Double constrictor knot how to knit. Tightening sea knots. "Baby" and straight knot

“Surprisingly, nine out of ten today’s residents who are not related to the professions of mountain rescuer, rock climber and hang glider, builder, high-rise installer, rigger, firefighter are completely inexperienced in the ability to tie knots, in this matter they are more naive than primitive people. At best, they know three knots and know how to tie (although not always securely and beautifully) shoe laces, a tie and a bow. But if you ask them to tightly tie two ropes, tie a rope to a post, or make a tightening loop on a rope, they will not be able to do this reliably. Why? Yes, because in each of three separate cases they are trying to use the same knot that they remembered in childhood: half a knot and another half knot. A knot tied in this way is weak and even dangerous. Its reliability does not increase at all if another half-knot is added on top of the two.
Often we try in vain to tie up a dog (almost strangling it) if we don’t have a collar at hand. Once on the water, we do not know how to attach the boat to a piling or eye on the pier.
Most of us do not know how to tie a simple and reliable knot that, if necessary, could be easily and quickly untied. And when people see a securely tied knot that is unfamiliar to them, they exclaim: “Oh! Tied with a sea knot!
from the book by L.N. Skryagina Marine knots

Methods of tying knots are shown in the form of diagrams consisting of two or three positions and arrows indicating the movement of the cable during tying. Some of the knots are presented, in addition to diagrams, with isometric drawings that give an idea of ​​what a tied knot should look like and how to apply it.

SIMPLE KNOTS
Designed to thicken the cable. Which can be useful either for weighting the cable or for stopping the sliding loop when knitting a collar for a dog :-)

Bloody Knot

Makes the cable heavier (the effect increases when wetted). If you make more turns, you will get a good handle at the end of the rope.

Eight"

Serves as a stopper and can be easily untied after loading.

Yufersny

It also works as a stopper. The peculiarity is that it is relatively easier to untie even if it is tightly tightened. (personally, I find it more convenient to tie this knot using method a))

Fire escape

It is used when you urgently need to go down a cable or climb a steep wall if there is no ladder. It is easier to hold on to knots than to “just” a rope. Or you need to pull out a car stuck in the mud. There is a long rope and people ready to help. To make it easier for them to pull, tie a “fire escape” on the ground so that the knots go approximately every meter.

Untightened knots

Simple bayonet

This simple but reliable unit can be used in all cases when the cable needs to be temporarily attached to some object for strong traction, for example, to a hook when towing a car. The maximum number of half-bayonets in such a knot under any circumstances should not exceed three, since this is quite sufficient and the strength of the knot as a whole will not increase with a larger number of half-bayonets.

Bed bayonet

As the name implies, bunks on ships were hung with such a knot. Tying a knot to hang a bunk is serious business. Here you need to use a knot that does not tighten, is easy to untie and holds securely. The most important thing is that it does not come undone on its own under the influence of the continuous rocking of the ship.
The figure shows 2 variants of the node.

Anchor knot

Tested by centuries of experience in maritime practice, this knot is recognized by sailors of all countries as the most reliable for attaching a rope to the eye or to the anchor shackle. It can be safely used in all cases when working with cables when they are subject to strong traction.

Bayonet with drift

This unit has hoses placed one on each side. This gives the knot greater symmetry; when the direction of pull changes, the knot moves less along the object to which it is tied.

KNOTS FOR TYING

Flemish knot

In fact, this is the same figure eight, tied at both ends. Used to connect both thin and thick cables. The connection is considered very strong. This knot, even if tightly tightened, does not damage the cable, and it is relatively easy to untie. In addition, it does not slip and holds securely on synthetic fishing line.

Straight knot

a - the usual method of knitting; b - sea knitting method.
The ancient Greeks and Romans called it Nodus Hercules - the Hercules or Hercules knot, because the mythical hero Hercules tied the skins of the lion he killed on his chest in this way.
To untie this knot, you need to grab the ends of one cable coming out of the knot and pull them in different directions, after which removing the “straightened” end will not be difficult. When untying a straight knot, one should not forget that with the same force it was tightened, it must be pulled with the same force.
However, Ashley and Riesenberg warn: “This assembly is used in many cases, although it can never be sufficiently reliable unless its running ends are seized. It should not be used for tying ropes for traction. This knot creeps and is dangerous when it gets wet.”

Flat knot

It has long been considered one of the most reliable knots for tying cables of different thicknesses.
Method a) a loose knot with its free running ends tacked to the main ones is called the “Josephine knot”; it does not change its shape even with strong traction and is easily untied after the load is removed. Method b) is used for tying thinner cables than anchor and mooring ropes, and of the same or almost the same thickness. In this case, it is recommended to first tighten the tied flat knot by hand so that it does not twist during a sharp pull. After this, when a load is applied to the connected cable, the knot creeps and twists for some time, but when it stops, it holds firmly. It unties without much effort by shifting the loops covering the root ends.

Herbal knot

Despite its name, this elementary unit is quite reliable and can withstand heavy loads. In addition, it can be easily untied in the absence of traction.

Packet node

Its name suggests that it is convenient for tying bags and bundles. It is simple, original and designed for quick knitting. The packet knot is somewhat reminiscent of the grass knot. In terms of strength, it is not inferior to the latter. (From my own experience of using a knot: it’s convenient to tie something soft and elastic because it’s convenient to tighten the cable and you don’t need a third hand to hold the knot in a tightened state while you’re tying. But it’s better to wind the second end folded in half. The knot won’t lose strength, but it’s incomparably easier to untie lighter than the original one from the picture).

Clew knot

The clew knot is simple and very easy to untie. Tightening tightly does not damage the cable. It should be remembered that it holds securely only when traction is applied to the cable. It is not recommended to use a clew knot on a synthetic rope, as it slips and can break out of the loop.

Bram clew knot

A clew knot is more reliable than a clew knot because it does not immediately untie when the pull on the cable stops. The clew knot is also reliable for tying two cables of different thicknesses. It holds well on synthetic cables of equal thickness.

Docker node

The docker's knot is reliable enough to use the throwing end to pull (or lift onto the deck from the shore) a heavy mooring line, and it quickly unties. It is best used as a temporary knot when it is necessary to attach a much thinner cable to a thick rope. The figure shows 2 options for knitting this knot.

SELF-TIGHTENING KNOTS

Self-tightening knot

Of all the primitive knots, this is perhaps the most original, as they say “it couldn’t be simpler.” A thrust commensurate with the strength of the cable can be applied to the root part of the cable of this unit, and it will hold securely. The greater the thrust, the more strongly the free running end is pressed by the hose, and the knot tightens itself. This is essentially the simplest form of a noose. This unit should be used with great care. Always remember that it is only secure when it is tied around a log and constant force is applied to the root end. If this force is applied to the cable alternately, as if in jerks, then the running end may slip out from under the root end of the cable.
It makes sense to use a self-tightening knot in cases where the load suspended from the root end is motionless and the direction of thrust to this end does not change.
This unit is convenient for hanging bags of grain or cereal on a crossbar in warehouses to save them from rodents. By releasing the running end of the cable, the suspended bag can be smoothly lowered to the ground or warehouse floor.

Whitened

This is a very reliable tightening knot that holds flawlessly as long as traction is applied to both ends of the cable. It is extremely convenient for attaching cables to objects that have a smooth surface, such as a log. The tapping unit is very convenient for feeding a tool to a height (for example, a hammer for those working on a construction site). When weaving many types of fishing nets, the bleached knots form the first row of knitting. However, when using a tapping knot, you should always remember that it is reliable only with a constant pull on the cable or rope.

Constrictor

"Boa constrictor" is the zoological name for boa constrictor in Latin. The knot, known throughout the world by this name, is one of the most tightly tightened knots. At the same time, it is considered one of the most difficult knots to untie. As a rule, it is not even untied; it serves only once. The “constrictor” tightens well if it is tied to round objects that do not have sharp corners; in this case it is irreplaceable.
Here's a use case for it

On the right, the ladder knitting option is depicted incorrectly. (How does the crossbar hold up?)

How could I fix it?

Double constrictor

Although this knot is more complex than the one just described, it tightens even more. It, like the single “constrictor”, is considered an indispensable tightening knot in everyday life.

Python knot

Just as a python is almost no different from a boa constrictor, so this knot has no special differences from a “constrictor”. They are similar in principle. The Python knot is applicable for the same cases as the “constrictor”. With one clarification, it is easier to untie because it is tightened less tightly even with a strong tightening force.

Gaff knot

The name itself already indicates that it is from the family of sea knots. In our time, it has already been forgotten, apparently because the need for it has disappeared. You can always use it in everyday life when the need arises to quickly attach a cable to some cylindrical object.

Lisel knot

It differs from the previous unit in that the running end is inserted under the hose, which makes it difficult for it to slip out under load.

NON-TIGHTENING HINGES

Flemish loop

Knitted in a figure eight on a doubled rope, it is a strong and easy to untie loop at the end of the rope.

Austrian conductor

The loop is designed to pull in any direction and can be tied in the middle of the cable.

Gazebo knot aka bowline

It makes sense to dwell on this point in more detail. This is one of the oldest and most amazing knots ever invented by man. In English marine technical literature it is often called the “King of Knots”. It is surprisingly easy to knit, even with strong traction it never tightens “tightly”, does not spoil the cable, never slides along the cable, does not untie itself, but is easy to untie when needed. The main purpose of the gazebo knot is to tie a rope around a person under the arms as a means of insurance when climbing to a height, lowering overboard or in a smoke-filled room during a fire on board a ship. A gazebo can be inserted into the non-tightening loop of this knot. This knot can be successfully used for tying two cables of any diameter or for tying a thick plant cable with a steel one (in this case, the cables are connected with loops, and the knots are tied at their root ends).
In life, the ability to quickly tie a bow knot around your waist can always come in handy. You need to be able to do this with one hand, with one continuous movement of the hand, in the dark, in 2-3 seconds. It's not at all difficult to learn this.
Take the main end of the cable in your left hand, and with your right hand, wrap the running end around your waist behind you. Take the running end in your right hand and, stepping back from its edge about 10 centimeters, hold it in your fist. Take the root end in your left hand and extend your left arm forward. Now, with the root end of the cable slightly stretched, with your right hand, with the running end clamped in it, bend the root end of the cable from top to bottom towards you and up from you. Try to make such a movement with the brush so that it does not completely fall into the loop. Next, wrap the running end around the stretched root end to the left and grab it with the thumb and forefinger of your right hand. As you pull the right hand out of the loop, simultaneously insert the running end into the small loop. Holding the running end with your right hand, pull the root end with your left hand. The knot is tied around your waist in a pattern. After doing this several times in a row, you will learn how to tie a bower knot on yourself in the dark or with your eyes closed.

Double gazebo knot

This knot, which has two non-tightening loops, is used instead of a gazebo to lift a person to a height, to raise or lower a person who has lost consciousness, and in other cases. When tying a knot, one of the loops is made almost half the size of the other. A person sits in one loop, the second loop clasps his torso under the arms. This allows him, having risen to a height, to work with both hands.
In maritime practice, there are several ways to tie a double bower knot. The simplest one is presented here.

Bunny ears knot

The range of use is the same as the previous node. It just tightens more.

Kalmyk knot

It is one of the practical and reliable units. Its name indicates that it appeared in our country. And although the Kalmyk steppes do not evoke associations with the sea and ships, it has long been used in the navy. Foreign sailors do not know him, and, oddly enough, he does not appear in any of the numerous manuals on tying knots published abroad. The Kalmyk knot holds securely and quickly unties if you pull the running end. It is used for temporary fastening of the casting end to the mooring line when the latter is supplied from the vessel to the pier. It is used to attach reins to a bridle, as well as to tie a horse in a stable.

TIGHTENING KNOTS

Sliding blind loop

This simple and durable knot can be used in everyday life to tighten various bales and packages when packing them. Tying a knot is extremely simple and does not require any comments.

node "Poacher"

I got this knot from Ashley's book. I liked it because initially the knot at the root end is loosely tightened. Subsequently, the knot is tightened in proportion to the force applied when jerking the noose. Which makes it much more difficult to remove. In simple words, first tighten the knot loosely so that the rope slides easily in it. After a jerk (of game, for example), the noose is first tightened, clasping the limb caught in the loop, and then the knot. Tightening and not allowing the noose to unravel.

Drunken knot

From time immemorial this knot in Rus' was called “drunk”. It was used to pacify excessively riotous people by putting loops on the wrists behind the back and tying the ends on the chest.

Shackle knot

It is very similar to a “drunk” knot. Its name in English means "handcuffs". The node can serve the same purpose. Despite the external similarity, these are two different nodes. In any case, without untying them and without removing the ends from the central loop, it is impossible to turn one knot into another.

QUICK-RELEASE KNOTS

Almost any knot becomes quick-release if the running end is inserted into the last loop folded in half. For example, a simple figure eight becomes a quick-release figure eight.

This is what comes out of a reef knot


that's what's from the clew

in some cases, the knot may change its name, as for example happened with the Cossack knot; when the chassis is wound up folded in half, the knot becomes Kalmyk



Therefore, I will not dwell particularly on these nodes.

SPECIAL KNOTS

Bag knot

In the navies of different countries, sailors stored their personal belongings in different ways - in bags, lockers and “suitcases”. For example, according to the tradition of the British Royal Navy, sailors' clothing was stored exclusively in canvas bags. In the Russian Imperial Navy, large and small “suitcases” made of gray canvas No. 6 were used to store the personal belongings of sailors. Both had from four to seven eyelets and a canvas flap. The canvas bags of English military sailors had 12 eyelets, which were tightened with a piece of line. To carry the bags, the sailors attached a piece of shtert to them, with which they tied them with a bag knot.

Peg (leg of lamb)

In English maritime language this knot is called "Sheepshank", which means "shank of lamb". The knot received this name from the British due to the external similarity of its shape to a leg of lamb. In domestic manuals on maritime affairs, it does not have any proper name; it is simply called a “knot for shortening the cable.”
The famous Russian sea captain V.V. Bakhtin in his “Explanatory Marine Dictionary” calls this knot a “peg”. Traditionally, sailors cut the cable under exceptional circumstances. And if, for example, on a ship 25 meters of cable are required for some work, and there is a free piece 40 meters long at hand, then they will not cut it, but will shorten it to 25, making it an ordinary “leg of lamb” one of the two presented ways. It is also used in cases where, during a critical operation with a cable, there are doubts about its strength: for example, one strand is frayed in one place or the cable is cut. When using this useful unit, one must not forget that it is strong and reliable only under load, and as soon as the latter is removed, there is a danger that the unit will fall apart. Therefore, before each use of a rope with a tied peg, the knot should be checked.

Courier-driver node

They are used for fastening and transporting cargo as it gives an advantage in strength of approximately 2 times without the use of blocks. It is easy to make and falls apart as soon as the tension is released.
Here's another knitting option.

Monkey fist

It was invented in the days of pirates, when a ship in distress needed to throw the saving end of a rope from another ship. Anyone who has tried to throw a rope in a storm knows that without a weight at the end it is an almost pointless activity. And then the idea arose to use a cannonball as a weighting agent. It was in order to secure the core to the rope that this knot was developed. In addition, the “Monkey Fist Knot” has become a symbol of mutual assistance and brotherhood. This design also began to be used as a bladed weapon.

Marchard knot (French Prusik)

The main use of a knot is to allow one to ascend and descend on a rope. Features of the knot: when loaded by the ends coming out of the knot, the knot is tightened and does not slip along the main rope, and when you grab the knot itself with your hands, it moves easily.

Curtain knot

This node is here for beauty, the name is not original, so you can correct it in the comments. Used as curtain ties.

And a little humor

Thank you for your attention, I hope that the article will be useful.

Sequence of tying a knot with an accessible end.

Got its name in honor of [ ] Boa constrictor, the zoological name for boa constrictor in Latin. The boa constrictor kills its victim by strangulation; accordingly, this knot got its name for its exceptional tightening force.

It is one of the most tightly tightened knots. It tightens well if it is tied on round objects without sharp edges. After tightening, the running and main ends of the rope go perpendicular to the axis of the object to which the rope is attached.

When you remove the object around which it is tied, this knot dissolves itself when the running and main ends of the rope are stretched. Therefore, it can be tied without threading the end of the rope into the loops in the manner shown in the pictures:

Since it is extremely difficult to untie, it is usually tied once and, if necessary, the object is cut.

The knot is used when cutting cables. To the left and right of the cutting site, a constrictor is tied around the cable, thereby preventing the cable from disintegrating into individual ropes at the cutting site.

There is also an even stronger knot called the “double constrictor”.

A person learns to knit knots from childhood. Having learned to tie shoelaces, the child knits his first knot. Throughout life, it is difficult to even imagine in what situations knowledge of tying knots can be useful.

Self-tightening knot - what is it

Most types of knots and methods of tying them came to the modern world from the navy, although in this area it is used infrequently due to its unreliability. The fact is that a self-tightening knot holds tightly only under constant load; at the moment of weakening, it is quite capable of coming undone. Despite this, there are areas for its application.

This is the simplest original knot and in general represents one of the simplest types of noose. This unit reliably withstands heavy weight and traction, proportional to the strength of the cable or other material from which it is made. But you need to be careful when using it, making sure that the load on the node does not weaken.

For better reliability, there are several variations of this unit.

Tying a knot

The methods of tying this knot are among the simplest and fastest. All you need to create it is a rope with a running end and a support. Fishermen use a spool for this purpose.

The end of the rope is wrapped around the support, thus forming an open loop. At the end of the rope or fishing line you need to form a loop. First make a winding around it behind the running end and create a closed loop. The running end of the loop needs to be made several turns and brought out through the main loop. Pull it, the knot will tighten and, under load, show all its power.

To improve the strength of the knot itself when knitting, a self-tightening knot with half bayonets is used. It is performed no more difficult than the standard one. After performing the basic knitting technique, two half-bayonets are formed on the weight side. This type achieves maximum effect when certain conditions are met:

• if it is not formed in the center;
• if the running end should be directed towards the intended load.

Where is it used?

He will find his place in all spheres of life. It is often used in mountaineering and in warehouses (they are used for hanging heavy objects). Fishermen use it when tying gear for fishing from the shore.

Shock-absorbing units are popular. They are formed on an additional rope, which is used to connect a spare fastening in case of destruction of the main one. There are also self-tightening units for transporting goods or for various rescue operations. These include the braking unit, “belts” and mariner.

There are two types of fastenings - simple and complex, for different life situations. In the navy, the original self-tightening knot is rarely used, with preference given to its variations.

Fastening

The mount is often popular with fishermen. Although experienced fishermen suggested tying a self-tightening knot for fishing line without additional parts, their use makes life much easier. The fastening helps to fix the loops during knitting, prevents the knot from unraveling abruptly, and simplifies the knitting process. On the shelves of fish stores you can now see reels with a stopper for attaching braid. Many anglers reel in the line held by the spool without unnecessary fasteners, but only those who have gained experience over many years.

Kinds

There are 18 types of self-tightening knots in total, but using one rope there are only 4 types:

● Classic Prusik.

● Cross.

● With an “arb” carbine.

● Bachmann knot (with carabiner).

The number of turns is unstable; if necessary, it can be increased.

It is necessary to highlight one of the strongest knots - the constrictor knot. It gets its name from the zoological name for the boa constrictor, Boa constrictor, which defeats its prey by strangulation. This one with

The self-tightening knot for rope is reliable and is made using rounded objects instead of support. As soon as the support disappears, it dissolves itself.

Use of the knot by anglers

A self-tightening knot for the top of the head is actively used by fishermen. It is a structure made from a block of tops with a weight. Tying such a tackle is quite simple.

To do this you will need a fishing line, a double leader and a sinker. A special sinker must be purchased at the store, otherwise the entire device may fail. Most often it looks like a horseshoe with a hole in the center of the product. The top bar is tightened using a self-tightening knot and hung with hooks.

To decorate the tackle, take a fishing line 4 mm in diameter and up to 50 cm in length. The fishing line is pushed through the hole into the sinker to the middle, after which it is brought up. Insulation is put on it and a loop is made. After this, a self-tightening knot is formed, onto which the crown is attached. The insulation serves as a fastener for a long leash on the side of the free end of the fishing line, onto which a swivel is attached to protect the fishing line from twisting in the current. Having secured the cake block with hooks, you can consider the task completed. The workpiece is attached with a carabiner to the main fishing line. The bait is ready to be cast. Getting into the water, it gradually gets wet, and the crumbling cake from the top spreads in the reservoir, attracting the desired fish.

Nautical

Initially, a self-tightening rope knot was created by sailors to secure sails and various objects on deck. Reliable nodes are the key to success, because the seas and oceans are so turbulent. During the heyday of navigation, there were more than 500 types of knots. Tying sea knots is a whole science. But with the introduction of the steam engine, the need for sails disappeared, and knots began to be used less. And the change in the composition of the materials of cables and ropes caused some knots to lose their effectiveness.

A self-tightening knot was used in maritime affairs for fastening to cylindrical objects. It is simply called a noose, since the hanged noose was tied according to the same principle. In the event of no load or variable traction, the running end slides out, dissolving the entire assembly. This was the reason for refusing to use it. Therefore, the navy began to use the constrictor knot and self-tightening with half bayonets. The peculiarity of its knitting is that the knot itself is placed offset, so that the running end is directed towards the load. Due to this, it will not slip out so quickly.

Advantages

The self-tightening knot has gained recognition primarily due to its ease of knitting and high efficiency. Despite its unreliability, it is often used, but only in those cases when they are sure of the presence of constant weighting. When forming the unit, no additional materials or devices are required. The main task, which it copes with brilliantly, is to withstand a load proportional to the density of the cable (rope, fishing line, cable) from which the knot is knitted.

If there is constant weight, the knot is not able to untie on its own, only manually, which will also not cause trouble. It is as easy to untie as it is to tie. This advantage was appreciated by fishermen and climbers, for whom every second is precious. This property makes this node a leader.

Even a child can learn how to knit a noose, and proper use contributes to the maximum realization of the expected result - reliable holding of a large weight.

Although this knot is more complex than the one just described, it tightens even more. It, like the single constrictor, is considered an indispensable tightening knot.

Noose

(forest knot, log knot)

It is used in cases where you need to secure the end of a rope around a tree or stone. In industrial mountaineering, this unit is often used for its intended purpose, i.e. for lifting cylindrical objects or objects whose transverse dimensions are much smaller than their longitudinal ones. The noose is convenient to use when towing logs in water, when loading rails and telegraph poles.

This knot is widely used by lumberjacks. It is better to use a noose with two half-bayonets. Lifting heavy objects with a noose without half bayonets is considered dangerous.

A noose with half bayonets is a reliable and very durable knot that is extremely tightly tightened around the object being lifted.

The running end of the rope is placed over the root end, wrapped around it and passed inside the loop. Next, moving in the opposite direction towards the object being clamped, 3-4 hoses are made with the running end. A safety knot in the form of a simple knot must be tied at the end of the rope.

You don't need any rigging equipment to lift a tree trunk, log, rail, or metal pipe. You can get by with a rope of appropriate strength. The noose is knitted slightly away from the middle of the log (pipe). The running end of the rope is taken out of the loop that makes up the knot, and pulled towards the end of the object being lifted, from which the pull will be made, and two half-bayonets are made.

But, as a rule, two half-bayonets are made before the start of tying the noose, since the root end of the tackle is already secured. The slack between the noose and half bayonets must be selected before lifting. It is also important in which direction the half bayonets are made on the object. They should be laid as the rope descends.

: Rice. 50 B.

E. Tightening loops

Running simple knot

This is the simplest knot that forms a tightening loop. When pulling on the root end, the loop is tightened, but it can be increased in size by pulling the running end away from the loop. A knot can be tied in any part of the rope. With its help, you can tie up a bale, attach a rope to something, or moor a boat to a pile. This is “part” of the knot when tying straight, woman’s, academic, thief’s, mother-in-law knots with the running end in a loop.

"Drunk" knot

This is a knot with two tightening loops. To tighten these two loops, you need to simultaneously pull the running and root ends. This knot in Rus' apparently got its name because it was used to pacify excessively riotous people by putting loops on the wrists behind the back and tying the ends on the chest. The knot is described in detail in manuals on hand-to-hand combat.

Shackle knot

(butterfly knot, policeman's knot)

The knot is very similar to the drunken knot. Its name in English means "handcuffs". The node can serve the same purpose. Until now, many police officers keep a silk cord in their holster, which they use when there are many detainees and there are not enough handcuffs available. Often, instead of a cord, the detainee's trouser belt is used. Despite the external resemblance to a drunken knot, these are two different knots. If you carefully examine the diagrams of the knots, you will notice that the drunken knot is formed (knitted) from loops of rope assembled in a spiral, and the shackle knot is a knot obtained from the stirrup knot (blend knot).

The knot is useful for tourists to know. The knot is truly universal, it has the properties of a noose, stirrup, double top knot, etc.

“Boa constrictor” is the name given to a boa constrictor in zoology. Varieties of such snakes are capable of killing their victims by clenching their muscles (constriction in Latin), wrapping themselves in rings.

It is under the name “boa constrictor knot”, this strong tightening knot, has become famous throughout the world. Such fasteners are almost impossible to untie. Usually used once. It can only be released by removing the object inserted into it.

How to tie a Constrictor Knot?

Knitting such a knot is not difficult, it resembles, but there is a slight difference:

First loop. The rope is wrapped around the support. At the outlet, the running end is located under the main end.
Second loop. The running end is inserted behind the support and turned around on the reverse side.
At the exit from the second loop, the running end is passed under the first loop.
By pulling the main and running ends, the Constrictor is tightened.
So that the knot can be quickly untied, in step 3, pass the running end folded in half under the first loop.

You can make a knot in your hands without immediately putting it on the desired item.

Double Constrictor

Double constrictor, a little more complicated to perform, but more reliable. Tightens tighter than normal fastening.

It must be remembered that they work well on surfaces that are round in shape and do not have sharp edges.

The methods for forming fasteners are clearly shown in this video:

Wide application of node

Such units are used not only in maritime practice. They are widely used in everyday life, for example you can:

• eliminate the leak in the rubber hose by squeezing the leaking area;
• knit a rug or blankets;
• tighten the bag;
• tightly bandage the “nipple” of the ball chamber;
• securely fix the bully's hands.

Fishermen often used when tying sinkers, making makushatniks. In this case, a piece of cake is attached to the tackle using this method.

Hunters used to lift a dead bear. Having inserted a stick between the fangs of the animal, the mouth is tied with a “constrictor”. This way the skin remains undamaged.

Doctors, using this method a tourniquet is applied to the damaged limbs.

Climbers, tourists– used in the manufacture of a reliable “stirrup” (less pressure on the foot, tightens more slowly), and in the manufacture of handrails.

In production The knot is suitable for lifting weights. Riggers place temporary marks. Places where the cable is damaged and will subsequently be cut are marked. The constrictor prevents the cable fibers from unraveling.

There are many other places and possibilities for using this type of fastener.