A few points:
-I'm not sure why, but the FB Bowline seems to have better weight distribution than the Bowline.
Odd conclusion: this peculiar knot puts a lot of knotting on one side
of the axis of tension; the Bowline is much better balanced.
-100% of the load is NOT placed on that 1 diameter turn.
That's because both legs are not going through that 1 diameter turn.
Even after setting the knot by pulling hard on the tail bight
(i.e., either/both tail & tail-side eye-leg), on loading the knot
the SPart straightens right into that 1dia turn -- there is no
off-loading of force to another part.
-I don't see how a 1 diameter turn is so horrible anyway, and they're practically unavoidable. For example, a trucker's hitch and a versatackle use 1 diameter turns. ...
An overhand knot has two 1-diameter turns in a small area, right? When testing knot strength using a machine, stopper knots are typically used at the ends to hold the rope to the machine. Those stopper knots must be stronger than than the knot being tested. I know of at least one test, involving testing Fisherman Bends, where the person was using overhand knots on the ends for rope connection to the machine.
For one thing, some cordage won't make 1dia turns readily
-- caving kernmantle ropes can be (even new) resistant to
bending even to 2 diameters(!). Lack of closure spells trouble
in security or just getting a knot tied. Now, if your cordage
doesn't suffer such stiffness, it's not a concern.
The 1dia turns of the Trucker's hitch are seeing less tension
in the line at that point. And for testing, rope is wrapped
several times around a capstan or pin or like structure before
it is knotted or clamped, so far as I know -- so that tail of
that securing is seeing only reduced force.
Now, in re
security (when slack/shaken), this knot seems less
vulnerable to loosening, as the 1dia turn doesn't so quickly
*unturn* (in my in-hand small nylon solid braid), and the tail
bight is being gripped by another turn of rope not loosening
with SPart feed.
(Hmmm, try crossing the tail --from knot as tied fully-- under
and out through the 1dia (now become 2) turn!? Gains
*balance*, IMO; loses some of that security; the 2dia turn
isn't greatly oriented. hmmmm)
--dl*
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