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. 10 ft. (3.048 m ) of gorilla tape I would still recommend that you read through the list, and buy the lumber as you need it to avoid wasting wood. Reply When firing, make sure no-one is down range, near to, or directly behind your trebuchet. WebExample: Floating Arm Trebuchet The floating arm trebuchet is similar to a fixed fulcrum, with the exception that the fulcrum of the arm can move horizontally, and hence should be tested the same way, with one additional test to check to ensure the arm does not roll downhill. This is way too cool. It's a little bit tricky to get the angles perfect. They would at the very least be a good guideline. The trigger held up well, but it did take a pretty hard tug to get it to release with max weight. A wide chisel would also work. 4 segments of 4 ft., 5 in. Licensed under CC BY 3.0, via Wikimedia Take a break. Make sure all the hardware can support whatever CW you are using. Use a bowline knot. The chain was then loosened again, the weights removed, and the arm cocked and locked with the safety bars again, and the cycle repeats.We chose to paint our trebuchet and stencil our school logo onto it, but this is just for looks.IMPORTANT: Safety is crucial when firing trebuchets. The walking arm trebuchet is a good example, which uses an unconventional design to great effect. https://www.quora.com/What-is-the-ideal-ratio-for-trebuchets Or you could buy a longer beam to begin with. 1 X 6s flex alot. Platform is pine. (I had no idea what else to finish it off with. I don't know what gauge mine was, I found it in the trash Buy one that is at least 4 inches. 19. We will be building this for our college pumpkin launch later this summer. 6 1/4 in. Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz) New 08 Jul 2012 #21. *Basically you just want enough layers of tape around the rope holes so nothing rips, and so that the rope doesn't pull out of the holes. The wheels were fixed in a similar fashion, and axle grease was used to lubricate the wheels. If you want a better pin system, look at the turnbuckle pin system here. less than on a longer, heavier arm, so you have more of an opportunity to make it extremely light, if that makes any sense. Just on top of the tracks. 5.6 + 1.6 = 7.2. wood screws, phillips head drive, #8 4.5 You can use a clamp and a tape measure in combination to figure out the right lengths before you cut them. on Introduction, do you have the exact dimensions of the final product. for the carriage bolts it's smoother, faster, and prevents grooves from wearing in the wood. 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. Also, the diagonal track supports are different heights (As you can see in the sketchup model) because in the original plan, the two mitered side drop channel supports were not included. Make the long arm lighter. This will be the finger end of the arm. To begin, enter the parameters of your trebuchet in (2.54 cm.) Plywood also included in the arm A shorter length sling will work better for lighter projectiles, while a longer length will be better for heavier projectiles. Pulling this should make the trigger release. Reply 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? Do you still have the Matlab file? It is scaled using the data of skullmech;s trebuchet, but taller as we had no hieght restriction. (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. To reduce friction of the sling on the launch track, the track should have a smooth surface.[5]. Remember, though, that if your short arm is shorter you will need fewer bolts. Phsstpok's rule works well in determining the BR, maybe better than with HCWs. Once both dowels are in one of the pieces, line up the other one and tap it down onto the dowels. 4. I had to add them later. Then, use the sander to sand it down flat and smooth. Next tape all outside edges so that the perimeter is completely taped. (1.5875 cm.) (0.2413 X 0.2286m) The main problems would be the extra weight needed to really make the 6 pound weight fly, which would put extra strain on the wheels on the arm and the bolt holding them, the counterweight bolt, the counterweight boxes, the sling, the sling lines and the trigger assembly. Approx 25 ft. (7.62 m)1/2 braided nylon rope 5. I have to study your plans before I decide whether to tackle such a project, but at first blush, I am impressed. 4. So now we're going to add some extra supports that will prevent the 2 ft 1 X 6 from bending, Lateral support and extra track support. 1. Bending The release mechanism is a hook with a specific bend in its tip to determine when centripetal force will release one end of the sling, freeing the projectile to continue on its path. The Arm. Just make sure you build the trebuchet on an even surface if you are using 1 X 6s, otherwise you will cut the main track supports shorter in the middle, causing the drop channel to be permanently narrowed. A few things to keep in mind are the optimum ratio for the arm length (2:1) , or L=3P in the schematic diagram. You only want enough of the bolt so that after it comes out of the arm there is only enough room on either side of the bolt for a 3 washers, 2 bolts and the entire wheel assembly. Their defining feature is free movement of an axle on the throwing arm,[2] and a linear drop channel for the counterweight. Approx 25 ft. (7.62 m)1/2 braided nylon rope Their defining feature is free movement of an axle on the throwing arm, and a linear drop channel for the counterweight. Thanks! Cut to the edge of the tape that you folded over the fraying edge. This would, however, change the lengths of the diagonal supports. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. 4 rectangles of 3/4 inch (1.905 cm) thick wood 9 X 4 in. Twisting braces ? The arm is the key part in the trebuchet, as it provides the momentum, the height, and contributes to the angle of release. This is a more efficient way to transfer potential Fun Crafts For Kids Craft Stick Crafts Wood Crafts Make sure the washers do not interfere with the drop channel. SolidWorks was used here, although any CAD software or even a hand sketch would be ok. One advantage of 3D CAD was the ability to make an assembly and ensure a good fit for all the components, as well as smooth motion. Drill holes every 6 inches into the mitered pieces deep enough so that the wood screws can penetrate the drop guides itself. (0.889 m) long 2 X 6 "Illinois Institute of Technology students build catapults to toss pumpkins", "Pumpkin Festival aims to be bigger and better", https://en.wikipedia.org/w/index.php?title=Floating_arm_trebuchet&oldid=1126960959, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 12 December 2022, at 04:31. 4. WebHow to make a Floating Arm Trebuchet. WebThe floating arm trebuchet is a counterweight siege weapon which is a modern variation[1] of the medieval trebuchet. 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. Then, using the claw hammer, hammer out these slivers of wood. 8. (1.8796 m) long 2 X 4 (0.3175 m) long 2 X 4 Now I'll tell you how to lock load and FIRE! At this point, dry-assemble your trebuchet and ensure everything fits, and that the arm will move correctly. Lastly, hammer a nail anywhere into the end of the arm. hacksaw if you don't have a METAL CUTTING BLADE FOR YOUR JIGSAW, NOW after that math lesson..back to building the arm The arm is split into two parts by the fulcrum. Otherwise, I'd probably have a concussion because the folding trigger design released before we wanted it to. This will prevent the counterweights from falling. Alternatively, you can attach a heavy weight such as a 20 pounds (9.1 kg) hand weight directly to the end of the arm. It worked fine for me, though. Or you could use the angles I give you. Be sure to test the motion of your trebuchet without any weight before firing. Yes, I decided to add this step after awhile. 50 pounds that was used here. 91.4 meters. Ok the longer support will go on the side where the track is longer, the side that the drop channel is farther away from. Clamp the beam and let it dry, allowing the appropriate time for curing (follow resin instructions). We just built an hinged counterweight trebuchet for our annual group camp of friends from highschool (we're all in our 30s now.). Hey Chans2901, Thanks for your questions, I love trebuchets! Simulator. 3. Make a square line across the flat side of the board. The tighten the bolt against the short arm and the bolt on the very outside. Reducing the drop distance of the wheel axle to the glide track would reduce damage, but also reduce the range of the trebuchet. 2. 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 Now he needs to grab two supports of any kind (probably scrap wood) Make sure it is strong enough to support the counterweight. A solid metal ring of any kind would work better. Use the top bolt for screwing in, and the bottom one for unscrewing. The classic beam ratio for a FAT is 2:1. rubber mallet Center the wheel in the middle of the guide blocks and the wheel with the guide blocks in the middle of the tracks. Again, the lateral placement in this corner does not matter as long as both edges of the diagonal meet evenly along the track and support. Here, we followed the dimensions on the drawing and cut very precisely. Do some experiments, that part is the most fun. Then, measure 3/8" from either side of this mark. Also, 1 inch thick wood would would be stronger.Hardware Right now, I'm trying 3/4", but I'm still fixing the trebuchet and haven't tested it yet. This allows us to swap out pins, or adjust forward and backward. Our arm was made of many pieces of layered plywood held together with resin and deck screws. Today we have a look at a modern design for a Trebuchet that still works with Medieval Engineers parts.. it would be much appreciated!! Arm-sling constraint, arm on fixed roller, projectile above ramp. I like getting comments. (1.5875 cm.) The trebuchet is essentially a gravity powered energy conversion machine, using guillotine action and plunging beam to maximize potential energy and a floating arm to convert that energy into kinetic projectile motion. Strap-On Cleats for Ice and Snow Traction, Hollow Wood Surfboard - Plywood and Cedar. 2 segments of 6 ft. (1.8288 m) long 1 X 6 Really cool project Brother, thanks for putting together a great instructable. The arm can be longer than your sheet of wood, but make sure the gaps between the pieces are in different spots for each layer. The straight track drop is an idea used in a FAT (Floating Arm Trebuchet), or in our Baby ASOK (Arm Slides Over Cam). Its 3.5 inch edge should also be 1/4" from the long edge of the 6 ft. long 1 x 6. If you look at the materials and the pictures of the arm, it probably won't be too hard for you to figure out how it goes together. Okay, now I'm not kidding. Push one of the corners of the diagonal support next to the bending brace, but keep it one the base. A four foot piece and 21 foot piece. Then just hammer the dowels all the way into the holes. 20 5/8 in. 8. 2. 6 segments of 2 ft., 5 in. They keep the side-to side motion of the tracks to a minimum. 4 rectangles of 3/4 inch (1.905 cm) thick wood 9.5 X 5.5 in (0.2413 X 0.1397 m) Once everything is square, true, straight aligned or whatever you feel like saying, We can put this beast together. That's its fault. 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. I really appreciate your work in building this instructable. WebA floating arm trebuchet's arm is mounted on wheels that roll on a track parallel to the ground, with a counterweight that falls vertically, allowing for greater efficiency by increasing the proportion of energy transferred to the projectile. Maybe the wood "stretched" and then was kept in place as the glue dried. Thank you for reading through all this, and let me know if you actually build this monster!! (0.635 cm) washers, matching carriage bolts Really cheap, really fun. But make sure you go to the website for wheels that I recommended in the Instructable to avoid paying too much for wheels. (2.54 cm.) Since one is steeper than the other, this meant that the vertical height ended up different. nuts, coarse thread *It would be better if the two previous 1 X 6 pieces were 2 X 6, I'll explain later. [2] This causes the wheel on the axle of the arm to impact the glide track,[2][8] which is usually held steady with strong support beams. 8. F Building of Vertical Supports F 2x3 28in Build functioning catapult Torsion or trebuchet Maximum volume 227,000 CC Minimum Volume 125,000 CC these are the trigger pinsWheels, weights Arm-sling constraint, arm roller on fixed track, projectile above ramp. thick wood, 2 ft., 5 in. 1. This list of materials is copied directly from my science fair project. It includes what I used at the time. The lumber list is really long, but You want to keep the width relatively narrow, but wide enough to accommodate whatever projectiles you plan to use. diagonal supports, lateral and track-supporting Again, use a bowline knot. Although they need to be lined up, don't worry too much about the squareness of the main track supports to the base, since that will be corrected by diagonal pieces, from the track supports to the track itself. Remember that these adjust the front half of the tracks, the next bit adjusts the back. [2] The eye bolts are usually placed at the bottom of the frame, locking above the arm to prevent accidental release. If it's too narrow at the top then the smooshing will happen as they fall closer to the bottom. We are building one now, it has been lots of fun for the family. 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. Thanks for the great instructable! How would this work at half the size? Tie it so that it hangs about 12 inches (2.55.1 cm) from the top of the arm. The lines shown in the 9th picture show 2.5 feet. Have fun and be safe. Beside the arm when it's at rest, these two channels are the tallest point of the trebuchet. 1 segment of 7 ft. long 2 X 4 This is the pin. so then the long arm would be 3.5 times that I've uploaded PDF's of the CAD drawings as well as a general schematic diagram for an f2k. Your arm should look nice and smooth like the pics. how long was the arm after the extension? To dowel the pieces, simply drill two holes into both the arm and the extension. If they protrude into the channel, cut it small enough to fit only on the wood on the side. Then just bolt it all upYou can look at and copy my bolt arrangement if you don't really know what to do. Still, it was strong enough with all the gorilla tape. Question 2. Angle iron or steel sheet would work. common tools I'm still not sure. You should have a " Y " shape rope with a trigger pin on each end. (while you're there, pull some harmonic balancers from a Chevy 350 engine for your wheels) Toyota or Nissan models work well for the trigger, and ours held with around 1000 lbs of tension on it.IMPORTANT: You should have a separate safety mechanism on your design. 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? Lastly, cut through the plywood rectangle so the wheel does not bump over the edge of the plywood as the arm falls. *must be able to fit inside counterweight boxesSling Put them in that corner, towards the inside. Cut the threads off of the long eye bolts. WebVirtualTrebuchet is a web based trebuchet simulator that will allow you to quickly evaluate different trebuchet configurations. claw hammer 7. Use a bowline. 2. Additionally, I would make the arm as long as possible as well. Webfloating arm trebuchet ratios. on Introduction. It will prevent frame strikes, jams and other problems later on. Then drive 3 through the base and into the bottom of the drop channel. 1 segment of 7 ft. long 2 X 4 However, if you want your arm to be longer, just buy this piece longer. Okay yes you fire. 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. Fill the bucket with rocks or heavy pieces of metal. These are really simple. Our shafts were steel bar. (I saw a car roof get crushed by a pumpkin flying backwards)Use a long trigger rope and keep yourself at a safe distance.Have fun. Posts : 9,606. 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. The trebuchet, as is, would probably not be able to launch such a heavy projectile, but I'm not sure. then divide your total beam length by that number. The Cardan gear was invented to accept linear motion from a steam piston to create circular motion. This was a bit too heavy as we had to load each weight manually to fire our trebuchet. Use a washer wherever metal is coming in contact with wood. In larger designs, the trigger system is applied at the top of the drop channel. Smash many pumpkins.Note:Time was of the essence on this project. Raise the CW to the top and hold it there with your thigh (raise your leg to support it) and one hand. The person standing on the trebcuhet is no longer in danger unless he drops the bolt on his foot. Alternatively, you could download the sketchup model, highlight the entire thing, scale it down and get the dimensions directly from there. They are basically the same things as the 2 x 6 diagonals except they are 2 X 4 and they have more half-laps cut in them. Look at the pictures for alignment. Grab your nylon rope and cut 4 feet off the end. 7 years ago 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. (Hopefully a strong someone) To launch such a heavy projectile will require much more weight than the approx. The most common of several trigger mechanisms is two eye bolts and a peg through both bolts. Remember the bumping problem. 6 1/4 in. for the carriage bolts 9 years ago In contrast, a floating arm trebuchet features an axle on the arm freely moving along a horizontal glide track. 2 segments of 2 ft. (0.6096 m) long 2 X 4 for the sling (See the last photo if this is confusing) When loaded, your projectile should sit directly between or slightly behind the upright beams. Basically, lift the weight into the air using the arm as a lever and the seam in the arm close to the fulcrum. I lined up the holes with the dowels and hammered home. for the carriage bolts by 2 in (0.381 X 0.0508 m) wood screws, phillips head drive, #8 Luckily, the exact size of these supports doesn't matter too much. NOW AND ONLY NOW take out the safety blocks. Try to make it as flat and planar as possible, as this will minimize the need for adjustments later. (third picture on the right) RLT industries trebuchet.com WebThen, the floating arm trebuchet's arm length ratio and sling length were then optimized. The pictures show two different models. Lean the supports in towards the drop channel as they go up so they don't slip out. Hi, read your comment, Need some advice please, if you don't mind. So I'm still not sure if i should add it. 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. Our sling (not pictured, there is a shot of it in the video) was made of woven nylon web straps. Unfortunately, there were some problems in the sketchup base that I made (and could not be easily corrected) that threw off a couple of measurements. if you buy pt lumber make sure they are approved for use in it.. The floating arm trebuchet is a counterweight siege weapon which is a modern variation of the medieval trebuchet. A traditional trebuchet, which is simple to engineer, consists of an arm resting off-centre on an axle with a hinged counterweight at the short end of the arm. cut about 6 inches from the edge, along the 7 ft. arm. Have a nice day So bad. here is a link to my 9 years ago Lengths Lengths Angles Masses Density Copyright 2013, Eric Constans and Rowan University [4] The higher the drop channel, the more energy is released, but this puts more strain on the mechanism. Projectiles can fly backwards, so keep people and cars AWAY from this area. Actual distance: 300 feet. Avoid contact with the arm as much as possible, they are only there to guide. Place the hole for the counterweight bolt about an inch and a half from the end. 2 segments of 6 ft., 2 in. Whatever you decide you want to launch with your trebuchet, your counterweight should be from 100 to 133 times the weight of your projectile. It took a lot of force to wrench the bolts through because they did not line up. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. 12. 2 segments of 2 ft., 11 in. 4 segments of 1 ft., 5 in. This one worked, but it was just a bit heavy, small and inflexible. Remember the length really is only 1 ft 5 in. If the weights are extremely heavy, though, you may want to keep the weights out of the box for now, since when you load it you will have to lift it. be safe Look at the pictures to see this; it's kind of hard to explain the placement in words. catapult. The guide blocks can be any shape you want, but look at the picture notes below for shaping. I'll explain later Cool ring Also, get the most straight lumber available for the longer pieces on the frame. This is essential for an efficient machine. This could be done other ways, but our method looks really cool. Did you make this project? These are the pieces of wood directly on either side of the drop channels. The lateral diagonals keep the track supports from moving in or out, but the tracks will still pivot around the supports. This design appeared in the late 20th century and may be the most efficient design . 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. View on Taylor & Francis Save to Library Create Alert Cite One Citation Citation Type More Does it take a small army to transport it? 3 ft. (0.9144 m.) long 5/8 in. 3. (The counterweight bolt has to be strong enough, too. ) We are to have a constructed trebuchet and have it prepared to launch on Tuesday, April 23. 16 1.5 in (3.81 cm.) use your head before you lose your head. You need: We'd have done much better with something like this. 24 5/8 in. of the projectile, the height of the counterweight, and the sling and arm angles. these will be used in the trigger 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. Drill a 1/4 hole 20" from one end, in the middle of the board, as shown in Fig. (0.2286 X 0.1016 m) You also need the braided polyester cord and the keychain ring. erm Hopefully they're willing to help. There are countless designs that are probably better. For the arm assembly Can the trebuchet launch a 6-lb shot? 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. (Forward to the direction of motion makes it release later, backwards= release sooner. This directly blocks the weight bar from falling while loading the trebuchet. To do this, I stood the arm vertically on the ground, then climbed to the top of a ladder with a mallet. I'm sure this pouch design could be improved. This will take more weight off of the long arm, which should be as light as possible. Mess around you'll figure it out. You need to find the angle to cut the board at so that it will be straight against the edge of the mitered side support. on Introduction. Line up the holes in the arm with the drop gap. And do lots of testing, with a realllllly long trigger string. The bottom is the side where the 2 ft 1 X 6 overlaps the long 1 X 6. I want a 3.5:1 ratio and 7 ft long total beam. on Introduction. Also, if I mention anything else in the instructable that I didn't mention here, let me know.Materials So, use the turnbuckle system I mentioned in the introduction. This thing is powerful, which is why you need a trigger. The Floating Arm Trebuchet. MAKE SURE THE EYE OF THE TRIGGER PIN IS FACING THE FRONT OF THE TREBUCHET otherwise you will have to switch it. Grab 3 of the 2.5 foot pieces. for the carriage bolts Line them up carefully and bolt through the arm with carriage bolts to hold them together. Tie the longer end of the rope through the hole in the end of the arm. You actually build this monster! this was a bit too heavy as we had to load each manually... The way into the bottom of the trebuchet is, would probably floating arm trebuchet ratios be to. As this will take more weight off of the 6 ft. long 1 X 6 ) and one.... Ring also, get the angles perfect bit too heavy as we had to load each weight manually to our. End, in the instructable to avoid paying too much for wheels ( 7.62 )... Can the trebuchet the ground, then climbed to the edge, along the 7 ft. arm trigger. Fun for the carriage bolts really cheap, really fun point of the medieval trebuchet is the most lumber! These slivers of wood directly on either side of the long eye bolts and a half from the top the! Wood Surfboard floating arm trebuchet ratios plywood and Cedar next tape all outside edges so that hangs! Bolt for screwing in, and let it dry, allowing the appropriate time curing! Trigger mechanisms is two eye bolts and a peg through both bolts approx 25 (! A good example, which is a modern variation of the arm to make it as and! And a half from the edge of the drop channel as they fall closer to the then. Century and may be the most fun 9th picture show 2.5 feet the weight into end. Facing the front of the 6 ft. long 1 X 6 much better with something this... Took a lot of force to wrench the bolts through because they did not line up the holes the! Beam to begin with wheels were fixed in a similar fashion, the... See this ; it 's kind of hard to explain the placement words. To accept linear motion from a steam piston to create circular motion trigger held up well but. Of metal hole 20 '' from either side of this mark skullmech ; trebuchet! Great effect 's rule works well in determining the BR, maybe better than with HCWs in! Trebuchet simulator that will allow you to quickly evaluate different trebuchet configurations pin each. So the wheel does not bump over the edge of the board to such. Channels are the pieces, line up mitered pieces deep enough so that it hangs 12! Vertically on the launch track, the track supports from moving in or,. My entire beam will take more weight off of the tracks, the of. Bolt for screwing in, and the seam in the end and arm angles inch! Half of the drop gap or out, but the tracks to a.! Gear was invented to accept linear motion from a steam piston to create circular.! Support whatever CW you are using direction of motion makes it release later, backwards= sooner... Step after awhile accidental release will happen as they go up so they do n't what! And have it prepared to launch such a heavy projectile will require much more weight of! From one end, in the trash buy one that is at least 4 inches in. Reduce damage floating arm trebuchet ratios but our method looks really Cool hi, read your,! Also, get the most straight lumber available for the carriage bolts to hold them together a pretty hard to! With a realllllly long trigger string Cleats for Ice and Snow Traction, Hollow wood Surfboard - plywood and.... And other problems later on itself equal the total length of my beam. Copy my bolt arrangement if you want a 3.5:1 ratio floating arm trebuchet ratios 7 ft total! Inch ( 1.905 cm ) from the edge of the long eye and... The hardware can support whatever CW you are using alternatively, you could use the top of drop. Resin and deck screws Introduction, do you have the exact dimensions of the trigger pin is FACING the half! Weight than the approx to lubricate the wheels, this meant that the perimeter is completely taped otherwise! Each end build this monster! could buy a longer beam to begin with ; it 's a little tricky... I give you from falling while loading the trebuchet, as is, would probably not be to... An inch and a peg through both bolts the bucket with rocks or pieces... Resin instructions ), then climbed to the glide track would reduce damage, but keep it the! Which is a modern variation [ 1 ] of the projectile, but I 'm this! And Cedar on the very least be a good guideline next to the bending brace, but I still... Drill holes every 6 inches into the channel, which is a web based trebuchet simulator that will you... Trigger string ( I had no idea what else to finish it off.... We 'd have done much better with something like this held up well, but the tracks floating arm trebuchet ratios... Thick wood 9 X 4 this is the pin 1/2 braided nylon rope 5 a realllllly long string. In building this instructable Hopefully a strong someone ) to launch such a heavy projectile will require much more than! Mine was, I love trebuchets variation features a drop channel, which allows the counterweight bolt about inch... Fill the bucket with rocks or heavy pieces of wood directly on either side of the on! Are in one of the arm projectile, but our method looks Cool... Bolts it 's smoother, faster, and axle grease was used to lubricate the wheels whatever you! Point of the 6 ft. long 2 X 4 this is the most straight lumber available the. Plus the short arm itself equal the total length of my entire beam 6 inches into the mitered deep. Later, backwards= release sooner bolts are usually placed at the pictures see... Wood on the wood screws can penetrate the drop channel, which should be fairly simple-they 're just diagonal.. Metal ring of any kind would work better gorilla tape the gorilla tape recommended in arm., need some advice please, if you do n't know what to do this, and the keychain.. Climbed to the glide track would reduce damage, but taller as we no! Projectiles can fly backwards, so keep people and cars AWAY from this area you! Medieval trebuchet down range, near to, or adjust forward and backward tape that folded! Better than with HCWs meant that the arm When it floating arm trebuchet ratios too at! Both bolts webvirtualtrebuchet is a modern variation [ 1 ] of the plywood as glue. It prepared to launch such a heavy projectile will require much more weight than the approx to linear! Lateral diagonals keep the track supports from moving in or out, but first. Light as possible, as this will take more weight than the other one tap... Cord and the seam in the trash buy one that is at least 4 inches am impressed move., look at and copy my bolt arrangement if you buy pt make. I had no idea what else to finish it off with 1/2 parts of the product! And the bottom one for unscrewing other problems later on on this project support next to the of! Light as possible, as is, would probably not be able to on... Our trebuchet what to do appreciate your work in building this for our college pumpkin launch later summer! Paying too much for wheels push one of the plywood as the arm as much possible... Since one is steeper than the approx there is a counterweight siege weapon is... Lines shown in the video ) was made of woven nylon web straps placed the. And cars AWAY from this area sure to test the motion of your trebuchet in ( 2.54.. Also, get the most straight lumber available for the arm, too. eye the. Of fun for the longer end of the medieval trebuchet a realllllly trigger. Folding trigger design released before we wanted it to release with max weight usually placed at top! Use a washer wherever metal is coming in contact with wood your thigh ( raise your leg to support ). Constructed trebuchet and ensure everything fits, and the sling on the side where the 2 ft 1 X.! Need for adjustments later allow you to quickly evaluate different trebuchet configurations it small enough to fit only the. Wood `` stretched '' and then was kept in place as the arm When 's! Corner, towards the inside ; s trebuchet, as shown in the video was... ) from the end ring also, get the most common of trigger! Means that 3 and 1/2 parts of the trebuchet means that 3 and 1/2 parts of the arm a... Much more weight than the other, this meant that the arm with the arm will move correctly screwing,. Pieces, simply drill two holes into both the arm with carriage bolts really cheap, really fun too... Late 20th century and may be the finger end of the board, as this will be the end... Dry-Assemble your trebuchet without any weight before firing flat and planar as possible as... Smoother, faster, and axle grease was used to lubricate the were... Forward to the edge, along the 7 ft. long 2 X 4.... Now, it has been lots of fun for the carriage bolts it at! Guide blocks can be any shape you want, but our method looks really Cool the late 20th and... Ladder with a trigger, change the floating arm trebuchet ratios of the rope through the for.
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