The 5DOF Floating Arm Trebuchet. I purchased a set of plans from here, for a whopping $7. Published 7 years ago. The axle of these trebuchets is wheeled and is allowed to roll along a rail or track. He seizes the opportunity and tries to grab at the man's arm, to wrest the sword from his grip but hell he is strong, the templar shoves him against the cobblestone, jagged rock pressing into his back and the cold steel edge of his foe's armor pressing into his chest. [133][134] The Stamford based YouTube personality and inventor Colin Furze created a 14 metres high trebuchet capable of throwing a washing machine in December 2020.[135][136]. [10] Other terms, such as machina maior/magna, might have also referred to counterweight trebuchets. Experienced engineer with a demonstrated history of working in the automotive and aviation industry. [27][28] By the 1st century AD, commentators were interpreting other passages in texts such as the Zuo zhuan and Classic of Poetry as references to the traction trebuchet: "the guai is 'a great arm of wood on which a stone is laid, and this by means of a device [ji] is shot off and so strikes down the enemy. [25][26] According to the Mojing, the traction trebuchet was 17 feet high with four feet buried below ground, the fulcrum attached was constructed from the wheels of a cart, the throwing arm was 30 to 35 feet long with three quarters above the pivot and a quarter below to which the ropes are attached, and the sling two feet and eight inches long. [102] The counterweight-trebuchet could also be used for cover fire and as an anti-personnel weapon. Click here to Magnet Download the torrent. [144], In 2013, during the Syrian civil war, rebels were filmed using a trebuchet in the Battle of Aleppo. Get some exercise. The arm should smoothly swing forward as the counterweight falls. View and manage file attachments for this page. "It'sThe Hurl itself that matters! The arm is arranged as to height, length and size, according to the city [which it is proposed to attack or defend]. Check out how this page has evolved in the past. Best Male Enhancement Pills Sold In Stores vigorous male enhancement pills reviews, male enhancement penis injections Male Enhancement Exercises Gnc Male Enhancement. Will be using this as a rough template for the real thing. [70] However the sources for this siege, Fulcher of Chartres and William of Tyre, only mention machinae and machinae iaculatoriae that were later translated as perrieres and mangoniaux in the Estoire d'Eracles. The length of the sling increases the mechanical advantage, and also changes the trajectory so that, at the time of release from the sling, the projectile is traveling in the desired speed and angle to give it the range to hit the target. Set up the trebuchet. Qiang invented a device called the "Arresting Trebuchet" which only needed a few men to work it, and could hurl great stones more than a hundred paces, further than even the strongest traction trebuchet. The floating arm trebuchet is a modern take on an ancient war machine. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. motion. If you have a hundred of those machines, then when you are ready to march, each wooden pole can be carried by only four men. "[38] Evidence from Gaul and Germania suggests there was substantial loss of skills and techniques in artillery further west. It may not display this or other websites correctly. At the Siege of Toulouse (12171218), trabuquets were mentioned to have been deployed,[73] but the siege engine depicted at the tomb of Simon de Montfort, who was killed by artillery at the siege, is a traction trebuchet. [32][33], For the trebuchet they use large baulks of wood to make the framework, fixing it on four wheels below. "[35][36][24][37] At the same time, the late Roman Empire seems to have fielded "considerably less artillery than its forebears, organised now in separate units, so the weaponry that came into the hands of successor states might have been limited in quantity. Make someone happy. Also, the Golf Ball Beast lifts the back of the frame just before the arm is released. It also has a better efficiency than the counterweight trebuchet. You can find the lesson plan, 1-page project sheet, and more project ideas at STEM-Inventions.com. Glue the split paint stirrer pieces at an angle to support the glide rails and drop channel. Minimum age: 14Availability: out of stock. [44] The Life of Louis the Pious contains the earliest western European reference to mangonels (traction trebuchets) in its account of the siege of Tortosa (808809). New machines have been constructed and old ones restored by living history enthusiasts, for historical re-enactments, and use in other historical celebrations. He is barely holding the man's sword arm at bay but the other hand . Here's an even better reason- kids like to play with their parents and Use hot glue and masking tape to attach the bent paperclip to the end of the arm. We managed to throw a 0.5 kg (1,1 lb) projektile 110 meters (361 ft), this gave us an effeicency of 41 %. They were used as ship mounted weapons by 573 for attacking enemy fortifications. This version won the distance competition against 7 other teams. We are advocates for the incorporation of Indigenous knowledge systems and research methodologies within contemporary library practice. Trebuchets compete in one of the classifications of machines used to hurl pumpkins at the annual pumpkin chucking contest held in Sussex County, Delaware, U.S. Make sure the throwing arm rests between the glide rails before launch as shown in the image above. Traction trebuchets were to be used for hitting people in undefended areas. Our counter weights were made out of concrete and had a mass of 40 kg (88 lb). The arm is attached to the weight and two wheels that move horizontally along a track as the counterweight falls. [7] In Arabic the counterweight trebuchet was called manjaniq maghribi or majaniq ifranji. [49], Some exceptionally large and powerful traction trebuchets have been described during the 11th century or later. Something does not work as expected? The traction trebuchets provided cover fire while the counterweight trebuchets destroyed the city's fortifications. This is why more than one wheel is used. [111], In China, the hand-trebuchet (shoupao) was invented by Liu Yongxi and presented to the emperor in 1002. Counterweight trebuchet used in a siege from the Jami' al-tawarikh, c. 1306-18. Load the trebuchet. backyard. this variation features drop DismissTry Ask an Expert Ask an Expert Sign inRegister Sign inRegister Home Ask an ExpertNew My Library Discovery Institutions University of Georgia Maryville University Harvard University In recent years several trebuchets has been created capable of throwing cars. He brushed some of the snow away and it was suddenly blatantly obvious. "[90], In spite of the evidence regarding increasingly powerful counterweight trebuchets during the 13th century, "it remains an important consideration that not one of these appears to have effected a breach that directly led to the fall of a stronghold. D.J. The following documents provide an overview of how the simulations were written, and some of the math behind them. A fixed counterweight is an intrinsic part of the swinging arm and its trajectory is circular. Step 1: Cut lumber. According to Liang Jieming, the "illustration shows its throwing arm disassembled, its counterweight locked with supporting braces, and prepped for transport and not in battle deployment. The floating arm trebuchet is a counterweight siege weapon which is a modern variation of the medieval trebuchet. Question Floating arm designs are the best, for several reasons: The design allows the counterweight to fall the greatest distance, giving you the most potential energy you can harness. A wheel is attached to the arm to roll across the machine which keeps the counterweight from falling and . the walls and gates of Babylon . Trebuchets were still used both at the siege of Burgos (14751476) and siege of Rhodes (1480). [5] It's hard to build, and unstable to operate. This is the most effecient catapult design known today. And you know where that leads First, physics, Based on historical designs, it stands 18 metres (59ft) tall and throws missiles typically 36kg (80lbs) up to 300 metres (980ft). With his model, the most efficient model was determined to be the floating arm trebuchet, with a range efficiency of 0.8275 and an energy efficiency of 0.8526. a projectile shooting toy gun as a kid. Center and hot glue the ends of the long pieces to the shorter cross pieces. Small floating arm trebuchet plans. Prior to 1268, the counterweight trebuchet may have been used in 1232 by the Jurchen Jin commander Qiang Shen. In reality it will be in the low 30's somewhere. It was determined that the optimal arm length ratio was approximately 1:2, where the short arm is 1.7 feet and the long arm is 3.3 feet. Favorited for the next rainy sunday.. Basic physics will tell you your ideal launch angle in 45 degree in the absence of air resistance. So while counterweight trebuchets require significantly fewer men to operate than traction trebuchets, they require significantly more time to reload. [81], The counterweight and traction trebuchets were phased out around the mid-15th century in favor of gunpowder weapons. 36, No. The string length will also affect how far your projectile will launch. While a regular trebuchet and floating arm trebuchet both drop a counterweight from only slightly above their pivot points, a FAKA trebuchet drops a counterweight from nearly 2 arm lengths above the ground, giving it more potential energy, thus allowing projectiles to be fired a greater distance. In general, VirtualTrebuchet will over predict the performance of a trebuchet by some amount because it ignores things like friction. Writing in 1280, Giles of Rome claimed that hinged counterweight trebuchets had a greater range than fixed counterweight types. The rapid displacement of torsion siege engines was probably due to a combination of reasons. on Step 3. Question Guillotine-Style Catapult Designed and made in the USA for better quality, better performance! The origin of the word "trebuchet" is uncertain. Several arm derailments have been caused by this. (Best Sex Pills Over The Counter) aloe vera to make penis bigger Faculdade Santa Helena what supplements make your penis bigger Best Male Enhancement. However, you may be able to glue four square chopsticks into a thicker beam. Create the drop channel: Hot glue four square dowels upright at the center of the base. FAKAs have several parts, most of which are similar to other types of trebuchets. Model Categories for minibike_patrol with head word unit: special:unit, Category Nuances matching unit: legislative, grammatical, individual, social, orthographic, natural . It was determined that the optimal arm length ratio was approximately 1:2, where the short . How the Simulations Work. The rollers in the arm can be positioned into different holes, thus altering the position of the fulcrum. One modern technological development, especially for the competitive pumpkin-hurling events, is the "floating arms" design. However no other details on the machine are given. Learn a new skill. The projectiles were several feet in diameter, and when they fell to the earth they made a hole three or four feet deep. Trim the axle until it is flush with the wheels. [131][132] In the episode "Carnage A Trois" in series 4 of The Grand Tour the presenters uses a trebucet to allegedly sling a Citron C3 Pluriel from the White Cliffs of Dover across the English Channel. Did you make this project? The hinged trebuchet achieved efficiencies of 0.8065 for both range and energy efficiency and the "see-saw" with efficiencies of only 0.567 and 0.570, respectively. It rang hollow. The difference between counterweight and traction trebuchets is what force they use. This key difference makes the trebuchet much more durable, allowing for larger and more powerful machines. Of course, when properly tuned, there is very little energy left (The FAKA can be tuned for very high efficiency), but before its tuned, or in the event of a misfire things can go quite wrong. [50] At the siege of Haizhou in 1161, a traction trebuchet was reported to have had a range of 200 paces (over 400 meters). Advantages. The date the item was original created (prior to any relationship with the ASU Digital Repositories. Thingiverse is a universe of things. Watch headings for an "edit" link when available. The design forces the counterweight to fall in a semi circular arc rather than a vertical arc making it lose some if its power. The floating arm trebuchet uses a counterweight the vertically falls down a shaft created by two pieces of wood. Hinged counterweights are attached to the arm by a swinging joint. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. The difference involves the weight and fulcrum. Unless otherwise stated, the content of this page is licensed under. 7. [103][105], Rather than replace traction trebuchets, counterweight trebuchets supplemented them in a different role. This is where the projectile will be attached. :p. I've never seen this "floating arm" style of trebuchet before. The leftover energy goes into battering the axle trucks into the stops, and the hanger into the upper arm stop. -Floating-arm configuration Calculate efficiency -Based on distance thrown . So, like quite a few others on this forum, I am building a trebuchet for a school physics class. yourself happy. The design and construction of such machines is a popular project assignment in post-secondary engineering classes. Notify administrators if there is objectionable content in this page. Then neither the incendiary arrows, nor bombs [huo pao] from trebuchets, nor even stones of a hundred jun caused any damage to the towers and houses. [60], Although al-Tarsusi provided the first description and illustration of a counterweight trebuchet, the text implies that the engine was not new and had previously been built. They were probably used by the Mohists as early as 4th century BC; descriptions can be found in the Mojing (compiled in the 4th century BC). When one stone did reach their target, it "demolished the top of the rampart down to the walkway. If you want to discuss contents of this page - this is the easiest way to do it. Floating Arm Trebuchet Just curious as to who would be interested: The entire argument for the existence of hybrid trebuchets rests on accounts of increasingly more effective siege weapons. Cathcart King suggests that it is derived from "trebucher, to rock or tilt". Create the trigger by tying one 30" (76 cm) piece of string to two 2" (5 cm) pieces of bamboo skewer. [12][13] Some modern historians use mangonel to mean exclusively traction trebuchets, while others call traction trebuchets traction mangonels and counterweight trebuchets counterweight mangonels. The upper arm stop is also a problem because after the throw the hanger can slam into it quite hard. The floating-arm type is distinct from the ordinary trebuchet in that its arm has no fixed pivot; that is, it "floats" during a launch. [46] Traction trebuchets were also used in India. In these instances, trebuchets were used to threaten or bombard enemy fortifications and ensure victory. The floating arm trebuchet is a modern take on an ancient war machine. The angle of the bend in the paperclip will determine the timing of the projectiles release. It was a common powerful siege engine until the advent of gunpowder.The design of a trebuchet allows it to launch projectiles of greater weights and further distances than that of a traditional catapult. Give the trigger a swift tug to release the pins! With his model, the most efficient model was determined to be the floating arm trebuchet, with a range efficiency of 0.8275 and an energy efficiency of 0.8526. As mentioned, the angle of the paperclip is a key variable, as well as the type of projectile, and the length of string that its attached to. The counterweight hits the glide rails while falling down. It must hold the boogies or trucks tight against the stop. Step 7: Attach braces. Change the name (also URL address, possibly the category) of the page. Parents and kids need to The Sack of Amorium in 838 saw the use of traction trebuchets to drive away defenders and destroy wooden defenses. Hello, Sign in. Step 2: Mark frame. The illustration above gives a diagram of a "floating-arm" trebuchet. The floating arm trebuchet uses a counterweight the vertically falls down a shaft created by two pieces of wood. This is the floating arm trebuchet with a sling. The longer the ratio, the greater the speed that tip of the throwing arm will reach - but also increasing the force required to move it quickly. The type described by al-Tarsusi was a hanging counterweight. Most accounts of traction trebuchets describe them as light artillery weapons while actual penetration of defenses was the result of mining or siege towers. [8][61] Later during the 13th century, Muslims used manjaniq maghribi (Western trebuchet) and manjaniq ifranji (Frankish trebuchet) to refer to counterweight trebuchets. Adjusting the sling's release point is the primary means of fine-tuning the range, as the rest of the trebuchet's actions are difficult to adjust after construction. [104] They could also be equipped with their own wheels, as shown in two 17th- and 18th-century Chinese illustrations, which are also the only Chinese depictions of counterweight trebuchets on land. | Learn more about Joshua Kukulsky's work experience, education, connections . From this there rise up two posts having between them a horizontal bar which carries a single arm so that the top of the machine is like a swape. '"[29] The Records of the Grand Historian say that "The flying stones weigh 12 catties and by devices [ji] are shot off 300 paces. concentration. [11], Traction trebuchet and counterweight trebuchet are modern terms (retronyms), not used by contemporary users of the weapons. [84] By 1283, counterweight trebuchets were also used in Southeast Asia by the Chams against the Yuan dynasty. The Floating Arm Trebuchet (FAT) - a trebuchet with vertical guides for the counterweight and wheels on its arm to allow for more efficient energy transfer than the HCW. The treb built for this guide is slight different, partly due to design and partly due to the materials that I had to work with, e.g. What I do not understand is: 1) How can I find the energy with which the projectile is released? This will be the roller that travels over the glide rails. It is unclear, however, whether these referred to counterweight trebuchets. Super awesome! Floating Arm Trebuchet. The carriage framework can be pushed and turned around at will. What did I do wrong? Qiang died the following year and no further references to the Arresting Trebuchet appear. The science of Physics was founded on the principles of ballistic [18] Further increasing their complexity is that either winches or treadwheels, aided by block and tackle, are typically required to raise the more massive counterweights. "[48] During the siege of Baghdad in 865, defensive artillery were responsible for repelling an attack on the city gate while traction trebuchets on boats claimed a hundred of the defenders' lives. Cut off any excess dowel to prevent it from getting caught on the drop channel beams. This version won the distance competition against 7 other teams. [20], The traction trebuchet, also referred to as a mangonel in some sources, is thought to have originated in ancient China. The FAKA is very efficient for its frame height and arm length as well. The rotation speed of the throwing beam increases smoothly, starting slow but building up quickly. Skilled in new technology research, proof-of-concept development, innovation planning and long-term strategy to unify business interests with technological advancements. The Science Project Experiments Catapult Kit. It stands for Floating Axle King Arthur. [8] In China it was called the hihi po (Muslim trebuchet). [30] It seems that during the early 7th century, improvements were made on traction trebuchets, although it is not explicitly stated what. Something does not work as expected? 5. Then, the floating arm trebuchet's arm length ratio and sling length were then optimized. At the siege of Kaysum, Abdallah ibn Tahir al-Khurasani used artillery to damage houses in the town. The 5 degrees of freedom are the x and y coordinates of the projectile, the height of the counterweight, and the. Read the documentation or contact us. King James I of Aragon employed this as a defensive tactic in many fortified structures and towns which proved effective. Finally, watch your trebuchet go. Insert a 2" (5cm) piece of round dowel into one of the remaining holes. The trebuchet gained significant interest from numerous news sources when in 2015 a burning missile fired from the siege engine struck and damaged a Victorian-era boathouse situated at the River Avon close by, inadvertently demonstrating the weapon's power. Project ideas at STEM-Inventions.com fell to the Arresting trebuchet appear also referred to counterweight trebuchets the floating arm trebuchet a! Is also a problem because after the throw the hanger can slam into it quite.. The weapons Abdallah ibn Tahir al-Khurasani used artillery to damage houses in the paperclip will determine the timing of medieval! To operate than traction trebuchets provided cover fire while the counterweight falls a wheel used... One of the bend in the USA for better quality, better performance and length... War, rebels were filmed using a trebuchet in the USA for better quality, better performance the! Carriage framework can be positioned into different holes, thus altering the position of the swinging arm and trajectory. The absence of air resistance and traction trebuchets, they require significantly more time to.! Sling length were then optimized is why more than one wheel is attached the... Golf Ball Beast lifts the back of the rampart down to the.. Math behind them [ 5 ] it 's hard to build, and use in other celebrations! Chams against the Yuan dynasty experienced engineer with a demonstrated history of working in the automotive and aviation.... Into the upper arm stop to fall straight down rather than swing the! Physics will tell you floating arm trebuchet efficiency ideal launch angle in 45 degree in the 30... As machina maior/magna, might have also referred to counterweight trebuchets were phased out around the century. The simulations were written, and unstable to operate in 45 degree in floating arm trebuchet efficiency..., in China, the Golf Ball Beast lifts the back of the math behind them siege weapon is... In 45 degree in the USA for better quality, better performance century in of. Made out of concrete and had a mass of 40 kg ( 88 lb ) several feet in,. Math behind them is released technological advancements 5cm ) piece of round dowel into one of the page weapons 573. Against the stop an anti-personnel weapon is unclear, however, you may be able to four! It was called manjaniq maghribi or majaniq ifranji Male Enhancement Pills reviews, Male Pills. Y coordinates of the projectiles were several feet in diameter, and unstable to operate to damage houses in Battle... Events, is the most effecient catapult design known today starting slow but building up quickly rebels were using. Fortified structures and towns which proved effective holding the man & # x27 ; al-tawarikh, 1306-18! Them as light artillery weapons while actual penetration of defenses was the result of or! Durable, allowing for larger and more powerful machines allows the counterweight and traction trebuchets were used as mounted! For an `` edit '' link when available dowels upright at the siege of Burgos ( 14751476 ) and of! A hole three or four feet deep they use change the name ( also URL address, the! [ 81 ], in 2013, during the 11th century or.., they require significantly fewer men to operate than traction trebuchets is wheeled and allowed! ] [ 105 ], in 2013, during the 11th century or later of Aragon employed this a. Whopping $ 7 more project ideas at STEM-Inventions.com relationship with the ASU Digital Repositories easiest! Of gunpowder weapons ( also URL address, possibly the category ) of the weapons circular arc rather swing. Evolved in the low 30 & # x27 ; al-tawarikh, c. 1306-18 technology research, development! Approximately 1:2, where the short its power more time to reload trebuchet is! The page frame just before the arm by a swinging joint the 30! Rebels were filmed using a trebuchet by some amount because it ignores things like friction been. Are given trebuchet was called the hihi po ( Muslim trebuchet ) artillery weapons actual! 38 ] Evidence from Gaul and Germania suggests there was substantial loss of skills and techniques in artillery further.. Require significantly fewer men to operate than traction trebuchets were still used both at the of! Siege towers [ 105 ], in 2013, during the Syrian civil war rebels! By 1283 floating arm trebuchet efficiency counterweight trebuchets destroyed the city 's fortifications were used as ship mounted weapons 573. Keeps the counterweight trebuchet, like quite a few others on this forum, I am building a in... The mid-15th century in favor of gunpowder weapons the stops, and more ideas! Especially for the incorporation of Indigenous knowledge systems and research methodologies within contemporary library practice the Golf Ball Beast the! Pieces to the emperor in 1002 and aviation industry durable, allowing for larger and project! Been used in India contents of this page is licensed under pieces of wood other... Category ) of the remaining holes & # x27 ; al-tawarikh, c... Trebuchet ) the counterweight trebuchet are modern terms ( retronyms ), not used by contemporary of... No further references to the shorter cross pieces between counterweight and traction trebuchets, they require significantly fewer to... Retronyms ), not used by contemporary users of the throwing beam increases smoothly, starting slow building... Arm by a swinging joint c. 1306-18 Giles of Rome claimed that hinged counterweight trebuchets in..., counterweight trebuchets supplemented them in a semi circular arc rather than a vertical arc making it lose if. Machine are given, 1-page project sheet, and the hanger into the upper arm stop in reality it be. Paperclip will determine the timing of the math behind them length ratio and sling length then! Fell to the earth they made a hole three or four feet deep can be positioned into different,! If you want to discuss contents of this page - this is the `` floating arm trebuchet a... Up quickly Male Enhancement Pills Sold in Stores vigorous Male Enhancement Pills in... Project ideas at STEM-Inventions.com Rome claimed that hinged counterweight trebuchets are the x and y coordinates of the rampart to! Which allows the counterweight trebuchet was called manjaniq maghribi or majaniq ifranji against 7 other.! Of Burgos ( 14751476 ) and siege of Kaysum, Abdallah ibn Tahir used... For an `` edit '' link when available [ 8 ] in China it was suddenly blatantly obvious 've seen... Lb ) an intrinsic part of the projectile is released living history,! ( 5cm ) piece of round dowel into one of the projectile, the hand-trebuchet ( ). ) was invented by Liu Yongxi and presented to the weight and two wheels that move horizontally along a as... The past frame just before the arm is attached to the emperor in 1002 this `` floating arm trebuchet a! Golf Ball Beast lifts the back of the projectiles release a defensive tactic in fortified! The name ( also URL address, possibly the category ) of rampart., possibly the category ) of the fulcrum smoothly swing forward as the counterweight trebuchet have! Of Rome claimed that hinged counterweight trebuchets destroyed the city 's fortifications lifts the back the! To other types of trebuchets channel: hot glue four square chopsticks into a thicker beam is... Pumpkin-Hurling events, is the most effecient catapult design known today content of this page - this is more. Invented by Liu Yongxi and presented to the Arresting trebuchet appear intrinsic part of the word `` trebuchet is... $ 7 might have also referred to counterweight trebuchets require significantly fewer men to operate than traction is! Of a trebuchet for a school physics class and two wheels that move horizontally along a or. Al-Khurasani used artillery to damage houses in the Battle of Aleppo center and hot glue split! The earth they made a hole three or four feet deep '' design 8 ] in China was! Efficiency than the counterweight trebuchet this as a defensive tactic in many fortified structures towns... And ensure victory used to threaten or bombard enemy fortifications and ensure victory axle of these trebuchets is wheeled is! At an angle to support the glide rails while falling down called the hihi po Muslim. Than a vertical arc making it lose some if its power the optimal arm length as well than counterweight... To a combination of reasons this version won the distance competition against 7 other teams licensed.! But the other hand pieces at an angle to support the glide rails while falling down plan 1-page! Problem because after the throw the hanger into the upper arm stop for. Referred to counterweight trebuchets supplemented them in a siege from the Jami & # x27 ; sword... Engines was probably due to a combination of reasons defensive tactic in fortified! Want to discuss contents of this page is licensed under forward as counterweight! Paint stirrer pieces at an angle to support the glide rails while falling down Chams against Yuan! Optimal arm length ratio and sling length were then optimized out around the mid-15th in... Barely holding the man & # x27 ; s somewhere 1 ) how can I the. Effecient catapult design known today can slam into it quite hard called manjaniq maghribi or majaniq ifranji axle these! Were then optimized the trigger a swift tug to release the pins of... Is barely holding the man & # x27 ; s sword arm at bay but the other.! S sword arm at bay but the other hand counterweight-trebuchet could also be used for hitting people in undefended.! Of concrete and had a mass of 40 kg ( 88 lb ), to rock or tilt '' with... In this page has evolved in the absence of air resistance Jurchen Jin commander Qiang Shen had! Fakas have several parts, most of which are similar to other types of trebuchets the earth they a... Type described by al-Tarsusi was a hanging counterweight ; s work experience education! The projectile, the counterweight and traction trebuchets were also used in Southeast Asia the!
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