You can pretty much change the positions of these pieces as much as you want, but the positions they are in now worked great for me. Grab your nylon rope and cut 4 feet off the end. 42. Actual distance: 300 feet. Also, get the most straight lumber available for the longer pieces on the frame. Fairly simple trigger design. There are plenty of places you can go on the internet to look for better ideas. Taper the arm from a full 3" at the axle to 1" at the finger end of the arm (Fig. Or you could buy a longer beam to begin with. WebAn important part of whipper performance is the beam ratio, the ratio of long arm to short arm. This one worked, but it was just a bit heavy, small and inflexible. 10. This is the only part of the trebcuhet that can vary a lot. You will need the denim and the monkey- no, sorry, gorilla tape. You also nee ), but I came up with distances reasonably close to the actual performance. Now I'll tell you how to lock load and FIRE! Simulated distance: 316.6 feet. And back up at least 20 feet when firing (The sides are safest) 2 segments of 1 ft., 0.5 in. 3/8 X 4 eye bolt (Including bolts) If not, just measure the distances on each piece as accurately as you can. 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 5.Next find the center of the folded edges. So if I could toss the weight a 100yds would be perfect. The radios of rail height/overall drop, arm length, counterweight/projectile weight, wheel size, etc were all guessed based off existing trebuchets from internet sources. I've seen some really nice f2k's that have the wheels jump the gap on a ramp, but that would require much more engineering calculations and dynamic tuning than we had time for. I have real pictures, but no sketchup ones. Attach a 20ft + length of rope to the release mechanism on the door latch. Put the ratio hole wherever it goes. 3.5+1 represents the total length (Short plus long arm). Trebuchet 3: An Improved Floating Arm Trebuchet. it just over 24 inches tall I can provide more detailed dimensions, advice, and tips if you wish, just let me know. Do you have any instructions or tips perhaps? 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. This may need to be changed. 9. I won't go into huge detail here because everybody will use different counterweights. Basically make a box that can contain your counterweights, If you have a certain ratio in mind but you do not know the lengths, use this example: The angle and length of the pin control when the sling opens. (1.3462 m) long 2 X 4 i will keep that in mind. Advertisement By: Nathan Chandler Floating bridges are uncommon in large part because the kinds of situations and environmental criteria for them are unusual. We actually did not have motion software, we just looked at lots of YouTube videos. ALSO, the base boards (I used 1 X 6) should be thickened. Hopefully everything has been built straight and solid. Webi'm working on a quick sketch for a floating arm trebuchet i'm making in an engineering class and need help selecting and using the correct mate tool in the on shape assembly tool. Unlike now, the humans pulled ropes instead of having a counter weight. 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. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. Stick a few inches of tape over that area, making sure you get it on the inside and outside of the seam. 4 segments of 1 ft., 5 in. It shouldn't be too deep or to shallow for your projectile, and should hug the surface of your projectile well. I would still recommend doing one, though. Then fold in on top of the other one to crinkle the pouch into a more pouchy shape. It was an old rusty double- headed nail. If I need to bring the scale down, what would the dimensions be? Use a wrench to thread the threaded rod through the holes you made..make sure it fits and is level. Lastly, hammer a nail anywhere into the end of the arm. The frame is made of 4x4 held together with deck screws and carriage bolts, and our design allowed for the frame to be removed from the base with bolts only. Arm-sling constraint, arm roller on fixed track, projectile above ramp. At the tip of the arm, we welded a steel box around it to hold the pin for the sling release and a loop to tie the other end of the sling rope to. 91.4 meters. It launches 5 pound pumpkins around 320 feet with 250 pounds of counter weight. Tools This is what fit for me. A good way to estimate the range is to use conservation of energy. The CW bolt MUSTbe made thicker and stronger, otherwise it will bend and cause problems. ) You may even be able to get away with less. 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. Reply 4 years ago. I used the trebuchet frame as a fulcrum to lift it in the air. To reset the device, the counterweight must be raised back to the original height and locked in with the trigger mechanism. 1. pretty simple step. It's 12 feet tall with a 10 foot arm. And, I'm not looking to chuck this 200yds. jk. these are the trigger pins 2 segments of 3 ft. (0.9144 m) long 2 X 4 2 screws for each mitered channel support. 6 1/4 in. 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. these are the trigger pinsWheels, weights 1/4" at the very most. 6. It should be drilled all the way through the flatter 3.5 inch edge side. 3. For this step you will need four of the eight 3.5 ft pieces, and the two 6 ft. long pieces. This step is fairly simple. First, you need to know Their defining feature is free movement of an axle on the throwing arm,[2] and a linear drop channel for the counterweight. Thinking *this is not funny only annoying* 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. Thats a bit longer than 7 feet because i rounded 7 4.5 up, it was really 1.55555555 thick plywood, 2 ft., 5 in. The first picture shows what this looks like. The straight track drop is an idea used in a FAT (Floating Arm Trebuchet), or in our Baby ASOK (Arm Slides Over Cam). Measure the amount of space in between the drop channels. Also, the box needs to have a top so the weights don't come flying out when it reaches the bottom of the drop. if theres is any other advice that you can give me (especially for it being smaller) it would be a lot of help. Then, drive in the screws. Hopefully you'll use a wider bolt to begin with Punch the holes centered as shown and directly on either side of the seam. DRILL PILOT HOLES FOR EVERYTHING!!!!!! Their defining feature is free movement of an axle on the throwing arm,[2] and a linear drop channel for the counterweight. Then just screw them in. A pair of wheels allows the arm to roll along 3. Allow about 1 week before firing your trebuchet. circular saw (The one I used here) OR miter saw AND table saw So, again, cut off the ends of all the 1 ft, 5 in. I've made the pouch and strung one side through but from then on I'm lost. Drive 3 screws through the track and into the supports, then three more through the base and into the supports. 2. The guide blocks can be any shape you want, but look at the picture notes below for shaping. Leave a comment!!! Remember, smooth transitions. Yes i am proud to be This is the pin. (Hopefully your friends haven't deserted you over this trebuchet obsession. Follow the measurements given of the depth and width of the cut. This will be the top. for the carriage bolts What did you finally use for the rollers? 5. Take a look at our trigger design if you ever want something that works for heavy payloads. First, grab two of the 8 foot long pieces. Consider how much weight you want to use, and size your shafts and frame accordingly. They're probably correct, I'm just letting you know. Add a little lube to the linkage and the clamp itself if needed. Really hope we get the hooks and sling parts to make trebuchets wor Our arm was made of many pieces of layered plywood held together with resin and deck screws. 1.6 X 3.5 = 5.6 I have no clue what it is for f2k, but it is a more efficient trebuchet. 8. (remember the CW is supported by the trigger at the beginning, and the the trigger is screwed directly into the drop channels. ) Diagonal Track supports. yes, it works 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 This allows us to swap out pins, or adjust forward and backward. 2. Ok, so this is what the entire bulk of the trebuchet rests on. It's 6 feet long and 2 feet wide. And it is constructed with 1 X 6s That's its fa A regular trebuchet is a better realistic war machine. Alternatively, you can attach a heavy weight such as a 20 pounds (9.1 kg) hand weight directly to the end of the arm. 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. WebFloating Arm Trebuchet - Hobbyist Version The F.A.T. That's its fault. We built a 1/3 scale model that throws a 1 pound projectiles 340 feet + with 70 pounds of counterweight. 4. The hardest part, really, is getting the angles correct and then cutting them accurately. Just as a reminderremember to add glue This is the hardest part of loading. For the trigger you will need the: 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. Again, this is not a critical dimension, something near that would work. Make them small as possible, but make sure they can still guide the arm until its wheels hit the track. Hi, read your comment, Need some advice please, if you don't mind. He was right. WebHow to make a Floating Arm Trebuchet. For my project, I had to make the short arm long enough to fit the counterweight holes. (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 am making one for a school project and hope to have it done in a week or so. Cut through here. Jump to page: DocBrown. To get it in, you need some sort of head on it for the wrench. As it turned out, our design was over built and held up well. Again, use a bowline knot. Once everything is square, true, straight aligned or whatever you feel like saying, We can put this beast together. I Have to build a Treb (much smaller scale), for physics assignment - any advice, for height restrictions of 60cm (just under 24inch) and area of base 900squared cm (just under 140 square inch) - to throw golf ball minimum 100 feet - done some research and most suggest floating arm mechanism would be better option? So, you need to drill the holes four inches deep into both the arm and the extension. Since one is steeper than the other, this meant that the vertical height ended up different. After a certain point, the drop channel 2 X 4s will have to be made thicker so they can still hold up the CW. these will be used in the trigger Basically, put them in the corner where the main track supports and the track meet. Drill a 1/4 hole 20" from one end, in the middle of the board, as shown in Fig. 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. Spread them out evenly and make sure none of the holes go through the bolt holes. wood screws, phillips head drive, #8 MATERIALS LIST: -Lumber (4x4, 2x4, plywood) -Deck Screws (lots of them) -Carriage bolts, nuts, washers -all thread, 1/2", 1ft sections (for sling pins) -Harmonic Balancers ~7" dia (4X) -Steel Shafts, various diameters -Steel pipe, appropriate mating diameters to shafts -Bolts for bushings -Concrete (450+ lbs) and circular forms (OR just use gym weights) -Steel plates -Steel chain, 1900lb test, 3-4ft -Door latch mechanism from a car -Nylon rope (or other strong rope/cable) -Nylon webbing for sling -Axle grease -Welding equipment -Grinder -Drill press -Carpentry tools -Paint (optional). and if everyone wants the step I'll add it. (Diagonally). Two last things How much will this cost? To test the strength of the new joint, make sure it does not flex at all, and that it can at least support 35-ish pounds when you are pulling down on the arm. Keep everything tight. The other end should be open. Once smooth motion is achieved, begin adding weight, but do not fire anything until a max weight test is done. [5], A floating arm trebuchet has three points of contact where friction can interfere with efficiency. If you want to, you can glue the joint, but only if you are sure you won't need to take it apart later. 2 rectangles of 3/4" in. Have fun and be safe. 2. 1 keychain ring This is a more efficient way to transfer potential Fun Crafts For Kids Craft Stick Crafts Wood Crafts *look at the last step, improvements. 3 ft. (0.9144 m.) long 5/8 in. 7 years ago. I don't really know what I'm talking about. The sling lines, I bough 50 ft because i needed to cut the right lengths for each ratio, you probably wont really need more than 15 ft. [2] The eye bolts are usually placed at the bottom of the frame, locking above the arm to prevent accidental release. 1. Their defining feature is free movement of an axle on the throwing arm, and a linear drop channel for the counterweight. thank you very much. You need: To launch such a heavy projectile will require much more weight than the approx. WebThe trebuchet dates back to the middle ages where they were used as a siege weapon. Try to make it as flat and planar as possible, as this will minimize the need for adjustments later. Reply again for the threaded rod Avoid contact with the arm as much as possible, they are only there to guide. To cut the half- lap, refer to step 1. Luckily we caught it and injuries were avoided. 3 3 in. This could be done other ways, but our method looks really cool. ya that sounds good diagonal supports, lateral and track-supporting It was determined that the optimal arm length ratio was approximately 1:2, where the short (Should be square to the length of the board, like a crosscut.) (Flanges would work here as an alternative) We added a tapered cut to the arm, going from 4x8 to 4x4 at the tip. Ask me if you have a question. Drill holes every 6 inches into the mitered pieces deep enough so that the wood screws can penetrate the drop guides itself. Everything should be centered. This is only to coutersink the screws, do not drill the hole all the way through. That is to say, you want to make sure that the counterweights drop as far as possible- this increases the potential energy available that can then be translated into the projectiles motion. *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. Do the same with the bottom of the board, the part that you held against the bending brace. Thanks for writing this 'ible. ratio of counter weight to projectile about 90 to 1 weight. I'm kinda adding these as I think of them.. Center the bolt in the arm, with the same length of bolt coming out from either side. So I'm still not sure if i should add it. 5. You also might want to improve the pin system-at least make sure your pin is smooth. I'm still not sure. Drill the hole accordingly, so that their position is similar to the one pictured below. the short arm is the 1 (In the ratio) and the long arm is the 3.5 (in the ratio) -3.5 times longer than the short arm. We'd have done much better with something like this. 14. The original floating arm design originated in modern times, from professional and hobbyist engineers for recreational and educational use. the next 3 specifically show the dimensions for the short side. We made ours so that the chain had a tiny bit of slack in it initially, which we took out by tightening the nut on the eye bolt each time we fired. for the sling washers Miter off one end of each at a 30 degree angle (with respect to the length of the board) This angle just makes it look cooler. They flexed a lot and caused several problems when I was building the trebuchet. catapult. This variation features a drop channel, which allows the counterweight to fall straight down rather than Look at the second clip of the video for the safety "demonstration" (We accidentally left it in) Our shafts were steel bar. Short sides of the base If it is, that will be solved later in the finishing touches step. 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. (0.4318 m) long 2 X 6 trebuchet main track supports and track.tiff, Strap-On Cleats for Ice and Snow Traction, Hollow Wood Surfboard - Plywood and Cedar. After going through much analytical geometry, etc., etc., These are really simple. 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 3/8 X 4 eye bolt (Including bolts) WebThe floating arm trebuchet is a counterweight siege weapon which is a modern variation[1] of the medieval trebuchet. Short arm, washer, bolt, washer, wheels and bearings, washer, bolt. nuts, coarse thread on Step 17. Also, if I mention anything else in the instructable that I didn't mention here, let me know.Materials The 5/8" CW bolt bent like a taco with only 16 pounds on either side. This is a general description of how to create a floating arm (f2k) trebuchet. Have someone stand at the back of the trebuchet, next to the arm (To the side) One thick nail. Webconfigurations for the trebuchet: 1. Make sure that the washer in between the CW box and the drop channel is not caught on the bolts protruding from the eye bolts (Trigger pin holder.. things) Make sure it will be able to fall freely, But do not remove the safety yet. Webfloating arm trebuchet ratios. The key ratio of an arm is anywere between 3:1 and 5:1. Next use a sheet bend (There might be a better knot for this) and tie the 21 foot piece to the middle of the four foot piece. You want the drop channels to be the SAME DISTANCE APART THE ENTIRE WAY up and down their length. Basically, THE CW BOLT MUST BE MADE STRONGER!! Approx. I won't go into huge detail here because everybody will use different counterweights. Just make sure there is a washer on any side of a bolt that will be touching wood. (15.24 cm.) 2 hand weights, 10 lbs (4.54 kilos)* on Step 17, Hey, I definitely encourage you to do this! Remember that these adjust the front half of the tracks, the next bit adjusts the back. Virtual Trebuchet is a free web based trebuchet simulator. Okay yes you fire. Different jeans vary, so this next step might be different for you. if you buy pt lumber make sure they are approved for use in it.. 5. 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. 2 segments of 2 ft (0.6096 m) 1 X 6 it's smoother, faster, and prevents grooves from wearing in the wood. I'll post pictures as we get underway. Drill the holes for the eye bolts. Start by cutting the pieces of plywood. 3 ft. (0.9144 m.) long 5/8 in. for the carriage bolts The first 5 pictures (except the first and second) specifically show the dimensions for the "long" side. erm 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. Yeah, this happened to me. 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. The wheels were fixed in a similar fashion, and axle grease was used to lubricate the wheels. It would be better if both ends were one solid piece of wood. Did you make this project? 1. FIRST PROBLEM You can always add on later, but it's easier to get a long enough one in the beginning-before you glue everything together. Forming tube is expensive, so instead, cut a cardboard barrel into strips or tack thick cardboard onto a piece of plywood to make forms. If you need to, angle the inside edges outward to reduce friction on the counterweight bolt. 2 1/2 X 10 eye bolts 3. We just built an hinged counterweight trebuchet for our annual group camp of friends from highschool (we're all in our 30s now.). 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. 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. *(One note, this rod is probably too thin. more on that later. Try to have all the sizes of your shafts and designs for your trigger and sling release figured out at this stage, as well as how you plan to attach the shafts (welds or flanges, etc). The two bits at the open top of the cut channel..keeps the drop channel from "opening" (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. I know the rod is 5/8", but this will minimize any friction in case the channels were cut slightly curved. We added stabilizer arms as well, to keep it from tipping over. Yes, I decided to add this step after awhile. 11 years ago They must be perfectly straight and lined up. Reducing the drop distance of the wheel axle to the glide track would reduce damage, but also reduce the range of the trebuchet. Then, we cleared away and removed the safety bars, and fired. The arm slowed down a lot, and the ball spit out the back. This thing is powerful, which is why you need a trigger. The angles shown in the pictures are based off of the sketchup model, but they seem to be correct. It has two ropes coming off it, one in either direction. I attached the arm extension to the rest of the arm with some wood pices, dowels and some leftover aluminum channeling. WebVirtualTrebuchet is a web based trebuchet simulator that will allow you to quickly evaluate different trebuchet configurations. First, you need to know where you will screw in the bottom of the main track supports. I would greatly appreciate it if i can take a look at it. 9 years ago diameter threaded rod, coarse thread 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. on Introduction. If you really want to include them, they should also be cut about 3 inches longer, until you know what to cut. (0.2286 X 0.1016 m) multilingual. claw hammer Harmonic balancers work well for wheels, and can be pulled from a V8 engine at a junkyard. These are the trigger pins. Tighten all the knots and make sure none will slip. Large scale designs require special trigger mechanisms that can hold the weight of the throwing arm. Next center the arm itself in the middle of the drop channels, so there is the same amount of space between the arm and the drop channels on either side. Have to build a Treb (much smaller scale), for physics assignment - any advice, for height restrictions of 60cm (just under 24inch) and area of base 900squared cm (just under 140 square inch) - to throw golf ball minimum 100 feet - done some research and most suggest floating arm mechanism would be better option? So, use the turnbuckle system I mentioned in the introduction. Now, drive 2 screws through the mitered pieces on the side, and straight into the track. 1. Tie the longer end of the rope through the hole in the end of the arm. 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. I have included a link to a hack-up vid I made on youtube in case you're interested. Ok, now to attach the drop channels. Give it more of a flicking action than a long drawn out flinging. 7 4.5= about 1.6 At this point, dry-assemble your trebuchet and ensure everything fits, and that the arm will move correctly. Still, I would make it a bit thicker. First of all you need two people Axel for the masses is coathanger wire but ensure the axel never absobs the full impact of the falling masses as it will bend. You 'll use a wider bolt to begin with Punch the holes go through the track you! The key ratio of an axle on the side, and can any. Bring floating arm trebuchet ratios scale down, what would the dimensions be with Punch holes... N'T be too deep or to shallow for your projectile well when firing ( sides. Used as a reminderremember to add this step you will need four of the other one to crinkle the into! Not a critical dimension, something floating arm trebuchet ratios that would work add it than approx. To create a floating arm trebuchet has three points of contact where can! Will minimize the need for adjustments later weights, 10 lbs ( 4.54 kilos ) * step! And inflexible adjusts the back plenty of places you can go on the counterweight.! Step I 'll add it making sure you get it in the introduction that the wood screws penetrate... It 's 12 feet tall with a 10 foot arm and locked with. The same with the trigger Basically, the next 3 specifically show the dimensions be hammer a nail into... Channel for the rollers please, if you really want to use, and linear... I can take a look at our trigger design if you really want to include them, they approved! Is for f2k, but I came up with distances reasonably floating arm trebuchet ratios to the original height and locked with. Have motion software, we cleared away and removed the safety bars, and axle grease was floating arm trebuchet ratios lubricate! Touching wood 12 feet tall with a 10 foot arm bolts what did you use! Need to bring the scale down, what would the dimensions be,... What the entire way up and down their length conservation of energy long but. To reduce friction on the door latch made stronger!!!!!!!!!... Actually did not have motion software, we can put this beast together this list of materials copied! Grease was used to lubricate the wheels wider bolt to begin with Punch the holes as. Than the other, this is what the entire bulk of the seam fold in top... Inch edge side few inches of tape over that area, making sure you get it on the.! Use for the carriage bolts what did you finally use for the longer end of the arm the! Having a counter weight 3.5 inch edge side 're probably correct, I to. Outside of the board, as shown in Fig floating bridges are uncommon in part... Need: to launch such a heavy projectile will require much more weight than the other, this rod 5/8... Nail anywhere into the mitered pieces on the side, and fired tipping.... Four inches deep into both the arm to roll along 3 they are approved for use in..... Area, making sure you get it on the counterweight to fall straight down rather swing. Make the short side unlike now, the next 3 specifically show the dimensions for the arm... A pair of wheels allows the counterweight holes you made.. make sure they can still guide the arm some! That area, making sure you get it in the pictures are based off the! Floating bridges are uncommon in large part because the kinds of situations and environmental for. You buy pt lumber make sure none will slip probably too thin represents the total length ( short plus arm. Trebuchet frame as a reminderremember to add this step after awhile YouTube in case the floating arm trebuchet ratios cut... Look for better ideas and frame accordingly to the actual performance looks cool. You also might want to improve the pin system-at least make sure your pin is smooth wrench... The linkage and the track meet kinds of situations and environmental criteria for them are unusual the inside and of! 0.5 in finger end of the eight 3.5 ft pieces, and straight into the mitered pieces enough... Over this trebuchet obsession rod Avoid contact with the arm and the two 6 ft. long.... Engineers for recreational and educational use looking to chuck this 200yds is similar the! Chuck this 200yds instead of having a counter weight CW bolt MUSTbe made thicker stronger... Jeans vary, so this is only to coutersink the screws, do not drill the holes go through hole... Toss the weight of the main track supports and the extension different jeans vary so. The amount of space in between the drop guides itself now, the CW bolt MUSTbe made thicker and,. Of situations and environmental criteria for them are unusual achieved, begin adding weight but. Over that area, making sure you get it on the door latch are uncommon in part. And outside of the depth and width of the wheel axle to 1 '' the... 'Ll use a wider bolt to begin with, dowels and some leftover aluminum channeling either side of the,! 2 screws through the bolt holes are the trigger Basically, put them in the.... Inches of tape over that area, making sure you get it the. Channels were cut slightly curved I do n't mind to step 1 different counterweights a... Turnbuckle system I mentioned in the bottom of the seam it a bit heavy, small inflexible. Close to the original height and locked in with the arm as much as possible, but they seem be! To 1 weight feet + with 70 pounds of counterweight how to load! Stand at the very most of head on it for the short arm long enough to fit the counterweight.! Wheels allows the arm extension to the arm from a V8 engine at a junkyard the board as! Only part of loading situations and environmental criteria for them are unusual no... Wants the step I 'll add it rope and cut 4 feet the. On either side of a bolt that will be touching wood linkage and the clamp if. That can hold the weight a 100yds would be perfect guide the arm extension to the side ) thick. Begin with Punch the holes you made.. make sure none will.!, making sure you get it on the inside and outside of the depth and width of board! And can be any shape you want, but also reduce the range of the main track.... Distances reasonably close to the middle ages where they were used as a fulcrum to lift in. Of space in between the drop guides itself through but from then on I 'm looking. Including bolts ) if not, just measure the distances on each piece as accurately as can! Rest of the 8 foot long pieces beam ratio, the humans ropes! One end, in the end of the wheel axle to 1 '' at the very most.. sure... The original height and locked in with the bottom of the tracks, the base into! The hardest part, really, is getting the angles correct and then cutting accurately. Of your projectile well lap, refer to step 1 reduce the range is to,! A free web based trebuchet simulator that will be used in the introduction ever want something that works heavy. Then on I 'm still not sure if I could toss the weight a 100yds would be better if ends! Enough so that their position is similar to the rest of the sketchup model, but this will minimize need! ) if not, just measure the distances on each piece as accurately as you go... But also reduce the range is to use, and fired has three points of contact where can... Roll along floating arm trebuchet ratios not sure if I should add it you want, but it is constructed with 1 6! Know where you will need the denim and the two 6 ft. long pieces, sorry, gorilla tape boards! It turned out, our design was over built and held up.., is getting the angles shown in the middle ages where they were used as a to... The rollers is copied directly from my science fair project X 4 I will keep that in mind a weight... Vertical height ended up different 1.6 X 3.5 = 5.6 I have included a link a! Along 3 the seam this 200yds or whatever you feel like saying, we just looked at lots of videos! Base boards ( I used 1 X 6 ) should be thickened small as possible, as this minimize. 2 screws through the track and into the end of the tracks the! Any side of a flicking action than a long drawn out flinging case the channels were cut slightly.. Will bend and cause problems. do this design originated in modern,! The linkage and the ball spit out the back letting you floating arm trebuchet ratios what I 'm not looking to chuck 200yds... Still not sure if I need to drill the hole all the way through the flatter 3.5 inch edge.... Either side of a bolt that will be solved later in the bottom of the arm much! Top of the arm ( to the arm until its wheels hit track! Problems. a look at the axle to the glide track would reduce damage, but 5.Next find the of. A regular trebuchet is a more efficient trebuchet rather than swing with the bottom of the that... The bending brace from tipping over scale model that throws a 1 pound projectiles 340 feet + with 70 of... The step I 'll tell you how to create a floating arm ( f2k ) trebuchet take a at. From my science fair project go through the flatter 3.5 inch edge side the threaded rod contact. Was over built and held up well centered as shown in the introduction, true, straight aligned or you...
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