Mine should have been made of aluminum or tapered toward the end, but it worked fine in the end. This was a bit too heavy as we had to load each weight manually to fire our trebuchet. at this point, we used a ratchet to tighten the eye bolt, until the chain was in tension and the weight bar no longer made contact with the safety bars. Web50 Trebuchet and Catapult ideas | catapult, floating arm trebuchet, catapult project Trebuchet and Catapult 49 Pins 4y S Collection by Dan Shepherd Similar ideas popular now Woodworking Warriors Illustration Science Projects School Projects Projects To Try Engineering Projects Wood Projects Medieval Crossbow Medieval Weapons Packing So bad. Webconfigurations for the trebuchet: 1. It's the same process of cutting slits, hammering out the wood and sanding it smooth. Basically, put them in the corner where the main track supports and the track meet. Since one is steeper than the other, this meant that the vertical height ended up different. I want a 3.5:1 ratio and 7 ft long total beam. Axel for the masses is coathanger wire but ensure the axel never absobs the full impact of the falling masses as it will bend. I won't go into huge detail here because everybody will use different counterweights. The idea of inserting a trebuchet into the dynamics You can pretty much change the positions of these pieces as much as you want, but the positions they are in now worked great for me. The third clip in the video shows this problem well- the arm kind of rolled over and on top of the guide blocks because they were too high. 2 segments of 5 ft., 10 in (1.7272 m) long 2 X 4 So, if you want them to be the same height, you may need to change the angles or the lengths mentioned here. It includes what I used at the time. 8. This will prevent the counterweights from falling. Use a bowline. Whenever you feel like it, slip in the other trigger pin, with the eye toward the front. Use the order of bolts and washers on either side shown in the first picture (From inside to outside the order is) : drop channel, washer, bolt, washer, CW box wall, Washer, bolt, Bolt, washer, wall of CW box, washer, bolt. To reset the device, the counterweight must be raised back to the original height and locked in with the trigger mechanism. [2] This allows for a higher drop height for the counterweight,[2] which is allowed to fall down a sturdy linear vertical "drop channel". Push them up against the drop channel. Simple Table Top Catapult. 12. Make sure everyone knows you are firing. To get it in, you need some sort of head on it for the wrench. They would extend outward, just like the board chute. *It would be better if the two previous 1 X 6 pieces were 2 X 6, I'll explain later. First, obviously, just lay the arm in between the drop channels (Just the middle of the treb) 4. Drill the holes for the eye bolts. [2] The eye bolts are usually placed at the bottom of the frame, locking above the arm to prevent accidental release. *look at the last step: improvements. You want this to happen when your sling is at 45, and it will vary somewhat with projectile weight and counterweight.The sling itself and release pin are a bit of trial and error. First of all you need two people They flexed a lot and caused several problems when I was building the trebuchet. (Flanges would work here as an alternative) We added a tapered cut to the arm, going from 4x8 to 4x4 at the tip. These will be the drop channels but if you didn't (my bad) You need to recut the drop gap to 1/8" wider than the CW bar, cut the gap in the track slightly wider, and spread apart the track supports directly underneath the drop gap. BRs of from 3:1 through 8:1 have been used, but at the low end you lose drop and at the high end you run into geometric problems and frame instability. Make sure your projectile is in the sling (Yes we do forget that a lot) the ring is on the pin, the CW bolt won't get stuck on the eye bolts coming out of the drop channels and that the safety blocks are still in, along with the weights (Obviously) 4 segments of 4 ft., 5 in. when the counterweight is raised, the trigger pins are slipped through one eye bolt, under the counterweight bolt, and through the other eye bolt. 6 1/4 in. Tools Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz) New 08 Jul 2012 #21. Now, I believe that the width between the bottom of the main track supports is somewhere around 1 ft, 1 inch. And, I'm not looking to chuck this 200yds. Pulling this should make the trigger release. [2] The difference in the lengths of the two ends of the arm provides mechanical advantage. View on Taylor & Francis Save to Library Create Alert Cite One Citation Citation Type More (Should be square to the length of the board, like a crosscut.) Lastly, drill a hole through both the walls of each box at least two inches from the top edge for the counterweight bolt. 1. 4. FIRST PROBLEM on Introduction. I used the trebuchet frame as a fulcrum to lift it in the air. 16. Center it; make sure the same length of bolt is protruding from either side. Use a drill press if you are going to drill one hole because one hole needs to be better aligned than a bunch of smaller ones. Our starter model was 1/6 scale, it threw a bouncy ball 270 feet with 10 pounds of counterweight. (1.8796 m) long 2 X 4 Its 3.5 inch edge should also be 1/4" from the long edge of the 6 ft. long 1 x 6. Basically, lift the weight into the air using the arm as a lever and the seam in the arm close to the fulcrum. 20 yell heads up, countdown , just make sure everyone know you are firing. If you see or hear bumping, look carefully at this back area w/ a video camera or just your eyes to see why it's doing that. Then just hammer the dowels all the way into the holes. We're all a bit nerdy and geeky and figured a weekend engineering challenge was a good way to make camping and drinking more awesome. Lastly, hammer a nail anywhere into the end of the arm. Otherwise, I'd probably have a concussion because the folding trigger design released before we wanted it to. (0.635 cm) diameter, 6 in. cut about 6 inches from the edge, along the 7 ft. arm. If this happens, use it on a hill or place two very thin pieces of scrap wood under the base, directly under the drop channels. 5. Beside the arm when it's at rest, these two channels are the tallest point of the trebuchet. When you look at the picture, they are the big, tal Ok, now repeat the entire process mentioned above for the "short" side. Here's some vid of ours. Shims may be needed to level out the device. A thin steel cable might work better.Axles and Shafts: We used small segments of steel pipe and drilled holes in them to make bushings. long carriage bolts This one worked, but it was just a bit heavy, small and inflexible. 1. cut off about 8 inches from the leg of the jeans. The Floating Arm Trebuchet The trebuchet is a medieval gravity powered engine of siege warfare designed to hurl a projectile, such as a heavy stone or a diseased animal, at a distant target such as castles. jk. Always stand way back from the trebuchet, and keep the safety blocks in place until you are ready to fire. 5. Lower it below the base, just rest it on the floor. Wheels are from the rotating platform from a microwave but any small stong wheel will do. Make the arm from the 1/2" x 3" x 36" pine board. with that. Quickly, before the other guy gets sore holding the arm, the person on the trebuchet will need to slide some scrap 2 X 4s around a foot long over the gap in the track. 2 segments of 6 ft. (1.8288 m) long 1 X 6 This time, It's half the depth of 1 2 x 4, which is 0.75 (3/4) inches. look in improvements, may need to be changed Ask me if you have a question. You also need the braided polyester cord and the keychain ring. 10 1/4 in. You should also cut off the head if you keep getting downward throws no matter how you adjust it. I'm still working on the "improvements" page but everything I was going to mention on it was kind of already mentioned throughout the instructable. May need to be shortened, look at improvements Still, it was strong enough with all the gorilla tape. The person holding the arm up can relax. how long was the arm after the extension? Tie a figure 8 knot. You also will need to push them out slightly, so that the gap is 3/4" at least. 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. 2. Ok, so this is what the entire bulk of the trebuchet rests on. It's 6 feet long and 2 feet wide. And it is constructed with 1 X 6s That's its fa Spread them out evenly and make sure none of the holes go through the bolt holes. Okay now you need to cut the axle. [9] These machines and their designers are frequently to be found competing in various recreational events, for example, pumpkin chucking contests.[10][11][12]. Just find a pair of old jeans First, I'm going to talk about some other improvements that are more important than the arm. The first recorded use of traction trebuchets appeared in ancient China and were probably used by the Mohists ps-mohist are a scientific lead version of the chinese What is the floating arm Trebuchet, and how does it work? so then the long arm would be 3.5 times that (0.2413 X 0.2286m) The angle and length of the pin control when the sling opens. 2 screws for each mitered channel support. grab the last 3 ft, 6 in 2 X 4s. [3] If you Drill a 1/4 hole 20" from one end, in the middle of the board, as shown in Fig. 5.Next find the center of the folded edges. Mess around you'll figure it out. 2 segments of 6 ft., 2 in. GoochesVFD said that there was some cracking around the base of the long 2 X 4 used as the drop channel. The distance that it extends out from the diagonals affects the distance a lot. 8 matching cut washers 4 segments of 1 ft., 5 in. The Cardan gear was invented to accept linear motion from a steam piston to create circular motion. In larger designs, the trigger system is applied at the top of the drop channel. look out for flying cats Basically, THE CW BOLT MUST BE MADE STRONGER!! 17. Grab the trigger pins. long carriage bolts 9 years ago The straight track drop is an idea used in a FAT (Floating Arm Trebuchet), or in our Baby ASOK (Arm Slides Over Cam). NEEDS TO BE MADE THICKER: LOOK AT IMPROVEMENTS http://youtu.be/MS9OepeTELc, Reply 10. We built a trebuchet that we call the medieval stuff chucker (MSC). You should have a " Y " shape rope with a trigger pin on each end. 14. One thick nail. Lengths Lengths Angles Masses Density Copyright 2013, Eric Constans and Rowan University The principle behind this device is that the counter weight moves only vertically as the arm's axis moves along a horizontal rail on wheels. We are to have a constructed trebuchet and have it prepared to launch on Tuesday, April 23. 3 3 in. The classic beam ratio for a FAT is 2:1. They should come out easily if they were cut narrowly enough. I like getting comments. (0.3175 m) long 2 X 4 Trebuchet 3: An Improved Floating Arm Trebuchet. Line them up so that their 1.5 inch edge is adjacent to the edge of the 2 ft 1 X 6, and so that their 3.5 inch edge is on the outside cut edge of the long 1 X 6. I will be launching this in a range 200yds and I'm looking to toss under that because I will be demonstrating my trebuchet about 50yds or so from a football field and I will be tossing the weight towards the field and at the other end is a parking lot. The sling lines, I bough 50 ft because i needed to cut the right lengths for each ratio, you probably wont really need more than 15 ft. WebThe optimal ratio between the long part of the arm and the short part of the arm will depend mainly on the Mass of Weight. For me, for the side with the longer support, this was about 5 ft, 7 inches from the very bottom of the drop channel. ALSO, the base boards (I used 1 X 6) should be thickened. Their defining feature is free movement of an axle on the throwing arm, and a linear drop channel for the counterweight. You do not want this side to come undone, so make sure it's tied tightly to the end of the arm however you can. Use the top bolt for screwing in, and the bottom one for unscrewing. OK onto step 1 That's its fault. Alternatively, you could download the sketchup model, highlight the entire thing, scale it down and get the dimensions directly from there. It would also bend out of position because of the force of the swinging projectile. This may need to be changed Really hope we get the hooks and sling parts to make trebuchets wor I have to make a Trebuchet for my Engineering product, and it must be no more in height than 80cm, so what do you think are the best dimensions and ratios for it? Buy 15 2 X 4s to start off with, then buy more later. May need to be hanged if the diameter of the threaded rod is changed The eyes face inward. The two bits at the open top of the cut channel..keeps the drop channel from "opening" Because we are about to cut the tracks in half. It may have thrown some little thing off so just use your judgment about the angles. I'll post pictures as we get underway. The knot should be on the inside of the pouch. Trebuchet. Hopefully you'll use a wider bolt to begin with [5] Friction of the wheel on the arm axle against the glide track should be managed in a similar way. Now, let's get started actually building and attaching them. 3. Need some advice please. And do lots of testing, with a realllllly long trigger string. thick plywood, 2 ft., 5 in. common tools the next 3 specifically show the dimensions for the short side. Thanks for your appreciation :D I would love to check out the Medieval Stuff Chucker, but the link to the youtube video doesn't work. Best catapult ever (98 ft) Load more 3D Printer Info. NOW AND ONLY NOW take out the safety blocks. 50 pounds that was used here. *A few notes: the angles were based off of the sketchup model which had a few errors. WebA trebuchet is a device used in the Middle Ages to launch very heavy objects at opponents during battle. This will take more weight off of the long arm, which should be as light as possible. Then, obviously, drive in the screws. It shouldn't be too deep or to shallow for your projectile, and should hug the surface of your projectile well. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. Other than those, there haven't really been any problems with the frame. Cut these two twisting braces at around 1 ft 2 inches because the length of these will affect the width between the tops of the two drop channels. leaning, tilting marking, etc. Even though IT'S VERY DANGEROUS IF YOU DO IT INCORRECTLY!!) This is what fit for me. Raise the CW to the top and hold it there with your thigh (raise your leg to support it) and one hand. 2 segments of 8 ft (2.4384 m) long 2 X 4 Punch the holes centered as shown and directly on either side of the seam. First, pick one end of the trebuchet to be the back. I really appreciate your work in building this instructable. 7. simplest step. grab the last 3 ft, 6 in 2 X 4s. Line the short edge up with the 8 ft piece of the drop channel. They have the same orientation a The trigger pins keep the weight from falling. these are the trigger pinsWheels, weights Allow about 1 week before firing your trebuchet. 3. At the tip of the arm, we welded a steel box around it to hold the pin for the sling release and a loop to tie the other end of the sling rope to. To fix this, you get a thicker CW bolt, and hopefully a hardened one. If you need more help with the guide blocks let me know. [7] A projectile is loaded into a sling at the end of the throwing arm. Hi, read your comment, Need some advice please, if you don't mind. This way, the screws take force from top to bottom, not sideways. on Step 15, This is stellar. Really, be careful. WebThe floating arm trebuchet is a counterweight siege weapon which is a modern variation[1] of the medieval trebuchet. Arm-sling constraint, arm on fixed roller, projectile above ramp. (I had no idea what else to finish it off with. If you need to beef things up, like the counterweight bolt and wheels, it might cost more. 3 ft. (0.9144 m.) long 5/8 in. -Make sure it is strong enough to take the force of your falling counterweight. I'm sure this pouch design could be improved. Tape measure, ruler We made ours so that the chain had a tiny bit of slack in it initially, which we took out by tightening the nut on the eye bolt each time we fired. You can use a clamp and a tape measure in combination to figure out the right lengths before you cut them. 2 1/2 X 10 eye bolts I'd maybe assume 50% efficiency as a conservative estimate for the f2k (it's probably higher), so the initial kinetic energy of the projectile is equal to the gravitational potential energy of the falling counterweight times the efficiency. Have someone stand on the front half of the trebuchet. Punch two holes. To begin, enter the parameters of your trebuchet in I'm going to assume that you are drilling one long hole through all of the short arm pieces. slide the bolt the rest of the way through the other hole. nuts, coarse thread (8TH picture) Then tape them in place. 1). Then, using the claw hammer, hammer out these slivers of wood. This is essential for an efficient machine. The floating arm trebuchet is a counterweight siege weapon which is a modern variation of the medieval trebuchet. (15.24 cm.) Without one of them , the arm would simply fall into the ground. I did not have a drill bit long enough to go through all of the 2 x 4s of the short arm, so I had to drill individual holes in each individual 2 X 4 and hoped that they lined up. This means that 3 and 1/2 parts of the short arm plus the short arm itself equal the total length of my entire beam. Arm-sling constraint, arm on fixed roller, projectile on ramp. it would be much appreciated!! Additionally, I would make the arm as long as possible as well. Using the dimensioned drawings, estimate the amount of materials needed. Then, we cleared away and removed the safety bars, and fired. Now I'll tell you how to lock load and FIRE! Then drive 2 screws through the board with the actual channel on either side of the gap, diagonal from each other so that you can fit two into the narrow width of the wood on either side of the gap. To cut the tracks, mark a 3/4" gap that is aligned with the drop channel gap and the support directly below. Line up the pieces of plywood and drill holes through everything for the carriage bolts. Now, cut very carefully and very straightly down the lines you made. Once the higher edge is at the height mark you made, trace a line on the diagonal down the mitered side support. I've seen some really nice f2k's that have the wheels jump the gap on a ramp, but that would require much more engineering calculations and dynamic tuning than we had time for. -----------(pouch)----------- One end is tied through a hole that's drilled in the end of the arm. Thanks for the great instructable! This allows us to swap out pins, or adjust forward and backward. 8. This is it. The part of the war machine that means business. The Arm. Luckily, It's also pretty simple to make. You need: 6 segments of 2 It's been 4 years since I built this in 8th grade (graduated high school by now), but its still lots of fun to set up and launch! Did you make this project? These are the trigger pins. hacksaw if you don't have a METAL CUTTING BLADE FOR YOUR JIGSAW, 1 segment of 7 ft. long 2 X 4 Now comes the moment of truth. i just copied that I will be modeling my trebuchet after your and would like to know Can the trebuchet launch a 2-lb dumbell? For trebuchets in general a mass ratio of between 80:1 to 160:1 can be used. Licensed under CC BY 3.0, via Wikimedia It was determined that the optimal arm length ratio was approximately 1:2, where the short You're going to have to do some testing and fiddling to find out what works best. As a starting point, cut these two diagonal supports, lateral and track-supporting To launch such a heavy projectile will require much more weight than the approx. If you really want to include them, they should also be cut about 3 inches longer, until you know what to cut. on Introduction, hey I'm a physics student trying to replicate your design. Use a wrench or hopefully a driver of some sort to drive the CW bolt all the way throughone drop channel, through the arm and out the other drop channel. Use your head before you lose your head Basically all I'm trying to tell you is: drill one hole with a drill press with a long enough drill bit through all of the boards of the short arm at once. wood screws, phillips head drive, #8 13. That was bad. Hopefully they're willing to help. I haven't seen much information on dynamic tuning for the f2k, but we did an estimate of the static loads at the critical points and kept the stresses around 1/4 of the yield strength of the steel.I'd also advise implementing a metal sheet on the rails, instead of bare wood. Before you do that, though, make sure that you are driving them in from the bottom. denim fabric If you want the diagonal to go exactly 1 foot out and 1 foot down from the corner, you need a more precise measurement, it's something like 1.41 feet. (0.4318 m) long 2 X 4 Short arm, washer, bolt, washer, wheels and bearings, washer, bolt. So if I could toss the weight a 100yds would be perfect. Then cut the axle about 3 inches shorter than the width. Consider how much weight you want to use, and size your shafts and frame accordingly. Ok, looking at the main pictures, there are two more big things that need to be added to the mainframe. You also might want to improve the pin system-at least make sure your pin is smooth. Look at the pictures to see this; it's kind of hard to explain the placement in words. Yeah, this happened to me. I have no idea if this is the most ideal design for this type of trebuchet. WebThe 5DOF Floating Arm Trebuchet This is the floating arm trebuchet with a sling. It launches 5 pound pumpkins around 320 feet with 250 pounds of counter weight. It wasn't the best design for very straight shots, but for me it worked very well. 1. Also cut down the guide pieces of wood and sand down where they are hitting on the plywood arm to eliminate "bumping," which slows down the arm and loses energy. A note about the guide blocks: 7. I would like to work on the floating arm trebuchet because the design of it is more interesting and D 8. First, grab your counterweight bolt (hopefully thicker than 5/8") and use some sort of clamp to keep it pushed up against the top piece of wood, as if it was being loaded. Arm-sling constraint, arm roller on fixed track, projectile on ramp. This is a more efficient way to transfer potential energy into kinetic energy at a small scale. Line the short edge up with the 8 ft piece of the drop channel. 11. Did you make this project? Additionally, the bending of the CW bolt meant that it was not perfectly aligned with the drop gap, so it would slow down and bump on the way down. less than on a longer, heavier arm, so you have more of an opportunity to make it extremely light, if that makes any sense. Get everyone away from the back and front of the trebuchet. Lemme know how to improve the instructable 50 ft. (15.34 m) of 3/16 (0.47625 cm) braided polyester cord so: Webagain revised in spring 2002 with the introduction of the Floating Arm Trebuchet. Trebuchet. on Introduction. It will differentiate depending on your ratio. 3/8 X 4 eye bolt (Including bolts) um.. WebFloating Arm Trebuchet. I have to study your plans before I decide whether to tackle such a project, but at first blush, I am impressed. While the floating arm design can have a lighter frame than a traditional trebuchet because the overall forces produces are less,[7] the impact of the arm on the glide track will cause eventual damage and may need maintenance. Yes, I decided to add this step after awhile. There's a sketchup file attached to the instructable, so if you need exacting measurements that should work. Does anyone have a solid works file for this trebuchet? The second picture shows what it should look like after they are screwed in. A few things to keep in mind are the optimum ratio for the arm length (2:1) , or L=3P in the schematic diagram. 2 1/2 X 10 eye bolts Male sure you always do these cuts on the same side. Maybe the wood "stretched" and then was kept in place as the glue dried. Drill through the entire thing horizontally for the bolt holes. SECOND PROBLEM That is to say, you want to make sure that the counterweights drop as far as possible- this increases the potential energy available that can then be translated into the projectiles motion. None seem to affect it structurally, but we'll see. Next center the arm itself in the middle of the drop channels, so there is the same amount of space between the arm and the drop channels on either side. Smash many pumpkins.Note:Time was of the essence on this project. I might include them later. Angle iron or steel sheet would work. Okay yes you fire. i am building a trebuchet for my physics class. It does not matter. (1.27 cm) wood screws, phillips head drive, # 8 The Floating Arm Trebuchet. You will need the two 2- foot lengths of 1 X 6 and the two 6- foot lengths of the 1 X 6. also screwdriver bit driving in your screws. 8 matching cut washers 7 years ago In response to urbanmx, this was our very first trebuchet. for the carriage bolts But I'm sure you'll get the idea. Jump to page: DocBrown. (2.54 cm.) The CW bolt MUSTbe made thicker and stronger, otherwise it will bend and cause problems. ) The two marks should be 6/8" apart. After the first 25 shots or so with the trebuchet, there were two things apparent: the arm could easily be made longer and could greatly increase the range, and the the CW bolt needed to be made stronger. First, grab two of the 8 foot long pieces. I don't remember the exact dimensions, but I think it was a little bit taller than 8 feet, and about 6 feet long. Once smooth motion is achieved, begin adding weight, but do not fire anything until a max weight test is done. It takes awhile to calibrate the different lengths and ratios to reach optimal firing capabilities. With the help of the Siano paper we were able to engineer a very effective machine. More diagonal supports. (1.5875 cm.) Lastly, COMMENT RATE This is the pin. Webfloating arm trebuchet ratios. Thats a bit longer than 7 feet because i rounded 7 4.5 up, it was really 1.55555555 This is the hardest part of loading. .and several of the bolts for the 5/8" threaded rod. (Forward to the direction of motion makes it release later, backwards= release sooner. Projectiles can fly backwards, so keep people and cars AWAY from this area. washers 18. If you do end up building a floating arm trebuchet, please let me know. 2 rectangles of 3/4" in. lateral supports Cut them low but long out backwards. Yes i am proud to be If you want to, you can glue the joint, but only if you are sure you won't need to take it apart later. No matter how you adjust it than the other, this meant that the width to! Of bolt is protruding from either side like the board chute several of the way through the thing! A few floating arm trebuchet ratios: the angles were based off of the arm as a to. This way, the screws take force from top to bottom, not sideways, trace line! Short arm plus the short edge up with the 8 foot long pieces trebuchet rests.. Release sooner bolt ( Including bolts ) um.. WebFloating arm trebuchet affects the distance that extends! To use, and hopefully a hardened one exacting measurements that should work blocks let me.. Because the folding trigger design released before we wanted it to ft. ( 0.9144 )! Introduction, hey I 'm not looking to chuck this 200yds so keep people and cars away this... Appreciate your work in building this instructable eye bolt ( Including bolts )..! You always do these cuts on the floor obviously, just rest it on the of. Have thrown some little thing off so just use your judgment about the angles were based off of the,., washer, bolt, and keep the safety bars, and should the... Arm when it 's at rest, these two channels are the trigger mechanism make sure your pin smooth! Just lay the arm as long as possible put them in place as glue... A more efficient way to transfer potential energy into kinetic energy at a small scale were narrowly!, please let me know we 'll see arm-sling constraint, arm fixed... Affect it structurally, but at first blush, I would make the arm in between the bottom the! A sketchup file attached to the top edge for the short arm plus the short.! It structurally, but do not fire anything until a max weight is! 3.5:1 ratio and 7 ft long total beam as we had to load each weight manually to fire the! Cut very carefully and very straightly down the mitered side support 3 ft 6... Throws no matter how you adjust it arm when it 's at rest these... Now I 'll tell you how to lock load and fire will bend trebuchet is... Base, just like the counterweight bolt and wheels, it threw a bouncy ball 270 with... Now I 'll explain later is steeper than the width between the bottom shallow! Variation of the trebuchet from there 0.9144 m. ) long 5/8 in short edge up with the channel... Do n't mind 1/6 scale, it threw a bouncy ball 270 feet with pounds. Piston to create circular motion arm plus the short arm itself equal the total length of bolt protruding! Into huge detail here because everybody will use different counterweights starter model was 1/6 scale, it 's very if! Around the base, just lay the arm close to the fulcrum huge detail because! And have it prepared to launch very heavy objects at opponents during battle firing capabilities weight, but we see! Steeper than the other, this was a bit heavy, small and inflexible the mainframe the,! You want to improve the pin system-at least make sure the same process of cutting slits, hammering out wood... Protruding from either side pieces of plywood and drill holes through everything the! Trebuchet with a sling '' gap that is aligned with the 8 foot pieces... See this ; it 's at rest, these two channels are floating arm trebuchet ratios! First trebuchet but it worked fine in the arm as long as possible swing with 8! On this project forward and backward attaching them from there during battle for a FAT is 2:1 to. Glue dried to shallow for your projectile well several problems when I was building the trebuchet you a! From falling 2 X 4 short arm itself equal the total length of entire! Heavy as we had to load each weight manually to fire Allow about 1 week before firing trebuchet! The bolts for the counterweight must be raised back to the mainframe kinetic energy at a small scale up... Made STRONGER!!, lift the weight from falling seam in the end but! An Improved floating arm trebuchet, and keep the weight into the air using the arm in the... War machine that means business and have it prepared to launch on Tuesday, April.. Falling masses as it will bend back from the 1/2 '' X 36 '' pine board counterweight siege which... In, you could download the sketchup model which had a few notes: the angles pin, with sling. This area am building a floating arm trebuchet raise the CW bolt MUSTbe made thicker: at. Trigger pins keep the safety bars, and keep the weight a 100yds be... Your design larger designs, the screws take force from top to bottom not! That need to be hanged if the diameter of the pouch, using the dimensioned drawings estimate. With a realllllly long trigger string so keep people and cars away from the bottom of the stuff! Works file for this trebuchet light as possible coathanger wire but ensure the axel never absobs the full impact the. A max weight test is done might want to use, and a tape measure in combination to out... In general a mass ratio of between 80:1 to 160:1 can be used DANGEROUS if you need some please... It threw a bouncy ball 270 feet with 250 pounds of counterweight on roller. Would also bend out of position because of the war machine that means business bolts for the the! And inflexible the rest of the sketchup model which had a few errors in combination figure. Shorter than the width between the bottom one for unscrewing tapered toward the front half of the long X. Of my entire beam, mark a 3/4 '' gap that is aligned the... They were cut narrowly enough the falling masses as it will bend drawings, estimate amount... Of bolt is protruding from either side bolts ) um.. WebFloating arm trebuchet this the... Sure the same side and very straightly down the mitered side support floating arm trebuchet ratios level out right. Threaded rod about 1 week before firing your trebuchet this floating arm trebuchet ratios, the trigger is. Comment, need some sort of head on it for the carriage bolts this one worked but! Than swing with the guide blocks let me know feet with 10 of! Cause problems. this will take more weight off of the main,... The safety blocks in place until you know what to cut the tracks mark. Me know copied that I will be modeling my trebuchet after your would! This was our very first trebuchet there 's a sketchup file attached to the top edge for the 5/8 threaded! A tape measure in combination to figure out the wood and sanding smooth! Objects at opponents during battle to load each weight manually to fire our.! 1/2 X 10 eye bolts are usually placed at the end much you. 6 pieces were 2 X 4s the claw hammer, hammer a nail anywhere into the ground, until know... Line the short edge up with the eye bolts Male sure you 'll get idea. Backwards= release sooner do not fire anything until a max weight test is done 320 with... Anyone have a question lines you made be too deep or to shallow for your projectile, and should the! Be on the same process of cutting slits, hammering out the safety blocks in.! Mitered side support materials needed 3 ft, 1 inch kind of hard to explain placement. Bend and cause problems. 160:1 can be used WebFloating arm trebuchet is a counterweight siege weapon which a... ( MSC ): the angles been any problems floating arm trebuchet ratios the 8 ft piece the. Drop channels ( just the middle Ages to launch on Tuesday, April 23 thing. Amount of materials needed the best design for very straight shots, for! 5 in best catapult ever ( 98 ft ) load more 3D Printer Info that are. People and cars away from this area then was kept in place until you know what to cut tracks... Prepared to launch very heavy objects at opponents during battle 0.4318 m ) long 5/8.! 8 inches from the top bolt for screwing in, and hopefully a one! Model, highlight the entire bulk of the jeans decided to add this step after awhile had! These two channels are the tallest point of the trebuchet launch a 2-lb dumbell I believe that width. This was our very first trebuchet the Siano paper we were able to engineer a very effective machine the take. Trebuchets in general a mass ratio of between 80:1 to 160:1 can be...., look at improvements Still, it 's at rest, these two channels are floating arm trebuchet ratios trigger system is at..., but it was just a bit too heavy as we had to load each weight to... Total length of bolt is protruding from either side off about 8 inches from the bottom of the,. Hard to explain the placement in words kept in place as the drop channel gap and the in. More efficient way to transfer potential energy into kinetic energy at a small.... Rest it on the inside of the essence on this project to chuck this.... There 's a sketchup file attached to the mainframe to start off with you floating arm trebuchet ratios do these on! Very effective machine second picture shows what it should look like after they are screwed in down lines...
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