarding the bends that have failed these tests(but if my tests were worth something ...),surely remains interesting to test when (ie progressively increasing the ratio of the diameter of the two links) the use of these bends stops being interesting with respect of the use of the Sheet bends and the other bends that have passed the test (or rather: who might have passed a test better than my. ..).
Bye!