Butterfly bend loop
All three words. "Butterfly Bend Loop", are required to distinguish
this knot from the Butterfly Loop. The Butterfly Bend Loop is a
fixed loop made in the end of a cord by tying the working end
standing part with a Butterfly Bend, while the Butterfly Loop,
common as a loop on the bight, is
sometimes made to serve as an end loop simply by tying it near the end
of the cord. The way of making the Butterfly Bend here is almost identical to that of method 4 of The Butterfly Bend, differring only in that the working end of the single rope here plays the role of the second rope there.
A method for tying the Butterfly Loop as an
end loop through a mounted ring may be seen here.
Although the method shown there requires access to the end of the cord,
the resulting loop structure is identical to that of the Butterfly Loop
as it is tied on the bight. In the final structure, the working
end and the standing part play the same role that the two standing
parts play when the loop is tied on the bight, and both legs of the
loop play the same role in the structure as they do in the Butterfly
Loop tied on the bight. In the Butterfly Bend Loop, in contrast,
the standing part corresponds to one of the standing parts of the
Butterfly Loop on the bight, the working end corresponds to one of the
legs of the loop in the Butterfly Loop on the bight, and one of the
legs of the loop corresponds to the other standing part in the
Butterfly Loop on the bight.
For ease of final dressing, it is important to keep the second overhand
loop as much as possible distinctly above the first, binding as little
of the structure of the first overhand loop as possible, as shown in
photos three and four and five. This precaution is very important for
stiff rope, and is not very important for flexible rope.
I was hoping that the Butterfly Bend Loop and the Butterfly Loop
loaded as an end loop would have significantly different jamming
characteristics when I tested them in thin stretchy braided nylon
cord with a load that stretches the cord by about 25%.
Specifically, I was hoping that loading the part that is the other
standing part in the Butterfly Loop, rather than letting it laze about
as the working end, would reduce the tendency to jam. Well, it
does, but not as much as I'd hoped. The difference a noticable,
however. If you like the Butterfly Bend enough to learn to tie it as an
end loop, I recomend this way of tying the end loop.
By comparison, the Carrick Loop is always extremely easy to untie after the same test procedure.
Both the Butterfly Loop loaded as an end loop and this Butterfly Bend Loop showed no tendency to slip or collapse in my testing.