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The artillery loop [1] is a knot with a loop on the bight for non-critical purposes. The artillery loop must have the loop loaded or it will slip and contract easily. It is an inferior knot to the alpine butterfly knot, [2] possibly dangerously so, in that it can be yanked out of shape and turn into a running knot or noose.
The double bowline is one of the typical tie-in knots used in climbing, along with the figure eight follow through [3] [4] and the Yosemite bowline. [5] The advantage of the double bowline over the figure 8 is that it is easier to untie after being weighted in a fall, [3] [4] and so is used by sport climbers who take multiple lead falls and then have trouble untying their figure eights.
The result is slightly larger and more difficult to untie. It forms the first part of the surgeon's knot and both sides of a double fisherman's knot. According to The Ashley Book of Knots, "A double overhand knot tied in a cat-o'-nine-tails is termed a blood knot." [4] When weighted, it can be difficult to untie, especially when wet. [5] [6]
The bowline knot is thought to have been first mentioned in John Smith's 1627 work A Sea Grammar under the name Boling knot. Smith considered the knot to be strong and secure, saying, "The Boling knot is also so firmly made and fastened by the bridles into the cringles of the sails, they will break, or the sail split before it will slip."
Blood knot (barrel knot) – joins sections of monofilament nylon line while maintaining much of the line's inherent strength; Blood loop knot (dropper loop) – forms a loop which is off to the side of the line; Boa knot – binding knot; Boom hitch – attach a line to a fixed object like a pipe
The double harness bend is an unfinished Fisherman's knot (or even a Double fisherman's knot): the end needs to go through its own half hitch (twice) to form a (double) overhand knot. The double harness bend is an unfinished Blood knot: The half hitches need to take one or several turns around both ropes before going through the eye in the middle.
The discovery of all possible ways to tie a tie depends on a mathematical formulation of the act of tying a tie. In their papers (which are technical) and book (which is for a lay audience, apart from an appendix), the authors show that necktie knots are equivalent to persistent random walks on a triangular lattice, with some constraints on how the walks begin and end.
The bowline on a bight is a knot which makes a pair of fixed-size loops in the middle of a rope. Its advantage is that it is reasonably easy to untie after being exposed to load. It is one of the two tie-in knots that are being taught by the German Alpine Club (DAV), generally being considered secure. [1] [2] [3]