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A sling is a projectile weapon typically used to throw a blunt projectile such as a stone, clay, or lead "sling-bullet". It is also known as the shepherd's sling. Someone who specializes in using slings is called a slinger. It was known in ancient China as the Piao Shih (飃石, lit. 'whirlwind stone').
A sling has a small cradle or pouch in the middle of two lengths of cord. The sling stone is placed in the pouch. The middle finger or thumb is placed through a loop on the end of one cord, and a tab at the end of the other cord is placed between the thumb and forefinger. The sling is swung in an arc, and the tab released at a precise moment. This frees the projectile to fly to the target. The sling essentially works by extending the length of a human arm, thus allowing stones to be thrown much farther than they could be by hand.
The sling is inexpensive and easy to build. It has historically been used for hunting game and in combat. Film exists of Spanish Civil War combatants using slings to throw grenades over buildings into enemy positions on the opposite street. Today the sling is of interest as a wilderness survival tool and an improvised weapon.
The sling in antiquity
The sling is an ancient weapon known to Neolithic peoples around the Mediterranean, but is likely much older. It is possible that the sling was invented during the Upper Palaeolithic at a time when new technologies such as the spear-thrower and the bow and arrow were emerging.
With the exception of Australia, where spear throwing technology such as the woomera predominated, the sling became common all over the world, although it is not clear whether this occurred because of cultural diffusion or as an independent invention.
Whereas sling-bullets and stones and clay objects thought by many archaeologists to be sling-bullets are common finds in the archaeological record, slings themselves are rare. This is both because a sling's materials are biodegradable and because slings were lower-status weapons, rarely preserved in a wealthy person’s grave.
The oldest-known surviving slings—radiocarbon dated to c. 2500 BC—were recovered from South American archaeological sites on the coast of Peru. The oldest-known surviving North American sling—radiocarbon dated to c. 1200 BC—was recovered from Lovelock Cave, Nevada.
The oldest known extant slings from the Old World were found in the tomb of Tutankhamen, who died c. 1325 BC. A pair of finely plaited slings were found with other weapons. The sling was probably intended for the departed pharaoh to use for hunting game.
Another Egyptian sling was excavated in El-Lahun in Al Fayyum Egypt in 1914 by William Matthew Flinders Petrie, and now resides in the Petrie Museum of Egyptian Archaeology—Petrie dated it to c. 800 BC. It was found alongside an iron spearhead. The remains are broken into three sections. Although fragile, the construction is clear: it is made of bast fibre (almost certainly flax) twine; the cords are braided in a 10-strand elliptical sennit and the cradle seems to have been woven from the same lengths of twine used to form the cords.
Representations of slingers can be found on artefacts from all over the ancient world, including Assyrian and Egyptian reliefs, the columns of Trajan and Marcus Aurelius, on coins, and on the Bayeux Tapestry.
Many European, Asian, and African peoples were users of slings. Thucydides and others authors talk about its usage by Greeks and Romans, and Strabo also extends it to the Iberians, Lusitanians and even some Gauls (which Caesar describes further in his account of the siege of Bibrax). He also mentions Persians and Arabs among those who used them. For his part, Diodorus includes Lybians and Phoenicians. Britons were frequent users of slings too.
Livy mentions the most famous of ancient skilful slingers: the people of the Balearic Islands, who often worked as mercenaries. Of these people Strabo writes: "And their training in the use of slings used to be such, from childhood up, that they would not so much as give bread to their children unless they first hit it with the sling."
Balearic slingers were amongst the specialist mercenaries extensively employed by Carthage against the Romans and other enemies. These light troops used three sizes of sling, according to the distance of their opponents. The weapons were made of vegetable fibre and animal sinew, launching either stones or lead missiles with devastating impact.
Xenophon in his history of the retreat of the Ten Thousand, 401 BC, relates that the Greeks suffered severely from the slingers in the army of Artaxerxes II of Persia, while they themselves had neither cavalry nor slingers, and were unable to reach the enemy with their arrows and javelins. This deficiency was rectified when a company of 200 Rhodians, who understood the use of leaden sling-bullets, was formed. They were able, says Xenophon, to project their missiles twice as far as the Persian slingers, who used large stones.
Various Greeks enjoyed a reputation for skill with the sling. Thucydides mentions the Acarnanians and Livy refers to the inhabitants of three Greek cities on the northern coast of the Peloponnesus as expert slingers.
Recruits are to be taught the art of throwing stones both with the hand and sling. The inhabitants of the Balearic Islands are said to have been the inventors of slings, and to have managed them with surprising dexterity, owing to the manner of bringing up their children. The children were not allowed to have their food by their mothers till they had first struck it with their sling. Soldiers, notwithstanding their defensive armour, are often more annoyed by the round stones from the sling than by all the arrows of the enemy. Stones kill without mangling the body, and the contusion is mortal without loss of blood. It is universally known the ancients employed slingers in all their engagements. There is the greater reason for instructing all troops, without exception, in this exercise, as the sling cannot be reckoned any encumbrance, and often is of the greatest service, especially when they are obliged to engage in stony places, to defend a mountain or an eminence, or to repulse an enemy at the attack of a castle or city.
The sling is mentioned in the Bible, which provides what is believed to be the oldest textual reference to a sling in the Book of Judges, 20:16. This text was thought to have been written c. 6th century BC, but refers to events several centuries earlier.
The Bible provides a famous slinger account, the battle between David and Goliath from the First Book of Samuel 17:34–36, probably written in the 7th or 6th century BC, describing events having occurred c. 10th century BC. The sling, easily produced, was the weapon of choice for shepherds fending off animals. Due to this, the sling was a commonly used weapon by the Israelite militia. Goliath was a tall, well equipped and experienced warrior. In this account, the shepherd David persuades Saul to let him fight Goliath on behalf of the Israelites. Unarmored and equipped only with a sling, five smooth rocks, and his staff, David defeats the champion Goliath with a well-aimed shot to the head.
Use of the sling is also mentioned in Second Kings 3:25, First Chronicles 12:2, and Second Chronicles 26:14 to further illustrate Israelite use.
Ancient peoples used the sling in combat—armies included both specialist slingers and regular soldiers equipped with slings. As a weapon, the sling had several advantages; a sling bullet lobbed in a high trajectory can achieve ranges in excess of 400 meters (1,300 ft). Modern authorities vary widely in their estimates of the effective range of ancient weapons. A bow and arrow could also have been used to produce a long range arcing trajectory, but ancient writers repeatedly stress the sling's advantage of range. The sling was light to carry and cheap to produce; ammunition in the form of stones was readily available and often to be found near the site of battle. The ranges the sling could achieve with moulded lead sling-bullets was surpassed only by the strong composite bow.
Caches of sling ammunition have been found at the sites of Iron Age hill forts of Europe; some 22,000 sling stones were found at Maiden Castle, Dorset. It is proposed that Iron Age hill forts of Europe were designed to maximize the effective defence by slingers.
The hilltop location of the wooden forts would have given the defending slingers the advantage of range over the attackers, and multiple concentric ramparts, each higher than the other, would allow a large number of men to create a hailstorm of stone. Consistent with this, it has been noted that defences are generally narrow where the natural slope is steep, and wider where the slope is more gradual.
A classic sling is braided from non-elastic material. The traditional materials are flax, hemp or wool. Sling by Balearic islanders were said to be made from a rush. Flax and hemp resist rotting, but wool is softer and more comfortable. Polyester is an excellent material for modern slings, because it does not rot or stretch and is soft and free of splinters.
Braided cords are used in preference to twisted rope, as a braid resists twisting when stretched. This improves accuracy.
The overall length of a sling can vary. A slinger may have slings of different lengths. A longer sling is used when greater range is required. A length of about 61 to 100 cm (2.0 to 3.3 ft) is typical.
At the centre of the sling, a cradle or pouch is constructed. This may be formed by making a wide braid from the same material as the cords or by inserting a piece of a different material such as leather. The cradle is typically diamond shaped (although some take the form of a net,) and will fold around the projectile in use. Some cradles have a hole or slit that allows the material to wrap around the projectile slightly, thereby holding it more securely.
At the end of one cord (called the retention cord) a finger-loop is formed. At the end of the other cord (the release cord), it is a common practice to form a knot or a tab. The release cord will be held between finger and thumb to be released at just the right moment, and may have a complex braid to add bulk to the end. This makes the knot easier to hold, and the extra weight allows the loose end of a discharged sling to be recovered with a flick of the wrist.
Braided construction resists stretching, and therefore produces an accurate sling. Modern slings are begun by plaiting the cord for the finger loop in the centre of a double-length set of cords. The cords are then folded to form the finger-loop. The retained cord is then plaited away from the loop as a single cord up to the pocket. The pocket is then plaited, most simply as another pair of cords, or with flat braids or a woven net. The remainder of the sling, the released cord, is plaited as a single cord, and then finished with a knot or plaited tab.
Ancient authors seemed to believe, incorrectly, that sling-bullets could penetrate armour, and that lead projectiles, heated by their passage through the air, would melt in flight. In the first instance, it seems likely that the authors were indicating that slings could cause injury through armour by a percussive effect rather than by penetration. In the latter case we may imagine that they were impressed by the degree of deformation suffered by lead sling-bullet after hitting a hard target.
Now one of the Huns who was fighting before the others was making more trouble for the Romans than all the rest. And some rustic made a good shot and hit him on the right knee with a sling, and he immediately fell headlong from his horse to the ground, which thing heartened the Romans still more.
The simplest projectile was a stone, preferably well-rounded. Suitable ammunition is frequently from a river or a beach. The size of the projectiles can vary dramatically, from pebbles massing no more than 50 grams (1.8 oz) to fist-sized stones massing 500 grams (18 oz) or more. The use of such stones as projectiles is well attested in the ethnographic record.
Possible projectiles were also purpose-made from clay; this allowed a very high consistency of size and shape to aid range and accuracy. Many examples have been found in the archaeological record.
The best ammunition was cast from lead. Leaden sling-bullets were widely used in the Greek and Roman world. For a given mass, lead, being very dense, offers the minimum size and therefore minimum air resistance. In addition, leaden sling-bullets are small and difficult to see in flight.
In some cases, the lead would be cast in a simple open mould made by pushing a finger or thumb into sand and pouring molten metal into the hole. However, sling-bullets were more frequently cast in two-part moulds. Such sling-bullets come in a number of shapes including an ellipsoidal form closely resembling an acorn; this could be the origin of the Latin word for a leaden sling-bullet: glandes plumbeae (literally 'leaden acorns') or simply glandes (meaning 'acorns', singular glans).
The ancients do not seem to have taken advantage of the manufacturing process to produce consistent results; leaden sling-bullets vary significantly. The reason why the almond shape was favoured is not clear: it is possible that there is some aerodynamic advantage, but it seems equally likely that there is some more prosaic reason, such as the shape being easy to extract from a mould, or the fact that it will rest in a sling cradle with little danger of rolling out. It is possible as well that the almond, non-circular shape, made the bullet spin in flight in a helicopter or disc like effect adding to the flight distance.
Almond shaped leaden sling-bullets were typically about 35 millimeters (1.4 in) long and about 20 millimeters (0.79 in) wide, massing approximately 28 grams (1 oz). Very often, symbols or writings were moulded into lead sling-bullets. Many examples have been found including a collection of about 80 sling-bullets from the siege of Perusia in Etruria from 41 BC, to be found in the museum of modern Perugia. Examples of symbols include a stylized lightning bolt, a snake, and a scorpion – reminders of how a sling might strike without warning. Writing might include the name of the owning military unit or commander or might be more imaginative: "Take this", "Ouch", "get pregnant with this" and even "For Pompey's backside" added insult to injury, whereas dexai ('take this' or 'catch!') is merely sarcastic.
Some bullets have been found with holes drilled in them. It was thought the holes were to contain poison. John Reid of the Trimontium Trust, finding holed Roman bullets excavated at the Burnswark hillfort, has proposed that the holes would cause the bullets to "whistle" in flight and the sound would intimidate opponents. The holed bullets were generally small and thus not particularly dangerous. Several could fit into a pouch and a single slinger could produce a terrorizing barrage. Experiments with modern copies demonstrate they produce a whooshing sound in flight.
The sling in medieval period
The Bayeux Tapestry of the 1070s portrays the use of slings in a hunting context. Frederick I, Holy Roman Emperor employed slingers during the Siege of Tortona in 1155 to suppress the garrison while his own men built siege engines. Indeed, slings seem to have been a fairly common weapon in Italy during the 11th and 12th centuries. On the Iberian peninsula, the Spanish and Portuguese infantry favoured it against light and agile Moorish troops. The staff sling continued to be used in sieges and the sling was used as a part of large siege engines.
The sling was known throughout the Americas.
In ancient Andean civilizations such as the Inca Empire, slings were made from llama wool. These slings typically have a cradle that is long and thin and features a relatively long slit. Andean slings were constructed from contrasting colours of wool; complex braids and fine workmanship can result in beautiful patterns. Ceremonial slings were also made; these were large, non-functional and generally lacked a slit. To this day, ceremonial slings are used in parts of the Andes as accessories in dances and in mock battles. They are also used by llama herders; the animals will move away from the sound of a stone landing. The stones are not slung to hit the animals, but to persuade them to move in the desired direction.
The sling was also used in the Americas for hunting and warfare. One notable use was in Incan resistance against the conquistadors. These slings were apparently very powerful; in 1491: New Revelations of the Americas Before Columbus, historian Charles C. Mann quoted a conquistador as saying that an Incan sling "could break a sword in two pieces" and "kill a horse". Some slings spanned as much as 2.2 meters (86 in) long and weighed an impressive 410 grams (14.4 oz).
The staff sling, also known as the stave sling, fustibalus (Latin), fustibale (French), consists of a staff (a length of wood) with a short sling at one end. One cord of the sling is firmly attached to the stave and the other end has a loop that can slide off and release the projectile. Staff slings are extremely powerful because the stave can be made as long as two meters, creating a powerful lever. Ancient art shows slingers holding staff slings by one end, with the pocket behind them, and using both hands to throw the staves forward over their heads.
The staff sling has a similar or superior range to the shepherd's sling, and can be as accurate in practiced hands. It is generally suited for heavier missiles and siege situations as staff slings can achieve very steep trajectories for slinging over obstacles such as castle walls. The staff itself can become a close combat weapon in a melee. The staff sling is able to throw heavy projectiles a much greater distance and at a higher arc than a hand sling. Staff slings were in use well into the age of gunpowder as grenade launchers, and were used in ship-to-ship combat to throw incendiaries.
Piao Shi ('whirlwind stone')
Piao Shi (飃石, lit. 'whirlwind stone'), also known as Shou Pao (手砲, lit. 'hand cannon') during the Song period, is the Chinese name for staff sling. It consists of a short cord tied to one end of a five chi bamboo pole, and is usually employed in siege defense alongside larger stone throwers. It's depicted and described in the Ji Xiao Xin Shu (紀效新書).
The kestros (also known as the kestrosphendone, cestrus or cestrosphendone) is a sling weapon mentioned by Livy and Polybius. It seems to have been a heavy dart flung from a leather sling. It was invented in 168 BC and was employed by some of the Macedonian troops of King Perseus in Third Macedonian war.
The traction trebuchet was a siege engine which uses the power of men pulling on ropes or the energy stored in a raised weight to rotate what was, again, a staff sling. It was designed so that, when the throwing arm of the trebuchet had swung forward sufficiently, one end of the sling would automatically become detached and release the projectile. Some trebuchets were small and operated by a very small crew; however, unlike the onager, it was possible to build the trebuchet on a gigantic scale: such giants could hurl enormous rocks at huge ranges. Trebuchets are, in essence, mechanized slings.
Traditional slinging is still practiced as it always has been in the Balearic Islands, and competitions and leagues are common. In the rest of the world, the sling is primarily a hobby weapon, and a growing number of people make and practice with them. In recent years 'slingfests' have been held in Wyoming, USA, in September 2007 and in Staffordshire, England, in June 2008.
According to the Guinness Book of World Records, the current record for the greatest distance achieved in hurling an object from a sling is 437.10 m (1,434 ft 1 in), using a 129.5 cm (51.0 in) long sling and a 52 g (1.8 oz) ovoid stone, set by Larry Bray in Loa, Utah, on 21 August 1981.
The principles of the sling may find use on a larger scale in the future; proposals exist for tether propulsion of spacecraft, which functionally is an oversized sling to propel a spaceship.
The sling is used today as a weapon primarily by protestors, to launch either stones or incendiary devices, such as Molotov cocktails. Classic woollen slings are still in use in the Middle East by Arab nomads and Bedouins to ward off jackals and hyenas. International Brigades used slings to throw grenades during the Spanish Civil War. Similarly, the Finns made use of sling-launched Molotov cocktails in the Winter War against Soviet tanks. Slings were used during the various Palestinian riots against modern army personnel and riot police. They were also used in the 2008 disturbances in Kenya.
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