Giving it a great advantage when converting potential energy to kinetic energy. Give the trigger a swift tug to release the pins! Usually gravity or springs. [30] It seems that during the early 7th century, improvements were made on traction trebuchets, although it is not explicitly stated what. Published 7 years ago. Find out what you can do. In reality it will be in the low 30's somewhere. '"[29] The Records of the Grand Historian say that "The flying stones weigh 12 catties and by devices [ji] are shot off 300 paces. A floating arm Trebuchet allows a straight drop of the counterweight which results in more efficiency. The projectiles were several feet in diameter, and when they fell to the earth they made a hole three or four feet deep. [62] Sometimes counterweight trebuchets are separated into two or three different categories based on how their counterweights are attached. Known as the Huihui trebuchet (, where "huihui" is a loose slang referring to any Muslims), or Xiangyang trebuchet () because they were first encountered in that battle. Here are some stats, note that these apply to the original #2 treb. [100], The hand-trebuchet (Greek: , cheiromanganon) was a staff sling mounted on a pole using a lever mechanism to propel projectiles. "It'sThe Hurl itself that matters! [146], In 2014, during the Hrushevskoho street riots in Ukraine, rioters used an improvised trebuchet to throw bricks and Molotov cocktails at the Berkut. As their construction is substantially simpler than modern weapons, trebuchets also serve as the object of engineering challenges. Click here to toggle editing of individual sections of the page (if possible). [103][105], Rather than replace traction trebuchets, counterweight trebuchets supplemented them in a different role. Step 5: Drill holes for axles. Trebuchets were still used both at the siege of Burgos (14751476) and siege of Rhodes (1480). The first one built was a Floating Arm Trebuchet, made by Ron Toms. Both the traction and counterweight trebuchets have been called mangonel at one point or another. Step 4: Assemble trebuchet sides. A second component is the height that the axle will be placed above the platform of the trebuchet. Read the documentation or contact us. Bend the rounded end of the paper clip upward slightly. General wisdom has a 5:1 ratio being the norm for a standard trebuchet, although 4:1 is sometimes used. A floating arm Trebuchet allows a straight drop of the counterweight which results in more efficiency. Trebuchet instructables the floating arm trebuchet lancemakes the oating arm trebuchet is modern take on an ancient war machine. Trebuchet - Rose-Hulman. you can. This project requires precision to work consistently. Thanks for sharing! It may not display this or other websites correctly. The illustration above gives a diagram of a "floating-arm" trebuchet. Theres no best angleit depends on what kind of trajectory you want to achieve. They were used as defensive weapons stationed on walls and sometimes hurled hollowed out logs filled with burning charcoal to destroy enemy siege works. [74][75][76] Though soon after, clear evidence of counterweight machines appeared. Summary: I want to make a floating arm trebuchet because I think it would look cool. On this Wikipedia the language links are at the top of the page across from the article title. [17] The trebuchet had further modifications to allow an increase to its range, by creating a slot for the sling and projectile to sit underneath the trebuchet, enabling the sling to be lengthened and thus extending the range, an alteration in the trajectory, or the release point to be changed. It stands for Floating Axle King Arthur. The walking arm trebuchet is a good example, which uses an unconventional design to great effect. The three models analyzed were the "see-saw", the hinged, and the floating arm trebuchet. It works by dropping a counterweight in the middle which is attached to the arm. Jump to page: Lordbob75. Their slower shooting rate and greater mass made them more difficult to reposition, or even yaw, leaving few incentives to employ a small counterweight engine rather than a comparable traction type. Then, the floating arm trebuchet's arm length ratio and sling length were then optimized. 6 years ago. This results in the counterweight's residual swing being minimized, indicating a more efficient energy transfer. [27][82] The earliest definite mention of the counterweight trebuchet in China was in 1268, when the Mongols laid siege to Fancheng and Xiangyang. The upper arm stop is also a problem because after the throw the hanger can slam into it quite hard. 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. [92] As late as the Siege of Acre (1291), where the Mamluk Sultanate fielded 72 or 92 trebuchets, including 14 or 15 counterweight trebuchets and the remaining traction types, they were never able to fulfill a breaching role. [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. It first appeared in China in the 4th century BC. We launched pumpkins and bowling balls around 10-15 lbs at distances of 300+ feet. Append content without editing the whole page source. A trebuchet[nb 1] (French: trbuchet) is a type of catapult[5] that uses a long arm to throw a projectile. Drill four 1/4" (6 mm) holes into a square dowel. Model [93] The Mamluks entered the city by sapping the northeast corner of the outer wall. Make 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. Super awesome! Prior to 1268, the counterweight trebuchet may have been used in 1232 by the Jurchen Jin commander Qiang Shen. Power Source. In 2021, an individual named David Eade designed a trebuchet reaching supersonic speed. The traction trebuchets provided cover fire while the counterweight trebuchets destroyed the city's fortifications. This movement then sends the arm forward launching the projectile from the sling. This is the floating arm trebuchet with a sling. This design appeared in the late twentieth century. [140] Another recent development is the "flywheel trebuchet,"[142] in which a flywheel is spun into rapid rotation to build up momentum before release. Any questions? Looks like a lot of fun ! On my larger FAKA, Golf Ball Beast, it is hinged so it can get knocked a little bit out of the way. How's that for a reason? The axle of these trebuchets is wheeled and is allowed to roll along a rail or track. 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 further between them the better they will reduce this twisting. 1 year ago, Question Since you don't know what the best possible range efficiency is, what you should do is set a reasonable goal for yourself based on the results of last year's nationals winners. "[38] Evidence from Gaul and Germania suggests there was substantial loss of skills and techniques in artillery further west. The range given for projectiles are 300, 180, and 120 feet. I'm tired of culling search hits for kits and plans being peddled by entities that have no concise explanation for FAT principles and operation. They were used as ship mounted weapons by 573 for attacking enemy fortifications. The floating arm trebuchet is a modern take on an ancient war machine. Confusion between the onager, mangonel, trebuchet, and other catapult types in contemporary terminology has led some historians today to use the more precise traction trebuchet instead, with counterweight trebuchet used to distinguish what was before called simply a trebuchet. Traction trebuchets were to be used for hitting people in undefended areas. View and manage file attachments for this page. Of this, the Hongwu Emperor stated in 1388: "The old type of trebuchet was really more convenient. I'm a writer, maker, and educator who's on a mission to better the world through hands-on engineeri, seven 12" (30.5 cm) square dowels, 1/2" (1.3 cm) wide, Strap-On Cleats for Ice and Snow Traction, Hollow Wood Surfboard - Plywood and Cedar, Cut two 12" (30.5 cm) paint stirrer into four 6" (15 cm) pieces, Split two of the 6" (15 cm) pieces down the middle, Cut the bottom of the split pieces at approximately a 45 angle, Cut 2 paint stirrers into four 5" (12.5 cm) pieces, leaving two 2" (5 cm) pieces. Drill two sets of holes using the 1/8" (3 mm) bit for the trigger pins. A Floating Arm Trebuchet or F.A.T. The difficulties of coordinating the pull of many men together repeatedly and predictably makes counterweight trebuchets preferable for the larger machines, though they are more complicated to engineer. Most accounts of traction trebuchets describe them as light artillery weapons while actual penetration of defenses was the result of mining or siege towers. The floating arm trebuchet uses a counterweight the vertically falls down a shaft created by two pieces of wood. This increases he overall efficiency of the trebuchet. Jiang Xingben participated in the construction of siege engines for Taizong's campaigns against the Western Regions. Parents and kids need to Floating Arm In this design the counterweight is constrained by a track to fall dead vertical, and the entire throwing arm, running on wheels set in a horizontal track, shifts to accomodate the counterweight. I just subscribed because I like that you have so many mechanical contraption based Instructables. 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. doctor with a keen knack for investing, all because someone bought him 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. 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. Click here to see our complete line of models and kits. Share it with us! Create the trigger by tying one 30" (76 cm) piece of string to two 2" (5 cm) pieces of bamboo skewer. FAKAs are hard to build, and have have a tendency to go very wrong, and often break things, if the timing is a little off. I would like to work on the floating arm trebuchet because the design of it is more interesting and In southern France during the Albigensian Crusade, sieges were a last resort and negotiations for surrender were common. Unlike traditional trebuchet, the Floating Arm Trebuchet allows the axis upon which the arm pivots to move along the horizontal axis. See this page for for images: FAT Trebuchet Model. concentration. (14 pages!) Wikidot.com Terms of Service - what you can, what you should not etc. [145] The trebuchet was used to project explosives at government troops. Wow! Append content without editing the whole page source. Giving it a great advantage when converting potential energy to kinetic energy. :p. I've never seen this "floating arm" style of trebuchet before. How to Simulate a Trebuchet Part 3: The Floating-Arm Trebuchet The illustration above gives a diagram of a "floating-arm" trebuchet. So while counterweight trebuchets require significantly fewer men to operate than traction trebuchets, they require significantly more time to reload. The 5 degrees of freedom are the x and y coordinates of the projectile, the height of the counterweight, and the sling and arm angles. When the trebuchet is operated, the force causes rotational acceleration of the beam around the axle (the fulcrum of the lever). The floating arm trebuchet is a counterweight siege weapon which is a modern variation of the medieval trebuchet. 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. Jurchen Jin commander Qiang Shen walls and sometimes hurled hollowed out logs filled with burning charcoal to destroy siege. See this page for for images: FAT trebuchet model here to editing... 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