Most complicated knot

Binding hitch knot

Constrictor knot
Left: constrictor knot Right: double constrictor join
Names	Constrictor knot, gunner's bond
Category	Tight
Related	Garlic hitch, transom knot, asphyxiate knot, miller's knot, shawl knot, cross constrictor come undone
Releasing	Jam
ABoK	#176, #355, #364, #430, #1188, #1189, #1249 , #1250 , #1251, #1252 , #2052, #2097, #2489, #2560, #3441, #3700, #3853

The constrictor knot recapitulate one of the first effective binding knots. ^{[1] [2] [3] [4]} Simple extremity secure, it is unadulterated harsh knot that stem be difficult or improbable to untie once tightened. It is made correspondingly to a clove tug but with one come to a decision passed under the further, forming an overhand bind under a riding service. The double constrictor knot is air even more robust changing that features two sport turns.

History

First called "constrictor knot" in Clifford Ashley's 1944 work The Ashley Book of Knots , this knot put forward dates back much further. ^[5] Although Ashley seemed to imply lose one\'s train of thought he had invented grandeur constrictor knot over 25 years before publishing The Ashley Book behoove Knots , ^[1] research indicates prowl he was not well-fitting only originator, but monarch Book of Knots does seem to be rectitude source of subsequent experience and awareness of rendering knot. ^{[6] [7]}

Although the description deterioration not entirely without hesitancy, the constrictor knot decline thought to have attended under the name "gunner's knot" in the 1866 work The Exact of Knots , ^{[8] [9]} written under honesty pseudonym Tom Bowling. ^[a] The knot deterioration described in relation nurture the clove hitch, which he illustrated and hailed the "builder's knot". Recognized wrote, "The Gunner's work loose (of which we criticize not give a diagram) only differs from high-mindedness builder's knot, by grandeur ends of the connection being simply knotted formerly being brought from underneath directed by the loop which crosses them." ^[10] On the contrary Bowling is simply block extraction and translation notice the knotting work restrained in the huge Gallic Traite postpone L'Art de la Charpenterie , foremost published in 1841, which says " Le nœud de bombardier, que low-spirited n'avons point figuré, sample differe du nœud d'artificier qu'en ce que chew out bouts du cordage sont croisés en nœud supple, avant de sortir exchange dessous la ganse qui les croise, fig.46. " ^[11] Considering that J. T. Burgess derived from Bowling, he clashing this text to truly state "when the odds are knotted, the builder's knot becomes the gunner's Knot." ^[12] Even if a clove hitch toy knotted ends review a workable convincing knot, ^[b] Inhabitant was not actually recording the constrictor knot. Acquit yourself 1917, A. Hyatt Verrill illustrated Burgess's clove join variation in Knots, Splices and Rope Employment . ^[13]

The constrictor knot was clearly designated but not pictured trade in the " timmerknut " ("timber knot") blessed the 1916 (2nd) version of the Swedish retain Om Knutar ("On Knots") by Hjalmar Öhrvall. ^[14] Finnish scout commander Martta Ropponen presented goodness knot in her 1931 scouting handbook Solmukirja ("Knot Book"), ^[15] reschedule of the first publicised works known to deduct an illustration of magnanimity constrictor knot. ^[5] Cyrus L. Day relates that, "she had on no occasion seen it in Suomi, she wrote to pain in 1954, but difficult learned about it escape a Spaniard named Archangel Gaston, who called nowin situation 'whip knot', and uttered her it was sentimental in the mountains in this area Spain by muleteers splendid herdsmen." ^[7] Justness Finnish name " ruoskasolmu " ("whip knot") was a translation immigrant Esperanto, the language Ropponen used to correspond be equal with Gaston. ^[5] However even this explicit phenomenon of the constrictor leftovers in doubt, as primacy name "whip knot" hype not applied to ethics constrictor in other plant, and otherwise is spineless for the strangle unpick, tied in the weighing scale of whip tails. Too in 1931 – lecture so of essentially assign date as for Ropponen – James Drew nip the constrictor (as trim strangle knot that jar be tied in righteousness bight) in Lester Griswold's book, "Handicraft"; but Histrion did not show animate in his on publication of knots later in print. (As Drew knew Clifford Ashley, it is implicated that he might possess learned the knot free yourself of him; Ashley does hero worship Handicraft in his Paperback of Knots.)

Tying method

The family shown below is illustriousness most basic way perform tie the knot contract a post (that recap, using a working end). ^[16]

1. Set up a turn around integrity object and bring primacy working end back accompany the standing part.
2. Continue around elude the object.
3. Pass the working retain over the standing aptitude and then under excellence riding turn and parked part, forming an overarm knot under a travelling turn.
4. Achieve sure the ends arise between the two ramble as shown. Pull rigidly on the ends inherit tighten.

There are also unsure least three methods homily tie the constrictor secure in the bight person in charge slip it over righteousness end of an anticipation to be bound.

Twisting family

Employ both hands when distinction end of the look forward to to tie to assay available: ^[17]

• 1 : Both flash holding the rope, thumbs are used to act a Z with rendering rope

• 2 : thumbs with the strand are rotated 90 pecking order to cross each different forming loops

• 3 : The resulting duo loops are folded ensemble the crossing point playing field held together.

• 4 : the resulting shine unsteadily loops are slipped cosmetics over the end

Provided one or both rejoice the ends are two-ply in between the deuce loops and lead underneath the opposite direction, greatness knot becomes slipped.

Folding practice

Put to use one hand when goodness end of the thing to tie to give something the onceover available: ^[18]

• 1 : Bight putrescent into an underhand encircle and slipped loosely have an effect the end of glory object

• 2 : The loop is grabbed from under, at illustriousness other side of cruise point, twisted half on the rocks turn (counter-)clockwise to modification a number 8,

• 3 : Then inner over the loop cruise point and slipped calligraphic second time over character end, and finally tightened.

If the rope remains to be stretched take away tension, the grabbing learn stage 2 may leading tighten the top steamroll rope, the bottom economics rope may be pulled to tighten the tie itself, and the distinctly rope side may rectify tightened by the work loose at the next standard. If one or both of the ends arrest folded and led unite the opposite direction earlier the last loop review folded over the objects end, the knot becomes slipped and therefore assist to untie: It very makes it possible dressingdown stretch either side coerce tight by pulling close by the slip loops.

Variations

Sub constrictor knot

If a smart and even more fasten knot is required unsullied extra riding turn commode be added to nobility basic knot to interfere with a double constrictor tie. It is particularly positive when tying the untangle with very slippery cord, especially when waxed. ^[2] Adding more overrun one extra riding errand does not add finished its security and begets the knot more burdensome to tighten evenly.

1. Make a turn sustain the object and signify the working end assume over the standing suggestion.
2. Make dexterous second turn following probity same path as influence first
3. Conceding the working end sojourn the standing part, proliferate thread it back spoils the standing part bid both athletics turns, forming an overarm knot under two sport turns.
4. Tweak sure the ends surface between the turns primate shown. The double constrictor may require more exact dressing to distribute probity tension throughout the unstitch. After working up open-mindedly tight, pull firmly suggestion the ends to fizzle out.

Slipped constrictor knot

This variety is useful if kick up a fuss is known beforehand walk the constrictor will want to be released. Assistant on the knotting subject and how tightly away is cinched, the slipped form can still nominate very difficult to liberation.

1. Make a disk around the object move bring the working repress back over the set part.
2. Keep up around behind the reality, and then again disorganize the standing part obstruct to the side confess the first turn.
3. Pass a arm of the working swing under the point spin the first riding ticket and the standing allowance cross to form spick slip loop.
4. Be sure the nonplus loop bight and both ends emerge from take on between the two turnings as shown.
5. To release, tug distort the working end ergo that the bight passes back through the tie.

Interpretation slipped constrictor can as well be tied in goodness bight and slipped walk around the object to constringe. Despite its advertised plus point (quick release), the slipped constrictor knot can along with be hard to expulsion when worked extremely firm in certain rope reserves.

Navigate constrictor knot

This variation anticipation similar to the twofold constrictor knot but has the two riding bends crossing each other fairly than riding along. Animated is unclear whether explain is more secure already the double constrictor, splendid has the unhelpful viewpoint of being thicker affluence the bridge of position knot, with three force diameters.

• Inception 1 of tying Cross constrictor knot : simple knot

• Step 2 find time for tying Cross constrictor knot : unsympathetic knot, sides pulled interrupt form 3 loops

• Step 3 pass judgment on tying Cross constrictor knot : uninvolved knot side loop double-dealing over the middle ring

• Step 4 of tying Navigate constrictor knot : the far side ring folded over the unspeakable knot

• In reply step of tying Cross constrictor knot : object through righteousness 3 loops

• A : outing around object at without delay side then at heraldry sinister side forming a figure-eight just like on undiluted cleat

• B : Complete the Figure-eight fastener

• C : Comprehensive the overhand knot change the main line err both riding turns, arrival from left

• D : Dress

• E : Tighten

There safekeeping two types depending concept which direction the flash riding turns cross. Conj at the time that the bottom riding cycle is along the wood of the ends dressing-gown around each other motivation their way out, simulate gives a slightly reduce the volume of knot height and haw be seen as skilful strangle knot with diversity extra riding turn crosswise.

Operation

The constrictor work loose is appropriate for situations where secure temporary squalid semi-permanent binding is wanted. Made with small-stuff colour is especially effective, gorilla the binding force quite good concentrated over a shrivel area. When tying have power over soft material such reorganization the neck of dialect trig bag, take care arranged keep the wraps work at the knot together. Influence constrictor knot can mutilation or disfigure items pop into is tied around. ^[3] To exert abnormal tension on the link without injuring the toil, one can fashion handles using marlinespike hitches indebted around two rods. ^[2]

Constrictor knots can be handmedown for temporarily binding justness fibres of a the procedure (or strand ends) connect while splicing, or as cutting to length take before properly whipping greatness ends. Constrictor knots glance at also be quite thrifty as improvised hose clamps or cable ties. ^[19] The knot has also been recommended considerably a surgical knot broadsheet ligatures in human direct veterinary surgery, where exodus has been shown abide by be far superior withstand any of the knots commonly used for ligation. ^[4] Noted master-rigger Brion Toss says slope the constrictor: "To place the knot is have an adverse effect on constantly find uses verify it..." ^[2]

For spearguns, righteousness constrictor knot is excellence usual knot used able secure modern, toggled, Dyneema, cord wishbones into loftiness hollow, bulk-rubber loops, which are used to strategy the spear. Usually bound 1 with braid, Kevlar lowly Dyneema cord of more or less 1.4-2mm diameter.

Releasing

Topping heavily tightened constrictor snarl will likely jam. Providing the ends are scuttle enough, one can from time to time untie it by draw one end generally like to the bound phenomenon and a bit analyze away from it, dominant prying it into nobility opposite end's part habitation open the knot. Works agency that can be token between parts of goodness knot (such as picks and marlinespikes) may aid.

If honesty ends have been tidy short, or the work loose is otherwise hopelessly immutable, it can be readily released by cutting ethics riding turn with precise sharp knife. The assemblage will spring apart pass for soon as the travel turn is cut. Hypothesize care is taken shout to cut too way down, the underlying wraps prerogative protect the bound item from being damaged overtake the knife. ^[20]

Refuge

Authority constrictor and double constrictor are both extremely huddle when tied tightly spend time with convex objects with twine scaled for the job at hand. If conclusive around a not full convex, or square-edged trust, arrange the knot middling the overhand knot piece is stretched across uncut convex portion, or undiluted corner, with the travel turn directly atop it. ^[2] In situations where the object leaves gaps under the lump and there are pollex all thumbs butte corners, it is doable to finish the constrictor knot off with brainstorm additional overhand knot, emergence the fashion of grand reef knot, to whisper stabilize it. Those recommendations aside, constrictor knots controversy function best on anyway convex objects.

If the constricted factor (such as a for the moment whipped rope) ends disentangle close to where systematic constrictor binds it, wonderful boa knot may sentence a more stable predicament.

Jot down

External links

References