5. A paperclip with greater curve will give a delayed release and a straighter trajectory. [65][62], Chevedden argues that counterweight trebuchets appeared prior to 1187 in Europe based on what might have been counterweight trebuchets in earlier sources. [145] The trebuchet was used to project explosives at government troops. A fixed counterweight is an intrinsic part of the swinging arm and its trajectory is circular. "[100] The traction trebuchet continued to serve as an anti-personnel weapon. Favorited for the next rainy sunday.. [53], Five whirlwind trebuchets from the Wujing Zongyao[54], Crouching tiger trebuchet from the Wujing Zongyao[27], Sjio "Four Footed" traction trebuchet from the Wujing Zongyao[54], Traction trebuchet on a Song Dynasty warship from the Wujing Zongyao[27], 12th-century depiction of a traction trebuchet (also called a perrier) next to a staff slinger, There is little to no consensus as to where and when the counterweight trebuchet, which has been described as the "most powerful weapon of the Middle Ages",[56] was first developed. Price: $195.00 The FAKA is a trebuchet design invented in late 2006 by Craig Macomber. According to a stele in Barkul celebrating Tang Taizong's conquest of what is now Ejin Banner, the engineer Jiang Xingben made great advancements on trebuchets that were unknown in ancient times. This machine lets you get your counterweight higher than a traditional trebuchet but keeps the pivot point low enough to keep with the rules of our competition. [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. The arm should smoothly swing forward as the counterweight falls. I purchased a set of plans from here, for a whopping $7. The combination of FAT and KA does have a cost. Counterweight trebuchets use gravity; potential energy is stored by slowly raising an extremely heavy box (typically filled with stones, sand, or lead) attached to the shorter end of the beam (typically on a hinged connection), and releasing it on command. 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. This is why more than one wheel is used. VirtualTrebuchet is a web based trebuchet simulator that will allow you to quickly evaluate different trebuchet configurations. You can find the lesson plan, 1-page project sheet, and more project ideas at STEM-Inventions.com. 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. Not much is heard of them afterwards. [12][13] Some modern historians use mangonel to mean exclusively traction trebuchets, while others call traction trebuchets traction mangonels and counterweight trebuchets counterweight mangonels. Abstract A study was conducted on three models of the medieval siege engine, the trebuchet. A breach was created on the first shot but the machine was burnt down by the defenders. The rollers in the arm can be positioned into different holes, thus altering the position of the fulcrum. Our design was very stout and held around 720lbs in counterweight, not including the weight bar and arm itself. Center and hot glue the ends of the long pieces to the shorter cross pieces. "It'sThe Hurl itself that matters! This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. [31] In 617 Li Mi (Sui dynasty) constructed 300 trebuchets for his assault on Luoyang, in 621 Li Shimin did the same at Luoyang, and onward into the Song dynasty when in 1161, trebuchets operated by Song dynasty soldiers fired bombs of lime and sulphur against the ships of the Jin dynasty navy during the Battle of Caishi. you can. Step 4: Assemble trebuchet sides. On the side of the counterweight engine as a medieval military revolution, historians such as Sydney Toy, Paul Chevedden, and Hugh Kennedy consider its power to have caused significant changes in medieval warfare. See pages that link to and include this page. What I do not understand is: 1) How can I find the energy with which the projectile is released? It's far better than watching re-runs of some lame TV show Ismail and Al-aud-Din travelled to South China from Iraq and built trebuchets for the siege. The difference between counterweight and traction trebuchets is what force they use. [57] The earliest known description and illustration of a counterweight trebuchet comes from a commentary on the conquests of Saladin by Mardi ibn Ali al-Tarsusi in 1187. In reality it will be in the low 30's somewhere. David Nicolle argues that these events could have only been possible with the use of counterweight trebuchets. A trebuchet is a battle machine used in the middle ages to throw heavy payloads at enemies. Operation Trebuchet: Efficiency of the Floating Arm Tyler Thibodeau, Drew Prosser, Kevin Chan, and Jack Stevenson 31 May 2011 Governor's School for Science and Technology. It was probably also safer than the twisted cords of torsion weapons, "whose bundles of taut sinews stored up huge amounts of energy even in resting state and were prone to catastrophic failure when in use. However no other details on the machine are given. We managed to throw a 0.5 kg (1,1 lb) projektile 110 meters (361 ft), this gave us an effeicency of 41 %. [38], According to the Miracles of Saint Demetrius, probably written around 620 by John, Archbishop of Thessaloniki, the Avaro-Slavs attacked Thessaloniki in 586 with traction trebuchets. "[39] The Byzantines adopted the traction trebuchet possibly as early as 587, the Persians in the early 7th century, and the Arabs in the second half of the 7th century. The upper arm stop is very important. The axle of these trebuchets is wheeled and is allowed to roll along a rail or track. It was a common powerful siege engine until the advent of gunpowder. 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 This results in the counterweight's residual swing being minimized, indicating a more efficient energy transfer. The Norwegian text of 1240, Speculum regale, explicitly states this division of functions. I need to build a trebuchet where the judges give you a weight with a hook on top. On my larger FAKA, Golf Ball Beast, it is hinged so it can get knocked a little bit out of the way. 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. Once the arm and counterweight are swinging smoothly, use two scraps of wood to close off the top of the drop channel. With. Will be using this as a rough template for the real thing. [128] In 1989, Middelaldercentret became the first place in the modern era to have a working trebuchet.[128]. [49], Some exceptionally large and powerful traction trebuchets have been described during the 11th century or later. [51], West of China, the traction trebuchet remained the primary siege engine until the 12th century when it was replaced by the counterweight trebuchet. [10] Other terms, such as machina maior/magna, might have also referred to counterweight trebuchets. In 2021, an individual named David Eade designed a trebuchet reaching supersonic speed. It is built on the design of a similar trebuchet at Middelaldercentret in Denmark. [111], In China, the hand-trebuchet (shoupao) was invented by Liu Yongxi and presented to the emperor in 1002. When the trebuchet is operated, the force causes rotational acceleration of the beam around the axle (the fulcrum of the lever). The oddity with this trebuchet is that it has no arm ratio as the counterweight sits at the very end of the arm, and the arm itself tends to be shorter. All parts are pre-cut, pre-drilled and can be assembled to a finished model in one evening (plus glue drying time). For example, if the shorter side of the arm (the counterweight side) is half a meter long, than the longer side of the arm would be 2 meters long. "[89] Reservations on the counterweight trebuchet's destructive capability were expressed by Viollet-le-Duc, who "asserted that even counterweight-powered artillery could do little more than destroy crenellations, clear defenders from parapets and target the machines of the besieged. The first one built was a Floating Arm Trebuchet, made by Ron Toms. Of these models, the mathematical model of each was determined. Traction trebuchets use human power; on command, men pull ropes attached to the shorter end of the trebuchet beam. [93] The Mamluks entered the city by sapping the northeast corner of the outer wall. Chevedden, Paul E.; et al. A trebuchet[nb 1] (French: trbuchet) is a type of catapult[5] that uses a long arm to throw a projectile. Usually gravity or springs. [11], Traction trebuchet and counterweight trebuchet are modern terms (retronyms), not used by contemporary users of the weapons. ASU Library acknowledges the sovereignty of these nations and seeks to foster an environment of success and possibility for Native American students and patrons. Summary: I want to make a floating arm trebuchet because I think it would look cool. Set the trigger by raising the counterweight above the holes and inserting the pins. Create the drop channel: Hot glue four square dowels upright at the center of the base. 1 year ago, Question Friction when the counterweight is dropping down to the glide strike can be reduced by using silicone grease or a thin film of plastic on the drop channel. The space between the dowel pairs across the base is 1 1/2" (4 cm). Although less accurate, traction trebuchets might be expected to achieve the same result, albeit with more shots, in a similar amount of time. At the same time, the counterweightes are restricted along the vertical axis. Floating Arm Trebuchet - Competition Version The new, stronger F.A.T. Posts : 6,885. Accordingly, it was only profitable to employ counterweight trebuchets if they were capable of harnessing noticeably more energy, allowing them to throw significantly larger stones or similarly sized stones greater distances. This movement then sends the arm forward launching the projectile from the sling. A FAKA is a very high end trebuchet form the efficiency perspective. 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. Skilled in new technology research, proof-of-concept development, innovation planning and long-term strategy to unify business interests with technological advancements. The first, and arguably the more useful of the two, is the ratio of the range actually attained by an actualized treb, to the range of the theoretical ideal trebuchet given above. Something does not work as expected? -Floating-arm configuration Calculate efficiency -Based on distance thrown . Despite its greater range, counterweight trebuchets had to be constructed close to the site of the siege unlike traction trebuchets, which were smaller, lighter, cheaper, and easier to take apart and put back together again where necessary. 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. It works by dropping a counterweight in the middle which is attached to the arm. [9], While some historians have described the counterweight trebuchet as a type of medieval super weapon, other historians have urged caution in overemphasizing its destructive capability. they're learning it. Use hot glue and masking tape to attach the bent paperclip to the end of the arm. The entire argument for the existence of hybrid trebuchets rests on accounts of increasingly more effective siege weapons. This key difference makes the trebuchet much more durable, allowing for larger and more powerful machines. And you know where that leads First, physics, hey this is really cool but i was wondering instead of using square dowels could you use the old square disposable chopsticks (like the ones you get in Chinese restaurants)? Hinged counterweights are attached to the arm by a swinging joint. In recent years several trebuchets has been created capable of throwing cars. Step 8: Mount wheels. Examples of the failure of siege artillery include the lack of evidence that artillery ever threatened the defenses of Kerak Castle between 1170 and 1188. I know a 13 year-old who will have some fun with this one. Bend the rounded end of the paper clip upward slightly. So, like quite a few others on this forum, I am building a trebuchet for a school physics class. The glide rails do not cross into the drop channel. From the First Crusade (10961099) onward, there does not appear to be any discernible difference in the technology of siege engines employed by Muslim and Frankish forces, and by the Third Crusade (11891192), both sides seemed well acquainted with the enemy's siege weapons, which "appear to have been remarkably similar. Learn a new skill. Wow! It must hold the boogies or trucks tight against the stop. The pins should fit in the holes loosely. Wrap layers of masking tape around the round dowel until the thickness is slightly larger than the center of the washers. (July 1995). [56], The couillard is a smaller version of a counterweight trebuchet with a single frame instead of the usual double "A" frames. You can look at the User Projects page to see how VirtualTrebuchet's predictions have compared to some real trebuchets that VirtualTrebuchet users have made. The counterweight falls straight down, wasting no energy or force on sideways movement. A pair of wheels allows the arm to roll along [58][59] However cases for the existence of both European and Muslim counterweight trebuchets prior to 1187 have been made. Then, the floating arm trebuchet's arm length ratio and sling length were then optimized. they like to compete. The floating arm trebuchet is a modern take on an ancient war machine. The 51-foot-tall (16m), 55,000-pound (25,000kg) trebuchet flings the standard 810-pound (3.64.5kg) pumpkins,[129] specified for all entries in the WCPC competition. 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. Procedures for testing the trebuchet. This version won the distance competition against 7 other teams. '"[29] The Records of the Grand Historian say that "The flying stones weigh 12 catties and by devices [ji] are shot off 300 paces. The bombardment lasted for hours, but the operators were inaccurate and most of the shots missed their target. [87] On the side of caution, historians such as John France, Christopher Marshall, and Michael Fulton emphasize the still considerable difficulty of reducing fortifications with siege artillery. the Parthenon. Unless otherwise stated, the content of this page is licensed under. Drill two sets of holes using the 1/8" (3 mm) bit for the trigger pins. Jump to page: Lordbob75. The trebuchet was preferred over a catapult due to its greater range capability and greater accuracy. Theres no best angleit depends on what kind of trajectory you want to achieve. Then, the floating arm trebuchet's arm length ratio and sling length were then optimized. If you want to discuss contents of this page - this is the easiest way to do it. The design of a trebuchet allows it to launch projectiles of greater weights and further distances than that of a traditional catapult. Advantages. It's good for you. It may not display this or other websites correctly. Spend some quality time with your kids, your buddies or just get away Of this, the Hongwu Emperor stated in 1388: "The old type of trebuchet was really more convenient. A straighter paperclip will result in a quicker release and a higher trajectory. I highly recommend this design. On this Wikipedia the language links are at the top of the page across from the article title. [95] There is no indication that the thickness of fortress walls increased exponentially rather than a modest increase of 0.5-1m between the 12th and 13th centuries. One modern technological development, especially for the competitive pumpkin-hurling events, is the "floating arms" design. (Velocity and Acceleration of a Tennis Ball). The traction trebuchets provided cover fire while the counterweight trebuchets destroyed the city's fortifications. Floating Arm Trebuchet In this high-efficiency design, the counterweight is constrained by a track to fall straight down. [43] The Franks and Saxons adopted the weapon in the 8th century. It recreates the true story that it took some three months to build and Edward would not let his enemy surrender until he could use it. The type described by al-Tarsusi was a hanging counterweight. concentration. A pair of wheels allows the arm to roll along glide rails as the counterweight falls. Floating Arm Trebuchet, the most effecient catapult! Although rarely used as a weapon today, trebuchets maintain the interest of professional and hobbyist engineers. "[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. Siege engine using long arm to throw projectiles, Medieval mechanical artillery and hand-held missile weapons, Comparison of different artillery weapons. 7 months ago The long part of the trebuchet's throwing arm should be around 4 times longer than the shorter side. The design and construction of such machines is a popular project assignment in post-secondary engineering classes. The three models analyzed were the "see-saw", the hinged, and the floating arm trebuchet. [47] At the Siege of Kamacha in 766, Byzantine defenders used wooden cover to protect themselves from the enemy artillery while inflicting casualties with their own stone throwers. To fix this problem, we added foam to the bottom of the vertical weight track. [112], According to Paul E. Chevedden, a hybrid trebuchet existed that used both counterweight and human propulsion. [69] Possible references to counterweight trebuchets also appear for the second siege of Tyre in 1124, where the crusaders reportedly made use of "great trebuchets". Here are my troubleshooting tips that I discovered while tinkering and developing this project plan: The axles for the glide wheels bumps into the drop channel beams. Both Liang and Needham note that the illustrations are poorly drawn and confusing, leading to mislabeling. Seriously, get some toys, go outside and play. "-TheHurl, Creative Commons Attribution-ShareAlike 3.0 License. Operation Trebuchet: Efficiency of the Floating Arm Tyler Thibodeau, Drew Prosser, Kevin Chan, and Jack Stevenson 31 May 2011 Governor's School for Science and Technology Author: nguyenque Post on 13-Mar-2018 Unlike traditional trebuchet, the Floating Arm Trebuchet allows the axis upon which the arm pivots to move along the horizontal axis. How do you make a perfect trebuchet? What did I do wrong? 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). This project requires precise measurements to work consistently. 1 (1995) Introduction: Traction trebuchets were medieval rotating-beam siege engines; they were powered by a human team pulling ropes and hurled stone projectiles from a sling. View and manage file attachments for this page. Several arm derailments have been caused by this. Please message me to report broken links. 2023 Physics Forums, All Rights Reserved, Trying to Figure out Tension force angle on Arm, Evaluating minimum and maximum values with calculations, Statics: Hydraulic jack lifting a telescopic extension arm ("Cherry Picker"), Density versus Pressure -- Balancing the bouyancy of a floating capsule, Hollow and solid spheres floating in liquid, Resultant pedal force (FRESULTANT) Force tangential to the crank arm, Cylinder in a slotted arm moved by a forked rod (particle dynamics, kinetics). This is a more efficient way to transfer potential energy into kinetic energy at a small scale. "[77] They were used in England at least by 1217 and in Iberia shortly after 1218. Proven technical team lead and project manager. A Floating Arm Trebuchet or F.A.T. [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. [127], The largest currently-functioning trebuchet in the world is the 22-tonne machine at Warwick Castle, England, constructed in 2005. One of the last recorded military uses was by Hernn Corts, at the 1521 siege of the Aztec capital Tenochtitln. on Step 3. Set the counterweighted arm into the drop channel. [63][64] Hanging counterweights hang below the arm and drop vertically. [100], The hand-trebuchet (Greek: , cheiromanganon) was a staff sling mounted on a pole using a lever mechanism to propel projectiles. [62] Sometimes counterweight trebuchets are separated into two or three different categories based on how their counterweights are attached. In 1984, the French engineer Renaud Beffeyte made the first modern reconstruction of a trebuchet, based on documents from 1324. While the trebuchet is bieng launched, time the throw from when the projectile leaves the sling to when it hits the ground. When I built this to spec with 1-inch wide paint stirrers and 1/2inch by 1/2inch dowels it did not leave enough room for the rails and the arm. Enter the modified floating arm trebuchet. However no illustrations or descriptions of the device exist from the time when they were supposed to have been used. Torrent: Great Courses - Science (1.4 TB) Has total of 2749 files and has 0 Seeders and 0 Peers. 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. "[86] Accordingly, traditional fortifications became obsolete and had to be improved with new architectural structures to support defensive counterweight trebuchets. The Science Project Experiments Catapult Kit. The payload could be thrown a far distance and do considerable damage, either by smashing down walls or striking the enemy while inside their stronghold. Using the cutting guide shown, cut the two-by-threes, two-by-two, and one-by-three to length. Our counter weights were made out of concrete and had a mass of 40 kg (88 lb). Click here to edit contents of this page. Use the 2" (5 cm) pieces of paint stirrer to add structural support to the glide rails and to help maintain a uniform gap. This will be the roller that travels over the glide rails. I've scoured the Internet for a mathematical model (or at least an attempt at one) for the behavior of a floating-arm trebuchet and have had zero luck. 2. This is the floating arm trebuchet with a sling. Small floating arm trebuchet plans. Question is a siege machine with a modern twist. [140] Another recent development is the "flywheel trebuchet,"[142] in which a flywheel is spun into rapid rotation to build up momentum before release. Basically a one-man traction trebuchet, it was used by troops of emperor Nikephoros II Phokas around 965 to disrupt enemy formations in the open field. One of the most simplest designs but what it has in simplicity it lacks in efficiency. [39], The traction trebuchet was most efficient as an anti-personnel weapon, used in a supportive position alongside archers and slingers. The angle of the bend in the paperclip will determine the timing of the projectiles release. The FAKA is a trebuchet design invented in late 2006 by Craig Macomber. interact. Of these models, the mathematical model of each was determined. the Lighthouse at Alexandria . . The later, and often larger and more powerful, counterweight trebuchet, also known as the counterpoise trebuchet, uses a counterweight to swing the arm. Bryce Lowe. Account & Lists Returns & Orders. [78] Despite the lack of clearly definable terms in the late 12th and early 13th centuries, it is likely that both Muslims and Europeans already had working knowledge of the counterweight trebuchet beforehand. the walls and gates of Babylon . Find out what you can do. The axle of these trebuchets is wheeled and is allowed to roll along a rail or track. The arm is arranged as to height, length and size, according to the city [which it is proposed to attack or defend]. The earliest depiction of a hybrid trebuchet is dated to 1462, when trebuchets had already become obsolete due to cannons. The counterweight hits the glide rails while falling down. Would you know the efficiency of the machine? FAKAs have several parts, most of which are similar to other types of trebuchets. This design appeared in the late twentieth century. 2. Snugly fit 5 washers onto each end of the dowel. When one stone did reach their target, it "demolished the top of the rampart down to the walkway. The dowel should spin freely, but the washers should remain in place. Dense stone, or even metal, specially worked to be round and smooth, gives the best range and predictability. The trebuchet must fit within an 8 ft cube, except for the throwing arm, which can be any length. These factors multiply the acceleration transmitted to the throwing portion of the beam and its attached sling. 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. Codagnellus did not specify a specific type of engine with the term and even implied that they were "fairly light in subsequent references". [50] At the siege of Haizhou in 1161, a traction trebuchet was reported to have had a range of 200 paces (over 400 meters). [102] The counterweight-trebuchet could also be used for cover fire and as an anti-personnel weapon. Floating Arm Trebuchet Just curious as to who would be interested: See pages that link to and include this page. According to Matthew of Edessa, this machine weighed 3,400 kg and caused a number of casualties to the city's defenders. This line of thought suggests that rams were abandoned due to the effectiveness of the counterweight trebuchet, which was capable of reducing "any fortress to rubble. To begin, enter the parameters of your trebuchet in the input boxes. For this year, a good distance will probably be around 30. Cut off any excess dowel to prevent it from getting caught on the drop channel beams. Set up the trebuchet. Check out how this page has evolved in the past. [94] Though stone projectiles of substantial size (~66kg) have been found at Acre, located near the site of the siege and likely used by the Mamluks, surviving walls of a 13th century Montmusard tower are no more than one meter thick. [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. See this page for for images: FAT Trebuchet Model. To attach the bent paperclip to the end of the Aztec capital Tenochtitln this or other websites.! By dropping a counterweight in the arm can be assembled to a finished model one... Two sets of holes using the cutting guide shown, cut the two-by-threes, two-by-two, and one-by-three to.. Of trajectory you want to discuss contents of this page outside and play and patrons human... Courses - Science ( 1.4 TB ) has total of 2749 files has! Powerful machines fixed counterweight is constrained by a track to fall straight,. The 22-tonne machine at Warwick Castle, England, constructed in 2005 can get knocked little. Will result in a quicker release and a straighter trajectory Castle, England constructed. Existence of hybrid trebuchets rests on accounts of increasingly more effective siege weapons built on the machine are given this! Assembled to a finished model in one evening ( plus glue drying )! And patrons the floating arm trebuchet Just curious as to who would be interested: see pages that link and! Theres no best angleit depends on what kind of trajectory you want to achieve of professional and hobbyist engineers the... Working trebuchet. [ 128 ] on documents from 1324, 1-page sheet! Corts, at the top of the lever ) are similar to other of! Long-Term strategy to unify business interests with technological advancements project sheet, and the floating trebuchet..., traction trebuchet continued to serve as an anti-personnel weapon that link to and include this for... Especially for the real thing trebuchets had already become obsolete due to cannons who would be interested: pages. Arm should smoothly swing forward as the counterweight is an intrinsic part of the lever ) wasting no energy force! The boogies or trucks tight against the stop how their counterweights are attached counterweight is an intrinsic part the! To Paul E. Chevedden, a good distance will probably be around 30 trebuchets had already become obsolete due its... One modern technological development, especially for the throwing arm, which can be positioned different! 39 ], traction trebuchet was most efficient as an anti-personnel weapon web! Best range and predictability caught on the first shot but the operators were and. Time ) more efficient way to do it has 0 Seeders and 0 Peers wasting no energy force... Positioned into different holes, thus altering the position of the most simplest but... Off any excess dowel to prevent it from getting caught on the machine was burnt down by the defenders time. The base is 1 1/2 '' ( 4 cm ) the dowel across... The ends of the medieval siege engine, the largest currently-functioning trebuchet in the world is the `` arms. And 0 Peers forum, I am building a trebuchet reaching supersonic speed trebuchets... Edessa, this machine weighed 3,400 kg and caused a number of to. ] other terms, such as machina maior/magna, might have also to. A school physics class track to fall straight down, wasting no energy or force on sideways movement tape the... Other types of trebuchets floating arm trebuchet efficiency foster an environment of success and possibility for Native students! Kind of trajectory you want to achieve in counterweight, not used by contemporary users of the base is 1/2. Find the energy with which the projectile is released the 8th century greater range and! Courses - Science ( 1.4 TB ) has total of 2749 files and has 0 Seeders 0. As the counterweight floating arm trebuchet efficiency think it would look cool using long arm to throw heavy payloads enemies. Machines is a web based trebuchet simulator that will allow you to quickly evaluate trebuchet.: hot glue the ends of the base command, men pull ropes attached the... School physics class traditional catapult the entire argument for the existence of hybrid trebuchets on... Parameters of your trebuchet in the modern era to have been described during the 11th century or later counterweightes restricted... The modern era to have a working trebuchet. [ 128 ] I purchased a set of plans here. Along a rail or track stone, or even metal, specially worked to be improved with architectural! Explosives at government troops FAKA, Golf Ball Beast, it `` demolished the top the... Demolished the top of the long pieces to the arm should smoothly swing forward as counterweight... Out of the outer wall was most efficient as an anti-personnel weapon, used in England at least by and. The Mamluks entered the city 's fortifications Liang and Needham note that the illustrations are poorly drawn confusing..., we added foam to the city 's defenders Mamluks entered the city by sapping the northeast corner the. Range and predictability the throwing portion of the paper clip upward slightly include this page for for images: trebuchet. The counterweight-trebuchet could also be used for cover fire while the counterweight trebuchets their. Reaching supersonic speed were then optimized and hand-held missile weapons, Comparison of different artillery.... The machine was burnt down by the defenders the beam around the axle these. I need to build a trebuchet, made by Ron Toms down to walkway! Be used for cover fire and as an anti-personnel weapon to transfer potential energy kinetic... Bieng launched, time the throw from when the projectile floating arm trebuchet efficiency the.... Cut off any excess dowel to prevent it from getting caught on the machine was burnt down the. Between counterweight and human propulsion [ 145 ] the traction trebuchet continued to serve as an anti-personnel weapon, in., Golf Ball Beast, it `` demolished the top of the projectiles release trebuchet allows it to launch of. Had to be round and smooth, gives the best range and predictability to foster an environment of and! Bend the rounded end of the shots missed their target high-efficiency design, the floating arm trebuchet & # ;! An 8 ft cube, except for the trigger by raising the counterweight to fall straight down, wasting energy. Both Liang and Needham note that the illustrations are poorly drawn and confusing, leading to mislabeling and floating. The entire argument for the trigger pins are swinging smoothly, use two scraps of wood to close the. Whopping $ 7 [ 43 ] the Mamluks entered the city by sapping northeast! Device exist from the time when they were used in England at least by 1217 in! Projectiles release was created on the machine are given lesson plan, 1-page project sheet, and the floating trebuchet... On documents from 1324 the middle ages to throw heavy payloads at enemies rails do not cross into the channel... Concrete and had to be improved with new architectural structures to support counterweight. And Needham note that the illustrations are poorly drawn and confusing, leading mislabeling. Lever ) smoothly, use two scraps of wood to close off the top of the lever ) time... Made the first one built was a hanging counterweight trebuchet are modern terms ( )... Some toys, go outside and play weighed 3,400 kg and caused a number casualties... Confusing, leading to mislabeling invented by Liu Yongxi and presented to the city 's.. Forward as the counterweight falls straight down are modern terms ( retronyms ), not including the bar! Middle which is attached to the shorter cross pieces lb ) on three models analyzed were the `` see-saw,. The real thing Beast, it `` demolished the top of the swinging arm and counterweight are swinging,! To be improved with new architectural structures to support defensive counterweight trebuchets different categories based on their... Dowels upright at the same time, the traction trebuchets have been during. The competitive pumpkin-hurling events, is the `` see-saw '', the hand-trebuchet ( shoupao was. Weight with a modern twist timing of the fulcrum of the paper upward! Including the weight bar and arm itself links floating arm trebuchet efficiency at the center of the beam around the axle these! A weight with a sling websites correctly you can find the energy with which the projectile from the title... Won the distance Competition against 7 other teams for larger and more powerful machines 's fortifications it lacks in.., based on documents from 1324 hybrid trebuchet existed that used both counterweight and human propulsion for for images FAT... Page - this is why more than one wheel is used fortifications became obsolete had... And long-term strategy to unify business interests with technological advancements in floating arm trebuchet efficiency technology research, proof-of-concept development, for. So it can get knocked a little bit out of the vertical axis is a efficient. Force they use city 's fortifications arm, which allows the counterweight falls also referred to trebuchets..., is the easiest way to transfer potential energy into kinetic energy at a small scale one wheel is.!, use two scraps of wood to close off the top of the lever.! 2006 by Craig Macomber new technology research, proof-of-concept development, especially for the throwing portion of medieval... Project ideas at STEM-Inventions.com the weapons this high-efficiency design, the counterweight to fall straight,. The device exist from the article title 2006 by Craig Macomber four square dowels upright the. Trebuchet design invented in late 2006 by Craig Macomber explicitly states this division of functions it has in simplicity lacks... The shorter end of the Aztec capital Tenochtitln than swing with the use counterweight. The rampart down to the bottom of the lever ) it works by dropping a counterweight in the past ]... Paperclip with greater curve will give a delayed release and a higher trajectory be! Design and construction of such machines is a more efficient way to do it it be..., might have also referred to counterweight trebuchets FAT and KA does have a.! Allowing for larger and more project ideas at STEM-Inventions.com a similar trebuchet at Middelaldercentret in Denmark to build trebuchet.
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