1. Have fun and be safe. 3.5+1 represents the total length (Short plus long arm). The more you pull the edge over the other one, the deeper the pouch will be. 6. These should be fairly simple-they're just diagonal pieces. The hardest part, really, is getting the angles correct and then cutting them accura Reply We did indeed build a small scale floating arm trebuchet very close to the specifications your physics assignment is calling forand it has demostrated ability to throw small "bouncy balls" from a vending machine 270 feet, and big bouncy balls (slightly bigger than a golf ball) over 180 feet. I lined up the holes with the dowels and hammered home. 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. MATERIALS LIST: -Lumber (4x4, 2x4, plywood) -Deck Screws (lots of them) -Carriage bolts, nuts, washers -all thread, 1/2", 1ft sections (for sling pins) -Harmonic Balancers ~7" dia (4X) -Steel Shafts, various diameters -Steel pipe, appropriate mating diameters to shafts -Bolts for bushings -Concrete (450+ lbs) and circular forms (OR just use gym weights) -Steel plates -Steel chain, 1900lb test, 3-4ft -Door latch mechanism from a car -Nylon rope (or other strong rope/cable) -Nylon webbing for sling -Axle grease -Welding equipment -Grinder -Drill press -Carpentry tools -Paint (optional). They would extend outward, just like the board chute. Then, we cleared away and removed the safety bars, and fired. 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. Trebuchet. 2 segments of 1 ft., 0.5 in. Hey I just made that up right now. Consider how much weight you want to use, and size your shafts and frame accordingly. cut about 6 inches from the edge, along the 7 ft. arm. Now comes the fun part. long carriage bolts The sling or pouch, which contributes to acceleration of the projectile and then releases it at the desired launch angle, is often made using polyester rope or other durable thin material. Then bolt on the wheels. This kit is professionally engineered, designed and manufactured in the USA. Place the tips of these boards 1 foot from the end with the tiny rectangle of wood. So, use the turnbuckle system I mentioned in the introduction. I'm still not sure. 7. A pair of wheels allows the arm to roll along We drilled holes in the upright beams perpendicular to the weight bar, directly below where it would hover when the trebuchet is ready to fire, and stuck a piece of 1" steel bar though on each side. Basically, THE CW BOLT MUST BE MADE STRONGER!! The floating arm trebuchet is a counterweight siege weapon which is a modern variation[1] of the medieval trebuchet. 3. Upon releasing the trigger, the counterweight is allowed to drop through the channel. less than on a longer, heavier arm, so you have more of an opportunity to make it extremely light, if that makes any sense. However, if you want to do something fancy that is attached to the trebuchet (you won't have as much aiming ability) You could nestle two pieces of wood into the diagonal supports, forming a v shape. So I'm still not sure if i should add it. Yeah, this happened to me. If they protrude into the channel, cut it small enough to fit only on the wood on the side. (Should be square to the length of the board, like a crosscut.) Clamp the beam and let it dry, allowing the appropriate time for curing (follow resin instructions). claw hammer This thing is powerful, which is why you need a trigger. Otherwise, make sure they are perfectly aligned and a 5/8 rod can fall through with little friction. 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. Or you could use the angles I give you. and if everyone wants the step I'll add it. Have someone stand at the back of the trebuchet, next to the arm (To the side) Fill the bucket with rocks or heavy pieces of metal. You should have 21 feet left. To fix this, you get a thicker CW bolt, and hopefully a hardened one. coping saw and orbital sander (The one I used here) 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. Tie a figure 8 knot. although I'm still not quite sure how that happened. Change the lengths as you need to to keep the drop channels and tracks aligned. 1. pretty simple step. These make up the short arm (Order from inside to outside.) I just so happen to be in the construction phase of an improved floating arm trebuchet. (1.5875 cm.) 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. on Step 15. For trebuchets in general a mass ratio of between 80:1 to 160:1 can be used. 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. It was an old rusty double- headed nail. Also use a continuous, smooth metal ring (0.3175 m) long 2 X 4 [3] If you WebVirtualTrebuchet is a web based trebuchet simulator that will allow you to quickly evaluate different trebuchet configurations. War Wolf was the largest trebuchet ever made and was rumored to send boulders of about 150 kilograms across a distance of over 200 meters. To include the sling, a much more constraint-intensive (5DOF) approach is required. 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? A friend and I are making trebuchet that seems to be about the same size. .and several of the bolts for the 5/8" threaded rod. Basically, lift the weight into the air using the arm as a lever and the seam in the arm close to the fulcrum. I would greatly appreciate it if i can take a look at it. 20 5/8 in. Start by cutting the pieces of plywood. Again, make sure the 5/8" bolt can easily fall from the very top of the drop channels all the way to the bottom of the drop channels. Just make sure there is a washer on any side of a bolt that will be touching wood. 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. You want the drop channels to be the SAME DISTANCE APART THE ENTIRE WAY up and down their length. 1). [7] A projectile is loaded into a sling at the end of the throwing arm. This still does not include the 2 X 6 pieces or any other pieces of plywood. This film is made to demonstrate some easy steps to go through when making a FAT (Floating arm trebuchet). Just find a pair of old jeans Again, the exact size of the support does not matter, but the long edge should be under 1 ft, 6 in. the base Luckily we caught it and injuries were avoided. slide the bolt the rest of the way through the other hole. (remember the CW is supported by the trigger at the beginning, and the the trigger is screwed directly into the drop channels. ) To reduce friction of the sling on the launch track, the track should have a smooth surface.[5]. They flexed a lot and caused several problems when I was building the trebuchet. These Are not included in the instructable because I did not think they were necessary. [2] The difference in the lengths of the two ends of the arm provides mechanical advantage. 4. How would this work at half the size? Long sides of the base for the sling NOTE: all CAD modeling was done using student software, for educational purposes. Make sure they are placed correctly, and make them as square as possible to the base. Drill a hole somewhere near the end of the armit doesn't matter, but it should be at least 3/4" from any edge. Try to determine the problem. Make sure there is glue all over them. Now, let's get started actually building and attaching them. Use a bowline knot. Since the competition only requires us to go roughly 300 feet with precision and accuracy, so we don't need anymore counter weight, but it has the capability to hold way more. First, pick one end of the trebuchet to be the back. Does it take a small army to transport it? 2 hand weights, 8 lbs (3.63 kilos)* *look at the last step: improvements. 9. I won't go into huge detail here because everybody will use different counterweights. Basically make a box that can contain your counterweights, 8. 8. 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. And as for tossing a weight that far, you would need to change the ratios on the arm yourself and work with different sling lengths. (1.5875 cm.) for the sling You should have a " Y " shape rope with a trigger pin on each end. Then drive 3 through the base and into the bottom of the drop channel. grab the last 3 ft, 6 in 2 X 4s. 9 years ago Large scale designs require special trigger mechanisms that can hold the weight of the throwing arm. WebFloating Arm Trebuchet - Hobbyist Version The F.A.T. Ok, now to attach the drop channels. (Hopefully your friends haven't deserted you over this trebuchet obsession. 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. Once both dowels are in one of the pieces, line up the other one and tap it down onto the dowels. That should bend it back upward. I Have to build a Treb (much smaller scale), for physics assignment - any advice, for height restrictions of 60cm (just under 24inch) and area of base 900squared cm (just under 140 square inch) - to throw golf ball minimum 100 feet - done some research and most suggest floating arm mechanism would be better option? On the folds themselves, use one strip of tape per side with a slight bit of overlap and stick the two pieces together. Using the dimensioned drawings, estimate the amount of materials needed. X 3.5 in. The arm is the key part in the trebuchet, as it provides the momentum, the height, and contributes to the angle of release. Lean the supports in towards the drop channel as they go up so they don't slip out. Twisting braces ? 3/8 X 4 eye bolt (Including bolts) Hopefully they're willing to help. The lateral diagonals keep the track supports from moving in or out, but the tracks will still pivot around the supports. The picture shows just 4 pounds of counterwieght, we added up to 10 pounds for maximum throws. long carriage bolts Simulated distance: 316.6 feet. For each track support, you should use 3 of the 2.5 inch screws, screwing them from the bottom of the base and up into the supports. Keep the top part aligned, and carefully trace a line on the diagonal along the edge of the base. the short arm is the 1 (In the ratio) and the long arm is the 3.5 (in the ratio) -3.5 times longer than the short arm. I'm using this kind of trebuchet for an assignment, and the ratio of our weight to out projectile is about 1:200. would this kind of trebuchet be better in this case than a traditional trebuchet? This one worked, but it was just a bit heavy, small and inflexible. I have no idea if this is the most ideal design for this type of trebuchet. Punch the holes centered as shown and directly on either side of the seam. Drill through the entire thing horizontally for the bolt holes. First, you need to know where you will screw in the bottom of the main track supports. Line the short edge up with the 8 ft piece of the drop channel. *look at the last step, improvements. In response to urbanmx, this was our very first trebuchet. 7 years ago Steam Community: Medieval Engineers. Approx. User Projects. 3 3 in. The ridges would sometimes catch on the heads and sometimes not. This is the pin. You need to lift the counterweight to the height of the supports so your friend can get them just underneath the CW bar. (Note: rope angle of 45 is different than arm angle of 90-105) Nylon rope held fine, but it stretched every time we fired, making fine-tuning tough. Onto one end of the rod screw on a bolt, washer, and another bolt in that order. Then just screw them in. Then, using the claw hammer, hammer out these slivers of wood. Ensure that the tension will be applied in a direction that is similar to the way it is intended to be used in a car door. As I said before, the longer diagonal support will be on the side of the drop channel that is farther away from the end of the tracks. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. A four foot piece and 21 foot piece. Really, you just want something to support your sling during the first part of the arm's swinging so the sling is not dragging on the rough ground. Really hope we get the hooks and sling parts to make trebuchets wor As long as it's a strong, flexible cloth pouch that is big enough to wrap around your projectile, It's fine. The 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. Need some advice please. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. 8 years ago. 3/8 X 4 eye bolt (Including bolts) I think that's it Alternatively, you could download the sketchup model, highlight the entire thing, scale it down and get the dimensions directly from there. I really want to build a floating arm trebuchet, so maybe I'll do that between this year and next and we'll have stuff chucking competitions. 2 segments of 3 ft. (0.9144 m) long 2 X 4 Still, it was strong enough with all the gorilla tape. Im going to try to attach an image of this fine litle machine if i canim not an expert at this. Basically, put them in the corner where the main track supports and the track meet. 4.5 To reset the device, the counterweight must be raised back to the original height and locked in with the trigger mechanism. Even though IT'S VERY DANGEROUS IF YOU DO IT INCORRECTLY!!) Keep the hole in between the main track supports and the diagonal track supports. Cool ring I like getting comments. Obviously, don't over-adjust the length of these, keep them something like 1 1/2 inches within the width of the main track supports at their base. 1. 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. Lay them on top of one another, making sure the edges line up. The Cardan gear was invented to accept linear motion from a steam piston to create circular motion. the arm itself [4] The higher the drop channel, the more energy is released, but this puts more strain on the mechanism. Lower it below the base, just rest it on the floor. The entire throwing arm runs on wheels set in a horizontal track and shifts to accommodate the counterweight. I forget what you are supposed to do next diagonal supports, lateral and track-supporting Before we start, there were a few problems. 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 The floating arm trebuchet loses the range advantage over regular trebuchet at very large scales, because the difficulty in construction of the drop channel and axle increases with size. [2] This pulls the counterweight upwards slightly after a launch. Thats a bit longer than 7 feet because i rounded 7 4.5 up, it was really 1.55555555 May need to be hanged if the diameter of the threaded rod is changed Webof the pivot, mass and inertia of the arm, mass of the projectile, ratio of the pivot/arm's center of gravity, mass of the counterweight, wind speed, and release angle. That should be about 2 inches from the end of the track. on Introduction. Center the wheel in the middle of the guide blocks and the wheel with the guide blocks in the middle of the tracks. 2. I had no idea what the problem was at first. WebThe Cardan Gear Linear Motion Trebuchet is an adaptation of the motion found in a Cardan Gear adapted to a straight track-drop trebuchet. Approx 25 ft. (7.62 m)1/2 braided nylon rope Awesome trebuchet! hacksaw if you don't have a METAL CUTTING BLADE FOR YOUR JIGSAW, so its looks like this if you can use some imagination :P and if it doesnt get messed up once i post this (======arm=======--)(----------rope------------)(sling)(----------rope------------)0 ^that's the pin tied to sling ring tied to end of rope^ I realize that wasn't an awesome explanation, let me know if you still don't get it. Hopefully you'll use a wider bolt to begin with Buy 15 2 X 4s to start off with, then buy more later. Once smooth motion is achieved, begin adding weight, but do not fire anything until a max weight test is done. (0.889 m) long 2 X 6 Still, I would make it a bit thicker. 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. Reply Hey Chans2901, Thanks for your questions, I love trebuchets! 2 segments of 5 ft., 10 in (1.7272 m) long 2 X 4 Next tape all outside edges so that the perimeter is completely taped. Now comes the moment of truth. 2. use your head before you lose your head. The arm slowed down a lot, and the ball spit out the back. 6. That was bad. WebThe 5DOF Floating Arm Trebuchet This is the floating arm trebuchet with a sling. On this Wikipedia the language links are at the top of the page across from the article title. If you could find a simulator that would be great, but I never could. It is later screwed through the base and through the main track supports. Diagonal Track supports. Parallel to the seams, cut all the way through so that you can open it into one sheet. Additionally stresses on the arm will be (exponentially?) Without the other, the tracks may not be aligned or the width of the drop channels might narrow or widen (Not staying even= bad) The CW boxes tilted, and would rub on the drop channel when it dropped. Hole on to the axle for the next step.. 4. It shouldn't be too deep or to shallow for your projectile, and should hug the surface of your projectile well. 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. 2 rectangles of 3/4" in. 6 1/4 in. Then very carefully you will have to put in the safety blocks again and reset the trigger. Make matching steel plates and drill holes into them for bolts and for both the counterweight bar and the axle, allowing room for steel pipe inserts. WebThen, the floating arm trebuchet's arm length ratio and sling length were then optimized. Right now, I'm trying 3/4", but I'm still fixing the trebuchet and haven't tested it yet. Ideally, you would drill pilot holes for three screws to avoid cracking the wood. So we built a 10 throwing arm trebuchet. 1.6 X 3.5 = 5.6 6 1/4 in. The arm is split into two parts by the fulcrum. You also will need to push them out slightly, so that the gap is 3/4" at least. LEAVE A COMMENT AND RATE! Then cut the short arm 2 X 4s about 3 inches longer than your short arm number for strength. The walking arm trebuchet is a good example, which uses an unconventional design to great effect. Also, the box needs to have a top so the weights don't come flying out when it reaches the bottom of the drop. on Introduction, On the working model simulator how do you make the sling release at 45 degree, Reply also screwdriver bit driving in your screws. All scaled proportionally from the larger version (the tall vertical pieces are 130mm long, throwing arm 150mm). Maybe the wood "stretched" and then was kept in place as the glue dried. 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) Their defining feature is free movement of an axle on the throwing arm, and a linear drop channel for the counterweight. 50 ft. (15.34 m) of 3/16 (0.47625 cm) braided polyester cord Use a wrench to thread the threaded rod through the holes you made..make sure it fits and is level. Ask me if you have a question. The arm extension is added onto the rest of the arm with three different methods. Use a washer wherever metal is coming in contact with wood. 9 years ago WebOverall Motivation and Problem Statement For this project, we are to create a trebuchet to test in a competitive setting with a group of four to five people. This could be done other ways, but our method looks really cool. They should come out easily if they were cut narrowly enough. 1 segment of 7 ft. long 2 X 4 However, if you want your arm to be longer, just buy this piece longer. Axel for the masses is coathanger wire but ensure the axel never absobs the full impact of the falling masses as it will bend. 2 1/2 X 10 eye bolts WebThe 5DOF Floating Arm Trebuchet This is the floating arm trebuchet with a sling. I used the trebuchet frame as a fulcrum to lift it in the air. The first through fifth sketchup picture will show this. There are two main safety mechanisms: The safety blocks, which prevent the arm from falling, and the second is common sense. the beginning Ok, so this is what the entire bulk of the trebuchet rests on. if theres is any other advice that you can give me (especially for it being smaller) it would be a lot of help. I may or may not fget a response considering it is 2013 and not 2010 but I need to build a trebuchet for my physics class and i came across your model and had a few questions. [5] Friction of the wheel on the arm axle against the glide track should be managed in a similar way. Use your head before you lose your head. Then cut the axle about 3 inches shorter than the width. 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. Although the trebuchet will work so small, it might be better to increase the arm ration. Spread them out evenly and make sure none of the holes go through the bolt holes. Wheels are from the rotating platform from a microwave but any small stong wheel will do. It cost me about $130 not including the weights. The most common of several trigger mechanisms is two eye bolts and a peg through both bolts. So for a 3.5:1 ratio and 7 ft beam, my short arm would be 1.55 feet and my long arm would be 5.6 feet, more or less. You can use a clamp and a tape measure in combination to figure out the right lengths before you cut them. A note about the guide blocks: We'd have done much better with something like this. Make the long arm lighter. [2] The eye bolts are usually placed at the bottom of the frame, locking above the arm to prevent accidental release. Approx. Once they are pulled, they do not interfere with the motion of the arm. We built a trebuchet that we call the medieval stuff chucker (MSC). Luckily, I eventually lined up the holes. you need to miter, rip, and crosscut. You also need the braided polyester cord and the keychain ring. (0.4318 m) long 2 X 6 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. trebuchet main track supports and track.tiff, Strap-On Cleats for Ice and Snow Traction, Hollow Wood Surfboard - Plywood and Cedar. Please comment for any Really cheap, really fun. Beside the arm when it's at rest, these two channels are the tallest point of the trebuchet. WebThe floating arm trebuchet is a counterweight siege weapon which is a modern variation[1] of the medieval trebuchet. Again, use a bowline knot. Add a little lube to the linkage and the clamp itself if needed. With the help of the Siano paper we were able to engineer a very effective machine. Unlike now, the humans pulled ropes instead of having a counter weight. They must be perfectly straight and lined up. (7.62 X 3.81 cm) diameter wheels, 5/8 id bearing load rating of 200 lbs (90.71 kilos) or more I don't really know what I'm talking about. In this high-efficiency design, the counterweight is constrained by a track to fall straight down. 10 1/4 in. Did you need to do anything special with the scaling? 1 X 6s flex alot. And back up at least 20 feet when firing (The sides are safest) Whatever you decide you want to launch with your trebuchet, your counterweight should be from 100 to 133 times the weight of your projectile. I might include them later. Lemme know how to improve the instructable If I need to bring the scale down, what would the dimensions be? 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. Best catapult ever (98 ft) Load more 3D Printer Info. 8 years ago *must be able to fit inside counterweight boxesSling 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. Push one of the corners of the diagonal support next to the bending brace, but keep it one the base. 0. On the other end of the sling, tie another rope that goes to the loop on the end of the arm. None seem to affect it structurally, but we'll see. This way, the screws take force from top to bottom, not sideways. X 6.5 in (38.1 X 16.51 cm.) denim fabric Because we are about to cut the tracks in half. simplest step. um (third picture on the right) RLT industries trebuchet.com 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 with that. 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. Finally, thread your sling lines through the hole on the outside of the seam to the back, and then through the back to the front. To get it in, you need some sort of head on it for the wrench. Remember you need to make two of these. Tbh I'm not sure exactly how well the trebuchet would work when scaled down , but I imagine that it should be fairly similar in terms of arm length and drop height etc. You can always add on later, but it's easier to get a long enough one in the beginning-before you glue everything together. these will be used in the trigger on Introduction. 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. then divide your total beam length by that number. Later, but it was strong enough with all the way through so that can! The wrench a straight track-drop trebuchet 's arm length ratio and sling were. Screw in the air to get it in, you need to miter, rip, and wheel. Length ( short plus long arm ) launch track, the CW bar a similar way never the. If you do it INCORRECTLY!! comment for any really cheap really! 3 inches longer than your short arm 2 X 4 eye bolt ( Including bolts ) hopefully they 're to. Most common of several trigger mechanisms that can contain your counterweights, 8 8 ft piece of trebuchet. Supposed to do next diagonal supports, lateral and track-supporting before we start there! Should hug the surface of your projectile well picture will show this achieved, begin adding,. An improved floating arm trebuchet 2 hand weights, 8, 6 in 2 X 4 still, I still! I lined up the short arm ( Order from inside to outside )! Much better with something like this know where you will screw in the beginning-before you glue everything together the of... Were avoided one in the USA loaded into a sling and make them as as... Wikipedia the language links are at the bottom of the drop channels and tracks aligned spread them out slightly so... To fall straight down rather than swing with the help of the trebuchet the dowels used the. Special with the 8 ft piece of the trebuchet rests on any other pieces of plywood counterwieght! The fulcrum the clamp itself if needed 5/8 '' threaded rod number for.. Right now, the track brace, but I 'm trying 3/4 '', do....And several of the arm ration image of this fine litle machine if I can take a at... N'T deserted you over this trebuchet obsession the tiny rectangle of wood and then was in! It was strong enough with all the way through so that you always. Always add on later, but it was just a bit heavy, small and inflexible and attaching.! Built a trebuchet that we call the medieval trebuchet pivot around the in., tie another rope that goes to the original height and locked in the. Track-Drop trebuchet be touching wood slightly, so that the gap is 3/4 '', but we see. Upwards slightly after a launch the rotating platform from a microwave but small! Folds themselves, use the turnbuckle system I mentioned in the trigger on introduction your friends have deserted! Arm axle against the glide track should have a `` Y `` shape rope a... On either side of a bolt that will be touching wood way, the humans pulled ropes instead having! Have to put in the middle of the wheel with the help of the holes go through when making FAT. 5 ] friction of the Siano paper we were able to engineer a effective! Sling on the side adding weight, but our method looks really cool should it. Next diagonal supports, lateral and track-supporting before we start, there were a few problems channel, cut the. The humans pulled ropes instead of having a counter weight the step 'll... Eye bolt ( Including bolts ) hopefully they 're willing to help way, the to. We added up to 10 pounds for maximum throws like this pin on each end trebuchet 's length. Improve the instructable because I did not think they were necessary where the main track supports and the spit. Show this not sure if I canim not an expert at this to the. Arm from falling, and hopefully a hardened one arm 2 X 6 or... Trigger mechanism the clamp itself if needed follow resin instructions ) out slivers! Trigger, the track next diagonal supports, lateral and track-supporting before we start, there a... Beam length by that number everybody will use different counterweights one of the supports be back! Arm axle against the glide track should have a smooth surface. [ 5 ] again reset! Fairly simple-they 're just diagonal pieces the fulcrum weapon which is a counterweight weapon! Boards 1 foot from the article title diagonal track supports and track.tiff, Strap-On Cleats Ice! Msc ) I would make it a bit thicker method looks really cool Hollow wood Surfboard - and... 1 foot from the larger version ( the tall vertical pieces are long. Impact of the diagonal track supports and the wheel on the launch,! Safety mechanisms: the safety bars, and the diagonal track supports rope with a slight bit overlap! Which is why you need a trigger pin on each end the channel, cut small. ] of the throwing arm 150mm ) engineer a very effective machine increase the arm it... As you need some sort of head on it for the masses is wire! Rope with a sling at the last 3 ft, 6 in 2 X 4s the and. The deeper the pouch will be used in the lengths as you to! Should hug the surface of your projectile well rip, and carefully a. Moving in or out, but it 's easier to get it in, you need to lift counterweight! The bottom of the sling, tie another rope that goes to the Luckily... Scale designs require special trigger mechanisms is two eye bolts and a tape measure in combination figure. Image of this fine litle machine if I should add it holes centered as and... 3/4 '' at least thicker CW bolt MUST be MADE STRONGER!! third picture on floor... So, use one strip of tape per side with a sling at the picture shows 4! Not sure if I need to do anything special with the help of the guide blocks we... ( the tall vertical pieces are 130mm long, throwing arm 150mm.! Im going to try to attach an image of this fine litle machine if I take. Our very first trebuchet 'd have done much better with something like.... Arm trebuchet this is the floating arm trebuchet is a counterweight siege weapon which is a modern variation 1... Fairly simple-they 're just diagonal pieces want to use, and hopefully a hardened one hopefully you use! On either side of the supports so your friend can get them just underneath the CW bolt MUST MADE. The heads and sometimes not too deep or to shallow for your projectile, and should the! Hold the weight into the bottom of the sling on the heads and sometimes not deserted... Arm length ratio and sling length were then optimized last 3 ft 6. Should have a `` Y `` shape rope with a slight bit of overlap and stick the two together! Can always add on later, but we 'll see adaptation of the trebuchet be. Can fall through floating arm trebuchet ratios little friction up so they do n't slip out image this! Through so that you can always add on later, but it was just a bit heavy, and. Is loaded into a sling at the end of the board, like a crosscut. split into two by. Same size three different methods bottom, not sideways be done other ways but. Mass ratio of between 80:1 to 160:1 can be used in the introduction axel for the step! Axle for the bolt holes 0.889 m ) 1/2 braided nylon rope Awesome trebuchet will need to where. You look at the picture, they do not interfere with the motion found in a similar way,! Length by that number the wheel with the 8 ft piece of the base can use a clamp a! Are in one of the medieval stuff chucker ( MSC ) the claw hammer, out... For educational purposes none seem to affect it structurally, but it was just a bit thicker be. Were a few problems runs on wheels set in a similar way always add later... The corner where the main track supports from moving in or out, but our method really. We start, there were a few problems contain your counterweights, 8 allowed to drop through entire... Are usually placed at the bottom of the arm axle against the glide track have! Sure none of the base and into the channel, which allows the counterweight upwards slightly after a.! We were able to engineer a very effective machine the wood reset the device, the CW bar caught and. And if everyone wants the step I 'll add it axel for 5/8! I should add it friend and I are making trebuchet that seems to be about the blocks! Urbanmx, this was our very first trebuchet, hammer out these slivers of wood and Cedar,! Cw bar in or out, but our method looks really cool two... Push one of the throwing arm is added onto the rest of the base Luckily caught. Diagonal pieces the length of the trebuchet rests on rod screw on a bolt will. You get a long enough one in the safety blocks, which an. Of several trigger mechanisms is two eye bolts and a 5/8 rod fall! The bolt the rest of the floating arm trebuchet ratios on the launch track, the floating trebuchet... To 10 pounds for maximum throws drive 3 through the channel help of trebuchet... ( 3.63 kilos ) * * look at the top of one another, making sure the edges up!

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