digplanet beta 1: Athena
Share digplanet:

Agriculture

Applied sciences

Arts

Belief

Business

Chronology

Culture

Education

Environment

Geography

Health

History

Humanities

Language

Law

Life

Mathematics

Nature

People

Politics

Science

Society

Technology

Trebuchets at Château de Castelnaud
Counterweight trebuchet constructed on the design of the "Warwolf"
Medieval traction trebuchet (also called a perrier) next to a staff slinger

A trebuchet[nb 1] (French trébuchet) is a type of catapult that was used as a siege engine in the Middle Ages. It is sometimes called a counterweight trebuchet or counterpoise trebuchet, to distinguish it from an earlier weapon called the traction trebuchet, which employed pulling men working the mechanism.

The counterweight trebuchet appeared in both Christian and Muslim lands around the Mediterranean in the 12th century. It could fling projectiles weighing up to 350 pounds (160 kg) at or into enemy fortifications. Its use continued into the 15th century, well after the introduction of gunpowder.

The trebuchet's technical constructions were lost at the beginning of the 16th century. In 1984, the French engineer Renaud Beffeyte made the first modern reconstruction of a trebuchet, based on documents from 1324.[3]

Basic design[edit]

A trebuchet works by using the energy of a raised counterweight to throw a projectile. A long beam is attached to an axle. At the short end of the beam is attached the counter weight. The long end of the beam is pulled down, raising the counterweight. A sling, which has a pouch containing the projectile, is attached to the long end of the beam. Upon releasing the trigger, the sling and the beam swing upward, pivoting on the axle toward the vertical position, whereupon one end of the sling releases, opening the pouch and allowing the projectile to fly towards the target. The stored energy of the counterweight is transferred efficiently to the projectile.[4]

Modern-day enthusiasts have varied the original design, especially to control the path of the counterweight for increased efficiency.[5]

The three chief distinguishing characteristics of a trebuchet are:

  • The machine is powered exclusively by gravity; most often directly by means of a counterweight, though sometimes indirectly (such as in a traction trebuchet).
  • Such force rotates a throwing arm, usually four to six times the length of the counterweight arm, to multiply the speed of the arm and, eventually, the projectile.
  • The machine has a sling affixed to the end of the throwing arm, acting as a secondary fulcrum, to further multiply the speed of the projectile.

Comparison with other siege engines[edit]

The trebuchet is often confused with the earlier torsion siege engines. The main difference is that a torsion siege engine (examples of which include the onager and ballista) uses a twisted rope or twine to provide power, whereas a trebuchet uses a counterweight, placed much closer to the fulcrum than the projectile to provide (inverse) mechanical advantage and thereby sweep the long arm much faster than the counterweight falls. A trebuchet also has a sling holding the projectile (although the Roman onager often had a sling as well), and a means for releasing it at the right moment for maximum range. Further, the stroke finishes without the long arm slamming into a pad as with a torsion catapult producing the "kick" that prompted the name "onager". With a trebuchet, the action of the sling captures much of the forward speed of the arm just before release of the payload as could be seen in a strobe image.

The Couillard is a smaller version with a single stem or platform instead of the usual double "A" frames. The counterweight is split into two halves to avoid hitting the center stem.

History[edit]

Traction trebuchet[edit]

13th-century illustration for the Chronicle of John Skylitzes, depicting the Byzantines laying siege to a city.

The trebuchet derives from the ancient sling. A variation of the sling, called staff sling (Latin: fustibalus), contained a short piece of wood to extend the arm and provide greater leverage. This evolved into the traction trebuchet in which a number of people pulled on ropes attached to the short arm of a lever that has a sling on the long arm. This type of trebuchet is smaller and has a shorter range, but is a more portable machine and has a shorter cycle time than larger, counterweight-powered types. The smallest traction trebuchets could be powered by the weight and pulling strength of one person using a single rope, but most were designed and sized for between 15 and 45 men, generally two per rope. These teams would sometimes be local citizens helping in the siege or in the defense of their town. Traction trebuchets had a range of 100 to 200 feet (30 to 61 m) when casting weights up to 250 pounds (110 kg). It is believed that the first traction trebuchets were used by the Mohists in China as early as in the 5th century BC descriptions of which can be found in the Mojing (compiled in the 4th century BC). The Chinese named the later counterweight trebuchet Huihui Pao (Muslim Weapons, "huihui" means Muslim) or Xiangyang Pao (襄陽砲), where Pao means bombard. At the Battle of Caishi in 1161, trebuchets operated by Song Dynasty soldiers fired bombs of lime and sulphur against the ships of the Jin Dynasty navy during the Jin–Song wars.[6][7]

The traction trebuchet next appeared in Byzantium. The Strategikon of Emperor Maurice, composed in the late 6th century, calls for "ballistae revolving in both directions," (Βαλλίστρας έκατηρωθεν στρεφόμενας), probably traction trebuchets (Dennis 1998, p. 99). The Miracles of St. Demetrius, composed by John I, archbishop of Thessalonike, clearly describe traction trebuchets in the Avaro-Slav artillery: "Hanging from the back sides of these pieces of timber were slings and from the front strong ropes, by which, pulling down and releasing the sling, they propel the stones up high and with a loud noise." (John I 597 1:154, ed. Lemerle 1979)

They were also used with great effect by the Islamic armies during the Muslim conquests. A surviving Arab technical treatise on these machines is Kitab Aniq fi al-Manajaniq ( "كتاب الأنيق في المنجنيق", An Elegant Book on Trebuchets), written in 1462 by Yusuf ibn Urunbugha al-Zaradkash. It provides detailed construction and operating information.

There is some doubt as to the exact period in which traction trebuchets, or knowledge of them, reached Scandinavia. The Vikings may have known of them at a very early stage, as the monk Abbo de St. Germain reports on the siege of Paris in his epic De bello Parisiaco dated about 890 AD that engines of war were used. Another source mentions that Nordic people or "the Norsemen" used engines of war at the siege of Angers as early as 873 AD[citation needed].

Hand-trebuchet[edit]

The hand-trebuchet (Greek: cheiromangana) was a staff sling mounted on a pole using a lever mechanism to propel projectiles. Basically a portable trebuchet which could be operated by a single man, it was used by emperor Nikephoros II Phokas around 965 to disrupt enemy formations in the open field. It was also mentioned in the Taktika of general Nikephoros Ouranos (c. 1000), and listed in De obsidione toleranda (author anonymous) as a form of artillery.[8]

Counterweight trebuchet[edit]

Counterweight trebuchet at Château des Baux, France
Counterweight trebuchet by the German engineer Konrad Kyeser (c. 1405)
19th century French three-quarter drawing of a medieval counterweight trebuchet
Side view of counterweight trebuchet

The earliest written record of the counterweight trebuchet, much more powerful than the traction version, appears in the work of the 12th century Byzantine historian Niketas Choniates. Niketas describes a trebuchet used by Andronikos I Komnenos, future Byzantine emperor, at the siege of Zevgminon in 1165 which was equipped with a windlass, an apparatus which was required neither for traction nor hybrid trebuchets to launch missiles.[9] Chevedden dates the invention of the new artillery type back to the Siege of Nicaea in 1097 when the Byzantine emperor Alexios I Komnenos, an ally of the besieging crusaders, was reported to have invented new pieces of heavy artillery which deviated from the conventional design and made a deep impression on everyone.[10]

The dramatic increase in military performance is for the first time reflected in historical records on the occasion of the second siege of Tyre in 1124, when the crusaders reportedly made use of "great trebuchets".[11] By the 1120–30s, the counterweight trebuchet had diffused not only to the crusaders states, but probably also westwards to the Normans of Sicily and eastwards to the Great Seljuqs. The military use of the new gravity-powered artillery culminated in the 12th century during the Siege of Acre (1189–91) which saw the kings Richard I of England and Philip II of France wrestle for control of the city with Saladin's forces.[12]

The only pictorial evidence of a counterweight trebuchet in the 12th century comes from an Islamic scholar, Mardi bin Ali al-Tarsusi, who wrote a military manual for Saladin circa 1187.[12][13] He describes a hybrid trebuchet that he said had the same hurling power as a traction machine pulled by fifty men due to "the constant force [of gravity], whereas men differ in their pulling force." (Showing his mechanical proficiency, Tarsusi designed his trebuchet so that as it swung it cocked a supplementary crossbow, probably to protect the engineers from attack.)[14]

During the Crusades, Philip II of France named two of the trebuchets he used in the Siege of Acre in 1191 "God's Stone-Thrower" and "Bad Neighbor."[15] During a siege of Stirling Castle in 1304, Edward Longshanks ordered his engineers to make a giant trebuchet for the English army, named "Warwolf". Range and size of the weapons varied. In 1421 the future Charles VII of France commissioned a trebuchet (coyllar) that could shoot a stone of 800 kg, while in 1188 at Ashyun, rocks up to 1,500 kg were used. Average mass of the projectiles was probably around 50–100 kg, with a range of ca. 300 meters. The cycle rate could be noteworthy: at the siege of Lisbon (1147), two engines were capable of launching a stone every 15 seconds. Also human corpses could be used on special occasion: in 1422 Prince Korybut, for example, in the siege of Karlštejn Castle shot men and manure within the enemy walls, apparently managing to spread infection among the defenders. The largest trebuchets needed exceptional quantities of timber: at the Siege of Damietta, in 1249, Louis IX of France was able to build a stockade for the whole Crusade camp with the wood from 24 captured Egyptian trebuchets.

Counterweight trebuchets do not appear with certainty in Chinese historical records until about 1268, when the Mongols laid siege to Fancheng and Xiangyang. At the Siege of Fancheng and Xiangyang, the Mongol army, unable to capture the cities despite besieging the Song defenders for years, brought in two Persian engineers who built hinged counterweight trebuchets and soon reduced the cities to rubble, forcing the surrender of the garrison. These engines were called by the Chinese historians the Huihui Pao (回回砲)("huihui" means Muslim) or Xiangyang Pao (襄陽砲), because they were first encountered in that battle. Recent research by Paul E. Chevedden indicates that the hui-hui pao was actually a European design, a double-counterweight engine that had been introduced to the Levant by Holy Roman Emperor Frederick II (1210–1250) only shortly before.[16] The Muslim historian Rashid-al-Din Hamadani (1247?–1318) refers in his Universal History to the Mongol trebuchets used at the Song cities as "Frankish" or "European trebuchets" ("manjaniq ifranji" or "manjaniq firanji"):

Before that there had not been any large Frankish catapult in Cathay [i.e. China], but Talib, a catapult-maker from this land, had gone to Baalbek and Damascus, and his sons Abubakr, Ibrahim, and Muhammad, and his employees made seven large catapults and set out to conquer the city [Sayan Fu or Hsiang-yang fu = modern Xiangfan].[17]

With the introduction of gunpowder, the trebuchet lost its place as the siege engine of choice to the cannon. Trebuchets were used both at the siege of Burgos (1475–1476) and siege of Rhodes (1480). One of the last recorded military uses was by Hernán Cortés, at the 1521 siege of the Aztec capital Tenochtitlán. Accounts of the attack note that its use was motivated by the limited supply of gunpowder. The attempt was reportedly unsuccessful: the first projectile landed on the trebuchet itself, destroying it.[18]

In 1779, British forces defending Gibraltar, finding that their cannons were unable to fire far enough for some purposes, constructed a trebuchet. It is unknown how successful this was: the Spanish attackers were eventually defeated, but this was largely due to a sortie.[citation needed]

Modern use[edit]

Recreation and education[edit]

Trebuchet at Middelaldercentret, Denmark.

Most trebuchet use in recent centuries has been for recreational or educational, rather than militaristic purposes. New machines have been constructed and old ones restored by living history enthusiasts, for historical re-enactments, and use in other historical celebrations. As their construction is substantially simpler than modern weapons, trebuchets also serve as the object of engineering challenges.[19][20]

The largest currently-functioning trebuchet in the world is the 22-tonne machine at Warwick Castle, England. Based on historical designs, it stands 18 metres tall (59 ft) and throws missiles typically 36 kg (80 lbs) up to 300 metres (984 ft). It is built on the design of a similar trebuchet at Middelaldercentret in Denmark.[21] In 1989, Middelaldercentret became the first place in the modern era to have a working trebuchet.[21]

Trebuchets are used to throw pumpkins at the annual pumpkin chunking contest held in Sussex County, Delaware, USA. The record-holder in that contest for trebuchets is the Yankee Siege II, which at the 2013 WCPC Championship tossed a pumpkin 2835.8 ft (864.35 metres). The 51-foot-tall (16 m), 55,000-pound (25,000 kg) trebuchet flings the standard 8–10-pound (3.6–4.5 kg) pumpkins,[22] specified for all entries in the WCPC competition.

Developments[edit]

Although rarely used as a weapon today, trebuchets maintain the interest of professional and hobbyist engineers. One modern technological development is the "floating arms" design. Instead of using the traditional axle fixed to a frame, these devices are mounted on wheels that roll on a track parallel to the ground, with a counterweight that falls directly downward upon release, allowing for greater efficiency by increasing the proportion of energy transferred to the projectile.[5]

Uses in activism and insurgency[edit]

Trebuchet erected by rioters in Hrusehvskoho Street, Kiev

In 2013, during the Syrian civil war, rebels were filmed using a trebuchet in the Battle of Aleppo.[23] The trebuchet was used to project explosives at government troops.[citation needed]

In 2014, during the Hrushevskoho street riots, rioters used an improvised trebuchet to throw bricks and molotov cocktails at Berkut.[24]

See also[edit]

External links[edit]

  • Super Trebuchets - A website about trebuchets with particular focus on modern uses and developments.

Notes[edit]

  1. ^ Pronounced /ˈtrɛbəʃɛt/ TREB-ə-shet or /ˌtrɛbjʊˈʃɛt/ TREB-ew-SHET;[1] also spelled trebucket /ˈtrbʌkɨt/ TREE-bucket or /ˌtrɛbjʊˈkɛt/ TREB-ew-KET[2]

  1. ^ OED, Random House Unabridged Dictionary
  2. ^ Random House Unabridged Dictionary
  3. ^ http://armedieval.fr
  4. ^ Siano, pp 5,6 and 37
  5. ^ a b RLT Industries. "The Original Floating Arm Trebuchet". Trebuchet.com. New Braunfels, TX. Retrieved May 3, 2010. 
  6. ^ Needham, Joseph (1987). Science and Civilisation in China: Military technology: The Gunpowder Epic, Volume 5, Part 7. Cambridge University Press. p. 166. ISBN 978-0-521-30358-3. 
  7. ^ Franke, Herbert (1994). Denis C. Twitchett; Herbert Franke; John King Fairbank, eds. The Cambridge History of China: Volume 6, Alien Regimes and Border States, 710–1368. Cambridge University Press. pp. 241–242. ISBN 978-0-521-24331-5. 
  8. ^ Chevedden 2000, p. 110
  9. ^ Chevedden 2000, p. 86
  10. ^ Chevedden 2000, pp. 76–86; 110f.
  11. ^ Chevedden 2000, p. 92
  12. ^ a b Chevedden 2000, pp. 104f.
  13. ^ Bradbury, Jim (1992). The Medieval Siege. The Boydell Press. ISBN 0-85115-312-7. 
  14. ^ "Historynet.com". Historynet.com. Retrieved 2010-09-12. 
  15. ^ "Historic Trebuchets – Acre 1191", IInet.net.au
  16. ^ "Black Camels and Blazing Bolts: The Bolt-Projecting Trebuchet in the Mamluk Army", Mamluk Studies Review Vol. 8/1, 2004, pp. 227–277 (232f.)
  17. ^ Rashiduddin Fazlullah’s Jamiʻuʾt-tawarikh (Compendium of Chronicles), English translation & annotation by W.M. Thackston, 3 vols., Cambridge, Mass.: Harvard University, Dept. of Near Eastern Languages and Civilizations, 1998–99, 2: 450
  18. ^ Chevedden 1995, p. 5
  19. ^ "Thelep.org.uk". Thelep.org.uk. 2008-11-20. Retrieved 2010-09-12. 
  20. ^ "Wright.edu". Engineering.wright.edu. Retrieved 2010-09-12. 
  21. ^ a b June 14, 2005 Reconstructing Medieval Artillery. archive.archaeology.org. Retrieved 12 September 2013
  22. ^ "World Championship Punkin Chunkin-Current World Records". punkinchunkin.com. Retrieved November 20, 2012. 
  23. ^ http://www.youtube.com/watch?v=LmKCWjh-FZM
  24. ^ "Ukrainian Protesters Built A Giant Catapult To Fight The Riot Police". BuzzFeed. 20 January 2014. Retrieved 20 January 2014. 

Bibliography[edit]

  • Chevedden, Paul E.; et al. (July 1995). "The Trebuchet". Scientific American: 66–71.  . Original version.
  • Chevedden, Paul E. (2000). "The Invention of the Counterweight Trebuchet: A Study in Cultural Diffusion". Dumbarton Oaks Papers 54: 71–116. doi:10.2307/1291833. JSTOR 1291833. 
  • Dennis, George (1998). "Byzantine Heavy Artillery: The Helepolis". Greek, Roman, and Byzantine Studies (39). 
  • Gravett, Christopher (1990). Medieval Siege Warfare. Osprey Publishing. 
  • Hansen, Peter Vemming (April 1992). "Medieval Siege Engines Reconstructed: The Witch with Ropes for Hair". Military Illustrated (47): 15–20. 
  • Hansen, Peter Vemming (1992). "Experimental Reconstruction of the Medieval Trebuchet". Acta Archaeologica (63): 189–208. 
  • Jahsman, William E.; MTA Associates (2000). The Counterweighted Trebuchet – an Excellent Example of Applied Retromechanics. 
  • Jahsman, William E.; MTA Associates (2001). FATAnalysis. 
  • Archbishop of Thessalonike, John I (1979). Miracula S. Demetrii, ed. P. Lemerle, Les plus anciens recueils des miracles de saint Demitrius et la penetration des slaves dans les Balkans. Centre National de la Recherche Scientifique. 
  • Liang, Jieming (2006). Chinese Siege Warfare: Mechanical Artillery & Siege Weapons of Antiquity – An Illustrated History. 
  • Needham, Joseph (2004). Science and Civilization in China. Cambridge University Press. p. 218. 
  • Needham, Joseph (1986). Science and Civilization in China: Volume 4, Part 2. Taipei: Caves Books, Ltd.
  • Payne-Gallwey, Sir Ralph (1903). "LVIII The Trebuchet". The Crossbow With a Treatise on the Balista and Catapult of the Ancients and an Appendix on the Catapult, Balista and Turkish Bow (Reprint ed.). pp. 308–315. 
  • Saimre, Tanel (2007). Trebuchet – a gravity operated siege engine. A Study in Experimental Archaeology. 
  • Siano, Donald B. (November 16, 2013). Trebuchet Mechanics. 
  • Al-Tarsusi (1947). Instruction of the masters on the means of deliverance from disasters in wars. Bodleian MS Hunt. 264. ed. Cahen, Claude, "Un traite d'armurerie compose pour Saladin". Bulletin d'etudes orientales 12 [1947–1948]:103–163. 

External links[edit]



Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Trebuchet — Please support Wikipedia.
A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
72220 videos foundNext > 

Trebuchet Physics Tutorial: Make Your Trebuchet Throw Farther

This is a brief tutorial on trebuchet physics and useful tricks to make your trebuchet throw farther. Much of this isn't obvious if you're new to trebuchets ...

The Medieval Trebuchet

Follow this movie that documents NOVA's successful attempt to build and shoot a giant trebuchet, the most destructive war machine that ever laid siege to a m...

Trebuchet Siege Artillery - Battle Castle with Dan Snow

Dan Snow takes a look at the counter balance trebuchet, a medieval siege weapon capable of firing a projectile that weighs 2 - 300 kilograms, heavy enough to...

Floating Arm Trebuchet

Construction and testing of a floating arm trebuchet for Logan's AP Physics class. During our testing, the trebuchet launched golf balls about 170 ft with 15...

Most powerful trebuchet in the world

Our Guinness World Record "Largest trebuchet with projectile 20kg or larger". See page 200/201 of GBWR 2006 for proof. Weight 45 tonnes, counterweight 23 ton...

World record trebuchet at Warwick Castle

The world's largest trebuchet siege engine at Warwick Castle in the midlands, fired daily and similar to the design of the smaller trebuchet at Dover castle....

Ten Foot Trebuchet boulder shooting

http://www.stormthecastle.com Launching the ten foot trebuchet. The swing arm is ten feet long and the base is ten feet long. The Projectile is a six pound r...

Mini Trebuchet (Catapult)

We built two small trebuchets for a school project a couple years back. They use a cigar box filled with lead shot for a counterweight, are made of oak, and ...

Warwick Castle Trebuchet

Building a Trebuchet

Westley Skogen builds and tests a 25 foot tall medieval style trebuchet. A trebuchet was first designed as a weapon of war, utilizing a sling release system ...

72220 videos foundNext > 

9649 news items

 
STLtoday.com
Mon, 31 Mar 2014 22:04:16 -0700

More than 180 students from area high schools competed in Lewis and Clark's Seventh Annual Trebuchet contest on March 28 in the George C. Terry River Bend Arena. Trebuchets were used in medieval times to hurl heavy objects such as rocks. Teams of ...
 
The Roanoke Star
Thu, 03 Apr 2014 12:17:07 -0700

With this high of a weight, the trebuchets will be subject to intense forces. The risk of a trebuchet failure is greater if ample supports are not used, but the projectiles, cantaloupes for this competition, will be capable of flying hundreds of feet ...

BBC News

BBC News
Tue, 15 Apr 2014 06:06:29 -0700

A Warwick Castle spokesman said they had been testing "fire effects" to go with the daily firing of the Trebuchet Fireball - a giant catapult. "We've seen a number of different effects, including the vortex images that have been reported," the ...

Marketplace.org

Marketplace.org
Tue, 15 Apr 2014 10:15:00 -0700

Hulton Archive/Getty Images. Soldiers wearing chain mail loading baskets of stones on to a trebuchet behind the walls of a castle circa 1400. Keep this in mind when you're talking to the boss. by Chris Colin and Rob Baedeker. Tuesday, April 15, 2014 ...

Telegraph.co.uk

International Business Times AU
Wed, 16 Apr 2014 22:15:00 -0700

4. The Mother of Dragons declares war. With her growing army and dragons, Daenery's declares war and she is aiming to attack the City of Slaves, Meereen, and this time she will use a new tactic - death by trebuchet. 5. Davos vs. the Red Woman. Once ...
 
Quad City Times
Fri, 11 Apr 2014 16:22:03 -0700

Just before 10:30 p.m. Thursday, four Moline High School students put the finishing touches on their homemade trebuchet for Friday's seventh annual egg-launching competition at Bettendorf High School. The team's senior leader, Jesse Mallery, had to ...

Leamington Courier

Leamington Courier
Wed, 16 Apr 2014 03:07:30 -0700

Historic Warwick sent in a photo of the same type of black ring in the sky above Mill Street last Saturday evening and on Twitter said: “It's the new pyrotechnics for the Warwick Castle trebuchet.” The smoke ring explanation is also supported by a ...
 
Sequim Gazette
Wed, 16 Apr 2014 09:18:45 -0700

Kind of like — not a trebuchet, not a catapult — it's like a big slingshot. Some people call them 'slingers.' So Larry had this one and he said, 'I'm not using it. Take it.' So here we are and the next thing you know, well, bumpers (cylindrical ...
Loading

Oops, we seem to be having trouble contacting Twitter

Talk About Trebuchet

You can talk about Trebuchet with people all over the world in our discussions.

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!