on Introduction, On the working model simulator how do you make the sling release at 45 degree, Reply Basically make a box that can contain your counterweights, whatever they are. (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. The two bits at the open top of the cut channel..keeps the drop channel from "opening" I have to study your plans before I decide whether to tackle such a project, but at first blush, I am impressed. Does it take a small army to transport it? To dowel the pieces, simply drill two holes into both the arm and the extension. Ok, looking at the main pictures, there are two more big things that need to be added to the mainframe. 7 years ago For the weight I used ( 36 pounds) a 5/8" HARDENED STEEL rod MIGHT work. (0.2413 X 0.2286m) They must be perfectly straight and lined up. 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. Experiment the way I did with different long/shirt arm ratios, keeping in mind that a bigger ratio will require lower tracks and a heavier counterweight. Cut to the edge of the tape that you folded over the fraying edge. The weight bar was 1.5" diameter, AISI 4140 cold drawn (probably overkill) and the axles were 1.2" diameter, AISI 1020 CD. Spread them out evenly and make sure none of the holes go through the bolt holes. Next, grab you trigger pin and just hold it beneath the CW bolt. Im going to try to attach an image of this fine litle machine if i canim not an expert at this. Clamp the beam and let it dry, allowing the appropriate time for curing (follow resin instructions). Then, measure 3/8" from either side of this mark. 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. As long as it's a strong, flexible cloth pouch that is big enough to wrap around your projectile, It's fine. 91.4 meters. I would still recommend doing one, though. If not, just measure the distances on each piece as accurately as you can. Circuits | Floating Arm Trebuchet : 7 Steps (with Pictures) - Instructables It includes what I used at the time. I like the adjustable arm ratio. Ok, now you need to flip over the long (6-ft.) pieces and slide the two foot pieces underneath. In this high-efficiency design, the counterweight is constrained by a track to fall straight down. This tape will further reinforce the areas where the string will go through. These should be fairly simple-they're just diagonal pieces. (Order from inside to outside.) To reset the device, the counterweight must be raised back to the original height and locked in with the trigger mechanism. 4 segments of 1 ft., 5 in. 1 segment of 7 ft. long 2 X 4 However, if you want your arm to be longer, just buy this piece longer. drill (The one I used here came in a kit here) with a varied drill bit set, for pilot holes, etc. NOW AND ONLY NOW take out the safety blocks. It's a little bit tricky to get the angles perfect. So bad. It cost me about $130 not including the weights. We are building one now, it has been lots of fun for the family. The person holding the arm up can relax. then, to check we add the short arm and long arm length together: Hi, read your comment, Need some advice please, if you don't mind. I have no idea if this is the most ideal design for this type of trebuchet. It would also bend out of position because of the force of the swinging projectile. 4. Essentially, beef up the arm assembly. Also, 1 inch thick wood would would be stronger.Hardware We will be building this for our college pumpkin launch later this summer. these are the trigger pinsWheels, weights 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. It may take you a few tries, so cut carefully an take small amounts of wood off, checking the angle after each cut so you don't overcut it. 3 ft. (0.9144 m.) long 5/8 in. Remember, smooth transitions. 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. 8 segments of 3 ft., 6 in (1.0668 m) long 2 X 4 so i need to cut length of everything down to size. The first through fifth sketchup picture will show this. Trebuchet. Place the tips of these boards 1 foot from the end with the tiny rectangle of wood. The tighten the bolt against the short arm and the bolt on the very outside. We actually did not have motion software, we just looked at lots of YouTube videos. 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. Also use a continuous, smooth metal ring The angles shown in the pictures are based off of the sketchup model, but they seem to be correct. A small-scale replica of War Wolf, a counterweight trebuchet that uses a boulder-holding sling at the end of a swinging arm. DRILL PILOT HOLES FOR EVERYTHING!!!!!! Unless one eye bolt cannot support the weight, relax. Look at the pictures for alignment. That was bad. the floating arm trebuchet where did it originate? 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 (Should be square to the length of the board, like a crosscut.) Then just bolt it all upYou can look at and copy my bolt arrangement if you don't really know what to do. At the current position they dont utilize all of the work you did lifting your weights.Here is a floating arm that two other students and I from FRC team 11 MORT designed for punkin chunkin in Delaware. (1.8796 m) long 2 X 4 Make sure there is glue all over them. For a traditional trebuchet, the optimum weight ratio is 133:1. For trebuchets in general a mass ratio of between 80:1 to 160:1 can be used. Attach a 20ft + length of rope to the release mechanism on the door latch. Be sure to test the motion of your trebuchet without any weight before firing. Today they are used mostly for recreation and education. 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. They have the same orientation as the main track supports. This would eliminate cracking and make the drop channel much stronger. 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. [5], A floating arm trebuchet has three points of contact where friction can interfere with efficiency. It's 12 feet tall with a 10 foot arm. 2 segments of 3 ft. (0.9144 m) long 2 X 4 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. The angle and length of the pin control when the sling opens. 1. pretty simple step. 6 1/4 in. 10 1/4 in. This one is pretty bad. on Step 15, This is stellar. Try to determine the problem. Axel for the masses is coathanger wire but ensure the axel never absobs the full impact of the falling masses as it will bend. If they protrude into the channel, cut it small enough to fit only on the wood on the side. 2 segments of 6 ft., 2 in. The aluminum support pieces are not necessary if the trebuchet is short enough or the CW is very light- if you can raise the cw to the top in one shot, g4u. 2. Now, measure that same distance on the base. Flexing will be reduced and you will have a stronger base to work with. Does anyone have a solid works file for this trebuchet? 16 1.5 in (3.81 cm.) Otherwise, the arm would derail a lot more. You will later put more screws into the half-lap area, so the joint is not only held together by these screws. Please help because this project is due the 20th. The floating arm trebuchet uses a counterweight held on top of a tall drop channel to transfer potential energy into kinetic energy. 6 1/4 in. -The box needs to be made narrow enough to fit on the outside of the drop channel and still have room to be loose..that's room for other bolts and washers. Then just screw the bolt through when you need to. Grab the trigger pins. The arm is done. Ok, now repeat the entire process mentioned above for the "short" side. There's a sketchup file attached to the instructable, so if you need exacting measurements that should work. Ok, find a flat surface and 3 scrap pieces of 2 X 4. I might include them later. Simulated distance: 316.6 feet. Unlike now, the humans pulled ropes instead of having a counter weight. Otherwise, The arm will get puched over and on top of them, slowing down the arm a lot. on Introduction. Trebuchets work by using a counterweight system turning the falling energy of the back end into a high speed launch of a heavy S Kei Sco Table Saw Sled Marble Machine Plan Drawing All The Way Down Viera Stick It Out Things That Bounce Element It wasn't the best design for very straight shots, but for me it worked very well. They should be about 2.5 feet tall. WebAn important part of whipper performance is the beam ratio, the ratio of long arm to short arm. these will be used in the trigger This book is a compilation of step-by-step instructions for how to build nine different types of catapults and trebuchets, including plans for: A PVC Pipe Trebuchet, A Tabletop Trebuchet, The World Famous Floating Arm Trebuchet, The Historical WarWolf Trebuchet, A Rat-Trap Catapult, The Mangonel (or Onager), The Greek Ballista, a Actual distance: 300 feet. Before we start, there were a few problems. Luckily, It's also pretty simple to make. The axle bolt hole would be drilled in the short arm 1.5 feet from the end. Make them small as possible, but make sure they can still guide the arm until its wheels hit the track. This will be the top. [2] This pulls the counterweight upwards slightly after a launch. However, a floating arm trebuchet is more efficient when built to a size of between one meter and five meters,[5] making it suitable for hobbyists and model builders. (I had no idea what else to finish it off with. If you do end up building a floating arm trebuchet, please let me know. We are to have a constructed trebuchet and have it prepared to launch on Tuesday, April 23. To include the sling, a much more constraint-intensive (5DOF) approach is required. These can be found cheap at any junkyard. WebA trebuchet is a device used in the Middle Ages to launch very heavy objects at opponents during battle. Again, cutting these pieces shorter will narrow the track and cutting them longer will widen it. excellent site for cheap, strong wheels http://www.thecasterguy.com/ 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. Their defining feature is free movement of an axle on the throwing arm,[2] and a linear drop channel for the counterweight. 4 rectangles of 3/4 inch (1.905 cm) thick wood 9.5 X 9 in. This film is made to demonstrate some easy steps to go through when making a FAT (Floating arm trebuchet). I'm nearly done with the trebuchet but I'm having trouble understanding the sling. Then cut the short arm 2 X 4s about 3 inches longer than your short arm number for strength. (2.54 cm.) The box should have a bottom that is "outside" the walls, screwed in from this bottom and into the walls, not through the walls and into the bottom. The Floating Arm Trebuchet. 1. 6 segments of 2 ft., 5 in. First, you need to know where you will screw in the bottom of the main track supports. Punch the holes centered as shown and directly on either side of the seam. For the arm assembly Before you drop the weight and start all over again, with your other hand, slip the trigger pin through one of the eye bolts, under the CW bolt and through the other eye. 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. On the arm, drill a hole for an eye bolt, and use a washer on both ends. Just on top of the tracks. trebuchet main track supports and track.tiff, Strap-On Cleats for Ice and Snow Traction, Hollow Wood Surfboard - Plywood and Cedar. Fill the bucket with rocks or heavy pieces of metal. Short arm, washer, bolt, washer, wheels and bearings, washer, bolt. Thinking *this is not funny only annoying* Its 3.5 inch edge should also be 1/4" from the long edge of the 6 ft. long 1 x 6. For them to fit, I had to cut different lengths off of the diagonal supports. 7. The oddity with this trebuchet is that it has no arm ratio as the counterweight sits at the very end of the arm, and the arm itself tends to be shorter. -Make sure it is strong enough to take the force of your falling counterweight. I'm pretty sure I made my dowels 1/2" wide and 8 inches long. This will stop fraying and make it more solid. Also, get the most straight lumber available for the longer pieces on the frame. Ok lets get started. Although later there are more. of the projectile, the height of the counterweight, and the sling and arm angles. View on Taylor & Francis Save to Library Create Alert Cite One Citation Citation Type More 8 matching cut washers If the shot releases at the wrong time, adjust the pin angle. 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. I don't know what gauge mine was, I found it in the trash Buy one that is at least 4 inches. The Then, drive in the screws. denim fabric The guide blocks can be any shape you want, but look at the picture notes below for shaping. 2 segments of 1 ft., 0.5 in. This new and improved 21st century version of the trebuchet uses a modern understanding of physics and engineering principles for incredible power and range! 3/8 X 4 eye bolt (Including bolts) 21. [5], The dropping of the counterweight forces the arm to swing to one side of the glide track and quickly jerk in the opposite direction to launch a projectile. Sorry I haven't responded until now. 8. for the carriage bolts 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. The lines shown in the 9th picture show 2.5 feet. 3.5+1 represents the total length (Short plus long arm). To do this, I stood the arm vertically on the ground, then climbed to the top of a ladder with a mallet. User Projects. 11. Thank you for your generous gift to the DIY community. Steam Community: Medieval Engineers. It would be better if both ends were one solid piece of wood. Then fold in on top of the other one to crinkle the pouch into a more pouchy shape. If you want to, you can glue the joint, but only if you are sure you won't need to take it apart later. WebThere are no really detailed descriptions of medieval or earlier trebuchets that give, for example, the dimensions or shape of the beam, the ratio of its long arm to its short arm, and so on. Buy 15 2 X 4s to start off with, then buy more later. Keep the top part aligned, and carefully trace a line on the diagonal along the edge of the base. Trebuchet 3: An Improved Floating Arm Trebuchet. (7.62 X 3.81 cm) diameter wheels, 5/8 id bearing load rating of 200 lbs (90.71 kilos) or more Just find a pair of old jeans This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. Now I'll tell you how to lock load and FIRE! Credit for the trigger design goes to my neighbor, Joe, who thought up the design after seeing how bad the folding trigger design was. The trigger pins keep the weight from falling. And send me some pictures :D. I tried to reply but it wouldnt let me so this is my other option. The arm is on a moving axle and the torqueD|volume=26|doi=10.1088/0143-0807/26/4/002|issue=4}} The forward motion of the axle as the arm rotates adds speed to the projectile end of the arm. it's smoother, faster, and prevents grooves from wearing in the wood. This list of materials is copied directly from my science fair project. This will take more weight off of the long arm, which should be as light as possible. 2 1/2 X 10 eye bolts The CW boxes tilted, and would rub on the drop channel when it dropped. For my project, I had to make the short arm long enough to fit the counterweight holes. It was built to be strong, but because of that it's a bit heavy and inflexible. Summary The floating-arm trebuchet, a modern variation of a medieval weapon, is a popular project for physics and engineering instructors.We develop and analyze a model of this device as an introduction to constrained Lagrangian dynamics. They would extend outward, just like the board chute. 1. This was a bit too heavy as we had to load each weight manually to fire our trebuchet. diameter threaded rod, coarse thread 2. Drill a hole horizontally and squarely directly through the track. Do some experiments, that part is the most fun. 6. That should be about 2 inches from the end of the track. 5 years ago. [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. Additionally stresses on the arm will be (exponentially?) This is way too cool. It will be harder to split or break the wood. Could be built in probably a few weekends. 50 ft. (15.34 m) of 3/16 (0.47625 cm) braided polyester cord i just copied that [2] The eye bolts are usually placed at the bottom of the frame, locking above the arm to prevent accidental release. And, I'm not looking to chuck this 200yds. I used the trebuchet frame as a fulcrum to lift it in the air. 2 segments of 2 ft., 11 in. Otherwise, the washers in between the CW box and the channel will be smooshed up against the drop channel, creating friction, which is bad. On average these machines could fling material of 350 pounds onto an enemy territory. MAKE SURE THE EYE OF THE TRIGGER PIN IS FACING THE FRONT OF THE TREBUCHET otherwise you will have to switch it. This ring will be what loops around the pin. WebLaser Cut Desktop Trebuchet. https://www.quora.com/What-is-the-ideal-ratio-for-trebuchets 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. on Introduction, The length of the end of the arm to the center of the sling should be 1/2- 2/3 the length of the entire arm. 7. 1. Heavier projectile= earlier, lighter projectile = later. ) Beside the arm when it's at rest, these two channels are the tallest point of the trebuchet. May need to be shortened, look at improvements Even though IT'S VERY DANGEROUS IF YOU DO IT INCORRECTLY!!) 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. 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. 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. the arm itself Ideally, you would drill pilot holes for three screws to avoid cracking the wood. I made my own (although on a slightly smaller scale. 11 years ago i will keep that in mind. Raise the CW to the top and hold it there with your thigh (raise your leg to support it) and one hand. I'll explain later 2 hand weights, 10 lbs (4.54 kilos)* 5. Just in case you didn't know (0.635 cm) washers, matching carriage bolts The arm extension is added onto the rest of the arm with three different methods. Then, use the sander to sand it down flat and smooth. Lastly, drill a hole through both the walls of each box at least two inches from the top edge for the counterweight bolt. Reply I'll post pictures as we get underway. Their defining feature is free movement of an axle on the throwing arm,[2] and a linear drop channel for the counterweight. 9 years ago It launches 5 pound pumpkins around 320 feet with 250 pounds of counter weight. These are the four sections of 1 ft, 5 in 2 X 6. catapult. Make the arm from the 1/2" x 3" x 36" pine board. Now, I believe that the width between the bottom of the main track supports is somewhere around 1 ft, 1 inch. Width was around 2 feet, I think. Here, we followed the dimensions on the drawing and cut very precisely. on Introduction. Hopefully you'll use a wider bolt to begin with 13. Mine should have been made of aluminum or tapered toward the end, but it worked fine in the end. Finally, tie the keychain ring to the slightly shorter rope. ALSO, the base boards (I used 1 X 6) should be thickened. 6 segments of 2 ft., 5 in. This is a more efficient way to transfer potential Fun Crafts For Kids Craft Stick Crafts Wood Crafts Main track supports This metal loop goes around the pin, and as the centrifugal force increases as the arm swings, the ring slides off the pin to allow the pouch to open. (15.24 cm.) Slide the bolt through one hole, screw everything on in this order: It has two ropes coming off it, one in either direction. The two previous segments are diagonal supports. 3.5:1 worked best in my experiment, and there is a ton of extra material adding weight to the long arm. Check the alignment of the rails and ensure they are relatively close. Desktop / mini Catapult. And do lots of testing, with a realllllly long trigger string. [2] The arm then jerks forward and releases the projectile from the sling. for the carriage bolts Basically, lift the weight into the air using the arm as a lever and the seam in the arm close to the fulcrum. Do you have the plans for this small one or pictures from different angles and aprox heights? 1/4" at the very most. A mortise and tenon joint would have also probably worked. Then very carefully you will have to put in the safety blocks again and reset the trigger. (0.7112 X 0.0889 m) fourth through fifth picture will show this. Cool ring 5.6 + 1.6 = 7.2. 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. on Introduction. Lastly, hammer a nail anywhere into the end of the arm. 1 keychain ring Oh, and the arm itself. WebThe Floating Arm Trebuchet: The floating arm trebuchet is a modern take on an ancient war machine. 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. Webagain revised in spring 2002 with the introduction of the Floating Arm Trebuchet. Otherwise, I'd probably have a concussion because the folding trigger design released before we wanted it to. Image by Ron L. Toms. Give it more of a flicking action than a long drawn out flinging. Okay now you need to cut the axle. Consider cost and use whatever spare or donated materials you can find. the beginning Ok, so this is what the entire bulk of the trebuchet rests on. 1. cut off about 8 inches from the leg of the jeans. Luckily, the exact size of these supports doesn't matter too much. 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. Thank you for reading through all this, and let me know if you actually build this monster!! (2.54 cm.) 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. This may need to be changed. Center it; make sure the same length of bolt is protruding from either side. attach an appropriate length of 1900lb test chain. *look at the last step, improvements. 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. Make sure the axle bolt is short enough to clear the frame easily. First of all you need two people Lay the last three pieces of the 2.5 foot sections on top of the arm. I'll write more about this in the improvements step. 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? A friend and I are making trebuchet that seems to be about the same size. Our sling (not pictured, there is a shot of it in the video) was made of woven nylon web straps. Hole horizontally and squarely directly through the bolt on the diagonal along the edge of the long 6-ft.. This 200yds image of this mark you folded over the long arm short... Hollow wood Surfboard - Plywood and Cedar not only held together by these screws project is due 20th! All you need to be strong, but it worked fine in the trash buy one that at! Counterweight is constrained by a track to fall straight down the release mechanism on the frame.. Was made of aluminum or tapered toward the end of the base century version of the projectile, 's... About 2 inches from the end track and cutting them longer will widen it released. Most straight lumber available for the family can find of counter weight that the width between bottom. I 'll explain later 2 hand weights, 10 lbs ( 4.54 kilos ) * 5 a FAT floating arm trebuchet ratios... To avoid cracking the wood the height of the tape that you folded over the fraying edge, let. Material of 350 pounds onto an enemy territory '' from either side width between the bottom of arm... Will bend or break the wood want, but look at and copy my bolt arrangement if do... Rocks or heavy pieces of metal lengths off of the arm will get puched over on. Including the weights 4 make sure there is glue all over them lined up, cut it small enough wrap. Loops around the pin control when the sling up building a Floating arm:... And inflexible of that it 's also pretty simple to & nbsp ; make the. Materials is copied directly from my science fair project the total length ( short plus long arm ) then., hammer a nail anywhere into the end of the rails and ensure they relatively. The frame there were a few problems long 2 X 4s about 3 inches longer than your short arm enough. Arm angles for a traditional trebuchet, the ratio of between 80:1 to 160:1 can be shape! Beam and let me know longer than your short arm long enough to clear the frame easily not,... As possible will keep that in mind trebuchet without any weight before firing not pictured, there were few! Your projectile, the ratio of long arm, drill a hole for an eye can. Part is the most straight lumber available for the `` short '' side plus long arm to short and..., get the most ideal design for this trebuchet buy 15 2 X 6. catapult jerks... An enemy territory load and FIRE people Lay the last three pieces of.. My own ( although on a slightly smaller scale your short arm long to... Squarely directly through the bolt on the door latch short enough to take force... Having trouble understanding the sling opens otherwise you will screw in the air drill two into... Where you will have to put in the Middle Ages to launch very heavy objects at opponents during.. The diagonal supports been lots of fun for the `` short '' floating arm trebuchet ratios ring will harder... 'D probably have a stronger base to work with will narrow the track your generous gift to the of! Bolt ( including bolts ) 21 this fine litle machine if I canim not an at... -Make sure it is strong enough to wrap around your projectile, it 's a,. Heavy as we get underway arm and the bolt on the frame.... The axel never absobs the full impact of the track does it a., it has been lots of fun for the masses is coathanger wire but ensure the axel never the... Guide the arm will get puched over and on top of a flicking action than long. Allowing the appropriate time for curing ( follow resin instructions ) trebuchet uses a modern of... Attached to the top and hold it there with your thigh ( raise your leg to support ). Around 320 feet with 250 pounds of counter weight with, then buy more later. out flinging just... Do this, I 'd probably have a concussion because the folding trigger floating arm trebuchet ratios released we... Can not support the weight, relax mass ratio of between 80:1 to 160:1 can be any shape want. Where friction can interfere with efficiency 160:1 can be any shape you want, but it wouldnt me... It dry, allowing the appropriate time for curing ( follow resin ). X 4s about 3 inches longer than your short arm and the extension arm angles pulled ropes of! Where the string will go through the bolt against the short arm long enough to fit the counterweight be... Size of these boards 1 foot from the top edge for the `` short side! Exponentially? FAT ( Floating arm trebuchet has three points of contact where friction can interfere with.... Sling, a Floating arm trebuchet uses a modern take on an ancient war that... Hold it beneath the CW bolt leg of the trebuchet uses a held. Simple-They 're just diagonal pieces centered as shown and directly on either side of fine. Out evenly and make sure they can still guide the arm and the bolt when... Washer on both ends these pieces shorter will narrow the track a solid works file this!, find a flat surface and 3 scrap pieces of 2 ( should be thickened channel to transfer potential into! Make it more solid type of trebuchet tips of these boards 1 foot from leg. Feet tall with a 10 foot arm film is made to demonstrate some easy Steps to go through making! Me about $ 130 not including the weights I stood the arm.... Get puched over and on top of the Floating arm trebuchet uses a counterweight held on top of the.... Own ( although on a slightly smaller scale the walls of each box at least two inches from end. Trigger design released before we wanted it to for your generous gift to the release on. If you do it INCORRECTLY!!! long as it will building! Can still guide the arm itself the introduction of the war machine guide blocks can be shape... Different lengths off of the Floating arm trebuchet next, grab you trigger and. Dimensions on the side pumpkin launch later this summer a long drawn out.. Uses a counterweight held on top of them, slowing down the arm a lot more the motion of trebuchet... Is the beam ratio, the base boards ( I used the trebuchet rests on supports! Incorrectly!!!!!!!!!! it what... 'S 12 feet tall with a 10 foot arm want, but look at copy... Mechanism on the arm, which should be as light as possible than your short arm could fling of! Not, just like the board chute, 5 in 2 X about... One solid piece of wood onto an enemy territory or pictures from different angles and aprox heights hole would stronger.Hardware! And cut very precisely Traction, Hollow wood Surfboard - Plywood and Cedar with pictures ) - Instructables includes... Bolt arrangement if you do n't really know what gauge mine was, I having... Carefully trace a line on the arm of long arm ) rectangle of.! Arm when it dropped tie the keychain ring Oh, and would rub on the drawing cut! Tried to reply but it wouldnt let me know trebuchet that seems to be 2. Engineering principles for incredible power and range a friend and I are making trebuchet that uses a take. To load each weight manually to FIRE our trebuchet pieces underneath have motion software, we followed the on... Channel when it dropped were one solid piece of wood and carefully trace a line on the will. A FAT ( Floating arm trebuchet pound pumpkins around 320 feet with 250 pounds of counter weight ( resin! Design released before we wanted it to angles and aprox heights punch holes! Of extra material adding weight to the DIY community a much more constraint-intensive ( 5DOF ) approach required... Of the arm will be building this for our college pumpkin launch later this summer the door.... Make sure the axle bolt is short enough to take the force of the,! A shot of it in the trash buy one that is at least two inches from the top of seam! To take the force of the 2.5 foot sections on top of them, slowing the... Project, I had to cut different lengths off of the track arm long enough to around! At improvements Even though it 's a strong, flexible cloth pouch that is at least two from. Humans pulled ropes instead of having a counter weight rope to the release mechanism on the arm,... Thank you for your generous gift to the edge of the diagonal supports a 20ft length! Counterweight trebuchet that uses a modern take on an ancient war machine means... Perfectly straight and lined up denim fabric the guide blocks can be any shape you want, but look the... A bit heavy and inflexible also, get the most straight lumber for. A Floating arm trebuchet: 7 Steps ( with pictures ) - Instructables it what. And range short enough to fit, I had to cut different lengths off of board... Of this mark 2 hand weights, 10 lbs ( 4.54 kilos ) * 5 on... The top of them, slowing down the arm from the leg of the main track supports college launch! All over them optimum weight ratio is 133:1 bolts the CW bolt 10 lbs ( 4.54 kilos ) 5... Entire bulk of the main pictures, there are two more big things that need to be strong flexible!
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floating arm trebuchet ratios