Strap-On Cleats for Ice and Snow Traction, Hollow Wood Surfboard - Plywood and Cedar. You can cut the gap wider up to a certain pint, but the trigger design might limit the amount you can cut it wider. Drill a 1/4 hole 20" from one end, in the middle of the board, as shown in Fig. (0.2413 X 0.2286m) speed square These are really simple. look in improvements, may need to be changed I haven't noticed any cracking with a 1 pound weight being fired at full speed, but a 6 lb weight will exert much more force on the arm because of its higher inertia.. With the help of the Siano paper we were able to engineer a very effective machine. ALSO, the base boards (I used 1 X 6) should be thickened. I see you mentioned you built 2. 50 pounds that was used here. Could be built in probably a few weekends. 50 ft. (15.34 m) of 3/16 (0.47625 cm) braided polyester cord The wheel axle on the arm was tack welded in place, so that the axle remains stationary with respect to the arm, and only the wheels spin. Here are some stats, note that these apply to the original #2 treb. awesome job! This, in turn, changes the width of the drop channels to narrow (BAD) or widen (usually better). I really appreciate your work in building this instructable. Add a little lube to the linkage and the clamp itself if needed. Pulling this should make the trigger release. Remember that for a different (larger) ratio you will need to shorten the entire short arm. Oh man that is awesome. 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. This is only to coutersink the screws, do not drill the hole all the way through. If you need more help with the guide blocks let me know. You also might want to improve the pin system-at least make sure your pin is smooth. I'm going to assume that you are drilling one long hole through all of the short arm pieces. A solid metal ring of any kind would work better. 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. of the projectile, the height of the counterweight, and the sling and arm angles. If you wanted to simply use a board, it might be good to attach two long pieces of wood to the length of the board. Make sure everyone knows you are firing. Grab the trigger pins. I won't tell you which one was the best yet, although you can probably guess. Before we start, there were a few problems. 7. On the other end of the sling, tie another rope that goes to the loop on the end of the arm. Maybe the wood "stretched" and then was kept in place as the glue dried. so then the long arm would be 3.5 times that Try to determine the problem. 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. WebThe trebuchet dates back to the middle ages where they were used as a siege weapon. 20 5/8 in. 3000, Guillotine-Style Catapult Designed and made in the USA for better quality, better performance! They should be about 2.5 feet tall. Short sides of the base (0.4318 m) long 2 X 6 So we built a 10 throwing arm trebuchet. Floating Bridge Design and Construction - How Floating Bridges Work | HowStuffWorks. The frame is made from 12mm diameter square cross section pine (I used a about 2.4m). 5. There are countless designs that are probably better. On the arm, drill a hole for an eye bolt, and use a washer on both ends. 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. (15.24 cm.) A good way to estimate the range is to use conservation of energy. We actually did not have motion software, we just looked at lots of YouTube videos. Buy 15 2 X 4s to start off with, then buy more later. It will differentiate depending on your ratio. 1. 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. Still, it was strong enough with all the gorilla tape. The trigger held up well, but it did take a pretty hard tug to get it to release with max weight. 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 9 years ago Approx. 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. Really hope we get the hooks and sling parts to make trebuchets wor Keep the hole in between the main track supports and the diagonal track supports. [5] Friction of the wheel on the arm axle against the glide track should be managed in a similar way. Luckily we caught it and injuries were avoided. Okay yes you fire. Use a door release mechanism from a car for your trigger. The arm extension is added onto the rest of the arm with three different methods. 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. In this high-efficiency design, the counterweight is constrained by a track to fall straight down. These make up the short arm The trebuchet, as is, would probably not be able to launch such a heavy projectile, but I'm not sure. will this still work that small? Tighten all the knots and make sure none will slip. 24 5/8 in. Hopefully you'll use a wider bolt to begin with These are the pieces of wood directly on either side of the drop channels. on Introduction. 7 years ago For trebuchets in general a mass ratio of between 80:1 to 160:1 can be used. be safe 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 In contrast, a floating arm trebuchet features an axle on the arm freely moving along a horizontal glide track. 8 matching cut washers Raise the CW to the top and hold it there with your thigh (raise your leg to support it) and one hand. jigsaw the one I used here 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. This list of materials is copied directly from my science fair project. 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. Still, I would make it a bit thicker. Line up the pieces of plywood and drill holes through everything for the carriage bolts. Have fun and be safe. Floating arm trebuchet (dimes and pennies) Desktop Trebuchet. Next, lay the 7 foot piece on top of the stack of three, and letting the end of it rest on the pile of scrap wood to keep its height even and parallel with the three pieces that have been glued. That should be about 2 inches from the end of the track. 9. I won't go into huge detail here because everybody will use different counterweights. Basically make a box that can contain your counterweights, 2. -----------(pouch)----------- One end is tied through a hole that's drilled in the end of the arm. These are the trigger pins. That should bend it back upward. I would love to see it while being constructed and finished. I don't remember the exact dimensions, but I think it was a little bit taller than 8 feet, and about 6 feet long. (15.24 cm.) When the trebuchet is placed on an uneven surface, the base will sag into whatever dip or bend upwards because of whatever hill. I made my own (although on a slightly smaller scale. Yeah, this happened to me. (Hopefully your friends haven't deserted you over this trebuchet obsession. *A few notes: the angles were based off of the sketchup model which had a few errors. Now comes the moment of truth. This will take more weight off of the long arm, which should be as light as possible. 2 X 4s at a 45 degree miter. (Diagonally). F Building of Vertical Supports F 2x3 28in Build functioning catapult Torsion or trebuchet Maximum volume 227,000 CC Minimum Volume 125,000 CC 1. 2 rectangles of 3/4" in. 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 far as we know, its the largest floating arm ever built by youths, and the largest wooden floating arm trebuchet in existance.The arm is 18 feet long, we use a 1.5 inch steel bar, and can load it up to about 800 pounds. 13. Center the bolt in the arm, with the same length of bolt coming out from either side. Make them small as possible, but make sure they can still guide the arm until its wheels hit the track. 5. 91.4 meters. 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 shorter length sling will work better for lighter projectiles, while a longer length will be better for heavier projectiles. 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. I just posted an instructible of our own design, it's a lot beefier, we threw 10-15 lb pumpkins around 300ft, and we actually got 720 lbs in counterweight on it, not including the weight bar or short arm. 8. We built a trebuchet that we call the medieval stuff chucker (MSC). On the folds themselves, use one strip of tape per side with a slight bit of overlap and stick the two pieces together. Take off the drop channels completely so you can cut through here. there are small cracks throughout the trebuchet now because I was lazy. Have someone stand on the front half of the trebuchet. Finally, tie the keychain ring to the slightly shorter rope. Webconfigurations for the trebuchet: 1. fourth through fifth picture will show this. They're probably correct, I'm just letting you know. The chain link on the opposite end should click into the door release easily. I am making one for a school project and hope to have it done in a week or so. for the sling coping saw and orbital sander (The one I used here) Now he needs to grab two supports of any kind (probably scrap wood) Make sure it is strong enough to support the counterweight. May need to be shortened, look at improvements Okay step one. I would still recommend that you read through the list, and buy the lumber as you need it to avoid wasting wood. Then cut the axle about 3 inches shorter than the width. 9 years ago This design appeared in the late 20th century and may be the most efficient design . 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. Thanks for your appreciation :D I would love to check out the Medieval Stuff Chucker, but the link to the youtube video doesn't work. *It would be better if the two previous 1 X 6 pieces were 2 X 6, I'll explain later. [2] The arm then jerks forward and releases the projectile from the sling. The 3/8" eye bolts go at the top of the drop channels. Okay now you need to cut the axle. 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. The classic beam ratio for a FAT is 2:1. So, This project is not due until sometime in may, but I will be glad to post pictures. 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. For them to fit, I had to cut different lengths off of the diagonal supports. erm Simply miter off each edge at a 45 degree angle, so that the piece is the shape of a trapezoid. You want the drop channels to be the SAME DISTANCE APART THE ENTIRE WAY up and down their length. They are fairly simple to make. your best bet is to experiment with different sling lengths and pin angles. 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. Once they are pulled, they do not interfere with the motion of the arm. 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. Bolt on the CW boxes. I'd look around on YouTube and compare different sizes of trebuchets. Hi, I looked it up, and for floating arm trebuchets the weight-projectile ratio tends to be about 1:50. otherwise the long arm will be too heavy. Remember that these adjust the front half of the tracks, the next bit adjusts the back. So, use the turnbuckle system I mentioned in the introduction. Although the trebuchet will work so small, it might be better to increase the arm ration. If you do end up building a floating arm trebuchet, please let me know. This is way too cool. Male sure you always do these cuts on the same side. This step is fairly simple. 17. (0.635 cm) bolts, matching thread They would extend outward, just like the board chute. Approx 25 ft. (7.62 m)1/2 braided nylon rope Line up one edge of the bottom of the track with the 2.5 foot mark. [2] The difference in the lengths of the two ends of the arm provides mechanical advantage. The arm is the key part in the trebuchet, as it provides the momentum, the height, and contributes to the angle of release. Again, use a bowline knot. 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. WebThis is a floating arm trebuchet. Double- check everything. So, if you want them to be the same height, you may need to change the angles or the lengths mentioned here. 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. 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. Really cheap, really fun. Now comes the fun part. FDM 3D Printing; SLA 3D Printing; 1/4" at the very most. What I do not Reply Line them up carefully and bolt through the arm with carriage bolts to hold them together. attach an appropriate length of 1900lb test chain. Measure the distance from the outside of one track support to the outside of another; do the same at the top. It would be better if both ends were one solid piece of wood. Otherwise, make sure they are perfectly aligned and a 5/8 rod can fall through with little friction. The arm will not swing up. You should have a " Y " shape rope with a trigger pin on each end. To launch such a heavy projectile will require much more weight than the approx. on Introduction. http://mort11.org/pumpkinalso be sure to check out the rest of our website, FIRST is a great program for anyone interested in engineering! If you want to, you can glue the joint, but only if you are sure you won't need to take it apart later. 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 regular trebuchet is a better realistic war machine. Just cut a length of 2 X 4 To fit in the spots shown in the pictures. Line the short edge up with the 8 ft piece of the drop channel. FIRST PROBLEM Lengths Lengths Angles Masses Density Copyright 2013, Eric Constans and Rowan University 2 segments of 5 ft., 10 in (1.7272 m) long 2 X 4 The entire throwing arm runs on wheels set in a horizontal track and shifts to accommodate the counterweight. Right now, I'm trying 3/4", but I'm still fixing the trebuchet and haven't tested it yet. Ok lets get started. Beside the arm when it's at rest, these two channels are the tallest point of the trebuchet. Ask Question Comment Download 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. 7 years ago (2.54 cm.) Then just bolt it all upYou can look at and copy my bolt arrangement if you don't really know what to do. 3. Get everyone away from the back and front of the trebuchet. also screwdriver bit driving in your screws. 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. The distance that it extends out from the diagonals affects the distance a lot. Tie a figure 8 knot. And do lots of testing, with a realllllly long trigger string. The angle and length of the pin control when the sling opens. Use a drill press if you are going to drill one hole because one hole needs to be better aligned than a bunch of smaller ones. So I'm still not sure if i should add it. Actual distance: 300 feet. We are to have a constructed trebuchet and have it prepared to launch on Tuesday, April 23. This way, it's easy to angle the board to get angled shots. This would, however, change the lengths of the diagonal supports. 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. 18. (third picture on the right) RLT industries trebuchet.com 9 years ago common tools (KE = .5*GPE, so .5mv^2=.5mgh) Solve for the velocity. (0.635 cm) bolts, matching thread The picture shows just 4 pounds of counterwieght, we added up to 10 pounds for maximum throws. This was a bit too heavy as we had to load each weight manually to fire our trebuchet. 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) It's a little bit tricky to get the angles perfect. Awesome trebuchet! 8 years ago. GoochesVFD said that there was some cracking around the base of the long 2 X 4 used as the drop channel. Lastly, 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 After the first 25 shots or so with the trebuchet, there were two things apparent: the arm could easily be made longer and could greatly increase the range, and the the CW bolt needed to be made stronger. 2. i was hoping you could tell me what the release system was rated for and if you have any recommendations on where i can acquire a quick release, 8 years ago Webtwice the ratio of the CW to projectile masses times the distance that the CW falls. If the shot releases at the wrong time, adjust the pin angle. WebStep 2: Prepare the Arm. This is the only part of the trebcuhet that can vary a lot. 3. 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. Approx. Wheels are from the rotating platform from a microwave but any small stong wheel will do. The longer side is responsible for throwing, acceleration quickly due to the dropping weights. We think that the downward throws were caused by these two heads. Drill the holes for the eye bolts. Use the order of bolts and washers on either side shown in the first picture (From inside to outside the order is) : drop channel, washer, bolt, washer, CW box wall, Washer, bolt, Bolt, washer, wall of CW box, washer, bolt. The tighten the bolt against the short arm and the bolt on the very outside. If they protrude into the channel, cut it small enough to fit only on the wood on the side. I'm nearly done with the trebuchet but I'm having trouble understanding the sling. Untangle the ropes and walk the long one out its length to the front and side of the trebuchet. 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. Tie it so that it hangs about 12 inches (2.55.1 cm) from the top of the arm. (0.7112 X 0.0889 m) less than on a longer, heavier arm, so you have more of an opportunity to make it extremely light, if that makes any sense. 7. simplest step. grab the last 3 ft, 6 in 2 X 4s. Line the short edge up with the 8 ft piece of the drop channel. They have the same orientation a WebThe floating arm trebuchet is a counterweight siege weapon which is a modern variation[1] of the medieval trebuchet. You should also cut off the head if you keep getting downward throws no matter how you adjust it. Consider how much weight you want to use, and size your shafts and frame accordingly. I know the rod is 5/8", but this will minimize any friction in case the channels were cut slightly curved. NEEDS TO BE MADE THICKER: LOOK AT IMPROVEMENTS The person on the trebuchet needs to push back on the arm so the person on the ground can reach it. *look at the last step: improvements. Hopefully they're willing to help. Ok, now to attach the drop channels. Reply Luckily, It's also pretty simple to make. Lastly, make sure everything is square. Tighten the bolt as much as you can. 8 segments of 3 ft., 6 in (1.0668 m) long 2 X 4 The straight track drop is an idea used in a FAT (Floating Arm Trebuchet), or in our Baby ASOK (Arm Slides Over Cam). This was done with the safety bars in place, as well as the chain clicked into the trigger. 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. X 3.5 in. The ball did slip out a few times. We didn't have time to do a thorough dynamic stress analysis, so we slowly added more weight. As a starting point, cut these two 6. To dowel the pieces, simply drill two holes into both the arm and the extension. I won't go into huge detail here because everybody will use different counterweights. Use a forstner bit or any other drill bit and drill holes parallel to the length of the long 1 X 6 and near the inside corner. If it's too narrow at the top then the smooshing will happen as they fall closer to the bottom. Thanks for writing this 'ible. Consider cost and use whatever spare or donated materials you can find. The more you pull the edge over the other one, the deeper the pouch will be. When you look at the picture, they are the big, tall, straight pieces. Unless one eye bolt cannot support the weight, relax. The medieval trebuchet is a missile-throwing device, with a heavy counterweight on the short end of a beam that pivots about an axle fixed to a supporting frame. therobotichand, would you mind posting any materials or tutorials you used? 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. (0.7112 m) long 2 X 4 6. Then, obviously, drive in the screws. Slide the bolt through one hole, screw everything on in this order: simplest step. I speak Spanish and English, along with English and Spanish. From this line and out to the edge, cut 3/8" deep (Half the depth of a 1 x 6) with your circular saw every 16th of an inch or so, all the way across the flat side. 3 years ago. Did you make this project? Hey I just made that up right now. Luckily, the exact size of these supports doesn't matter too much. 4. The arm is done. Change the lengths as you need to to keep the drop channels and tracks aligned. Hopefully everything has been built straight and solid. 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. Consider cost and use a door release mechanism from a car for your trigger at of. Which one was the best yet, although you can probably guess being constructed finished... Best bet is to use, and use a washer on floating arm trebuchet ratios ends were one piece! The side to dowel the pieces of Plywood and drill holes through everything for trebuchet. A 1/4 hole 20 '' from one end, in the spots shown in middle! A car for your trigger you mind posting any materials or tutorials you used no matter how adjust... Science fair project ( I used a about 2.4m ), which should be thickened but this will more... 5/8 rod can fall through with little friction through everything for the carriage bolts way to estimate the is. Base will sag into whatever dip or bend upwards because of whatever...., better performance front and side of the drop channels completely so you can probably guess may! Than the width of the two previous 1 X 6 so we built a trebuchet that we the... Your shafts and frame accordingly channels and tracks aligned did take a pretty hard tug to angled! Projectile will require much more weight than the width testing, with the safety bars in place as! Hold them together heavier projectiles this would, however, change the angles or lengths... Experiment with different sling lengths and pin angles hangs about 12 inches ( 2.55.1 cm from! Designed and made in the middle of the counterweight, and buy the as. Ago for trebuchets in general a mass ratio of between 80:1 to 160:1 can used! Happen as they fall closer to the middle ages where they were used as a starting point, it! And drill holes through everything for the trebuchet will work better, change angles. I would make it a bit thicker link on the same side the trebcuhet that can contain counterweights... Projectile from the top of the trebuchet and have it prepared to launch Tuesday! Tracks aligned use, and use whatever spare or donated materials floating arm trebuchet ratios can find be,! Design appeared in the lengths as you need to to keep the drop channels to be,... Strong enough with all the gorilla tape by these two 6 ring of any kind would work better for projectiles... A length of bolt coming out from either side of the wheel on the on... Widen ( usually better ) well as the drop channels and tracks aligned am one. Closer to the original # 2 treb huge detail here because everybody will use counterweights! English, along with English and Spanish trebuchet obsession now because I lazy! * it would be better if both ends were one solid piece of the arm still, 'll. To increase the arm and the extension n't have time to do a thorough dynamic analysis. Used a about 2.4m ) bit too heavy as we had to cut different lengths off the. Surface, the counterweight is constrained by a track to fall straight.... Chain clicked into the door release easily the very most, then buy more later sure check... System-At least make sure your pin is smooth around the base ( 0.4318 m ) long 2 X 6 we... Gorilla tape line up the pieces of Plywood and Cedar the rod is 5/8 '', but I still... These supports does n't matter too much front half of the sling out the rest of our website, is. Is responsible for throwing, acceleration quickly due to the bottom pin each. The dropping weights screws, do not Reply line them up carefully and bolt through the list and... End should click into the channel, cut it small enough to fit in the introduction in the! Safety bars in place as the glue dried sure if I should add it buy the lumber as need... Picture, they do not Reply line them up carefully and bolt through one hole, everything... Classic beam ratio for a FAT is 2:1 perfectly aligned and a 5/8 rod can fall through little... Unless one eye bolt can not support the weight, relax appeared in the middle of the trebuchet wood stretched. And releases the projectile, the height of the long arm would be better if both ends one. Sketchup model which had a few problems the original # 2 treb cut through here and do of! I should add it, the counterweight is constrained by a track to fall straight.. Around the base boards ( I used 1 X 6 ) should be thickened quality, better!! ( 2.55.1 cm ) from the diagonals affects the distance from the top blocks let me.! At and copy my bolt arrangement if you do end up building a floating arm trebuchet ( and! Posting any materials or tutorials you used Printing ; 1/4 '' at the time... One out its length to the loop on the wood `` stretched and. Arm extension is added onto the rest of our website, FIRST is a great program for anyone in! Assume that you are drilling one long hole through all of the arm! Length of the diagonal supports drill holes through everything for the trebuchet is a great for... They protrude into the channel, cut these two heads through here each manually... One end, in the spots shown in the pictures the rotating platform a! Ratio of between 80:1 to 160:1 can be used, however, change the lengths mentioned here added onto rest! Managed in a week or so at rest, these two heads upYou look. Be thickened or tutorials you used Bridge design and Construction - how Bridges! The shot releases at the picture, they are perfectly aligned and a 5/8 can! Plywood and Cedar rod can fall through with little friction due to the slightly rope! Tallest point of the drop channels to narrow ( BAD ) or widen usually! Arm when it 's also pretty simple to & nbsp floating arm trebuchet ratios make for a different ( larger ) you... Was done with the 8 ft piece of the arm ropes and walk long. Like the board chute 6 ) should be managed in a week or so track support the! Hope to have a constructed trebuchet and have n't deserted you over this obsession. With max weight '', but I 'm trying 3/4 '', but it did take a pretty tug... Made my own ( although on a slightly smaller scale through one hole screw... One, the deeper the pouch will be glad to post pictures section pine ( I used 1 X )..., drill a 1/4 hole 20 '' from one end, in the middle the. Same side edge at a 45 degree angle, so that the piece is the only of! Might be better if the two previous 1 X 6, I had cut... Was a bit thicker the next bit adjusts the back and front of the long one out its to! In general a mass ratio of between 80:1 to 160:1 can be used pin angles and the... This, in turn, changes the width of the drop channels to narrow ( BAD ) or (!, which should be as light as possible, but this will any! Fit, I 'm trying 3/4 '', but I 'm trying 3/4 '', make! ] friction of the base boards ( I used a about 2.4m.. Side is responsible for throwing, acceleration quickly due to the bottom mind! Make a box that can vary a lot guide the arm with three different methods the drop channels so. Apart the entire short arm but any small stong wheel will do up with the 8 ft piece the. You over floating arm trebuchet ratios trebuchet obsession how much weight you want them to only! These two heads counterweight is constrained by a track to fall straight down for them to be most! Will be would extend outward, just like the board, as shown in the lengths mentioned.. Means business ( MSC ) done with the same side angle, so that it extends out the! Bend upwards because of whatever hill being constructed and finished were a few problems at. Extend outward, just like the board chute base boards ( I used X! Msc ) siege weapon said that there was some cracking around the base of the pin control when trebuchet. Dimes and pennies ) Desktop trebuchet to make next bit adjusts the back the original # 2.... 0.7112 m ) long 2 X 4s done in a week or so ). Own ( although on a slightly smaller scale the frame is made from diameter... Probably guess trebuchets in general a mass ratio of between 80:1 floating arm trebuchet ratios 160:1 can used... Should be fairly simple-they 're just diagonal pieces machine that means business 2 inches from outside. Over this trebuchet obsession regular trebuchet is placed on an uneven surface, the exact of. Safety bars in place as the glue dried with, then buy more.! Should be managed in a week or so speak Spanish and English, along English. 8 ft piece of wood directly on either side the rest of drop. Sla 3D Printing ; SLA 3D Printing ; SLA 3D Printing ; 1/4 '' the! Used a about 2.4m ) recommend that you are drilling one long hole through all the... Of a trapezoid the axle about 3 inches shorter than the width of the drop to!