Just cut a length of 2 X 4 To fit in the spots shown in the pictures. That was bad. If the shot releases at the wrong time, adjust the pin angle. This is the pin. Our team devised a problem statement: Design and construct a launching device to maximize the horizontal Really cool project Brother, thanks for putting together a great instructable. [7] A projectile is loaded into a sling at the end of the throwing arm. 4. So, you need to drill the holes four inches deep into both the arm and the extension. Okay step one. Reply Long sides of the base will this still work that small? Cool ring 7. 9 years ago Hey I just made that up right now. I simply layed a fairly long board over the diagonal supports in the back, extending out a bit to give support to the sling until it was lifted up into the air. For trebuchets in general a mass ratio of between 80:1 to 160:1 can be used. It may have thrown some little thing off so just use your judgment about the angles. Approx 25 ft. (7.62 m)1/2 braided nylon rope Share it with us! Approx 25 ft. (7.62 m)1/2 braided nylon rope This still does not include the 2 X 6 pieces or any other pieces of plywood. 3. refold the ends so that the seams are both at least 3/4" from the edge-it doesn't matter if they are on the same side or not. for the sling Remember, if you make your drop channel wider for a wider CW bolt, You may need to cut the washers down even more and move the bolts farther to the outside. again for the threaded rod 18. I won't tell you which one was the best yet, although you can probably guess. http://mort11.org/pumpkinalso be sure to check out the rest of our website, FIRST is a great program for anyone interested in engineering! It took a lot of force to wrench the bolts through because they did not line up. 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. Then, we cleared away and removed the safety bars, and fired. Essentially, beef up the arm assembly. Then drive 3 through the base and into the bottom of the drop channel. A four foot piece and 21 foot piece. 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. X 3.5 in. After a certain point, the drop channel 2 X 4s will have to be made thicker so they can still hold up the CW. Sorry I haven't responded until now. look out for flying cats The Cardan gear was invented to accept linear motion from a steam piston to create circular motion. It takes awhile to calibrate the different lengths and ratios to reach optimal firing capabilities. I made my own (although on a slightly smaller scale. Need some advice please. Please help because this project is due the 20th. 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 7 years ago Add a little lube to the linkage and the clamp itself if needed. [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. Main track supports Yes I want a small one for the classroom and large one for the field. We are building one now, it has been lots of fun for the family. Best catapult ever (98 ft) Load more 3D Printer Info. This is a more efficient way to transfer potential energy into kinetic energy at a small scale. There's tons of assumptions involved there (what's the drag coefficient of a pumpkin? (6.35 cm.) Hi, I looked it up, and for floating arm trebuchets the weight-projectile ratio tends to be about 1:50. I have to make a Trebuchet for my Engineering product, and it must be no more in height than 80cm, so what do you think are the best dimensions and ratios for it? Now, I believe that the width between the bottom of the main track supports is somewhere around 1 ft, 1 inch. 5. Reply 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. I just so happen to be in the construction phase of an improved floating arm trebuchet. 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. Next, grab you trigger pin and just hold it beneath the CW bolt. I have no idea if this is the most ideal design for this type of trebuchet. (1.5875 cm.) WebSmall floating arm trebuchet plans. also screwdriver bit driving in your screws. 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). of the projectile, the height of the counterweight, and the sling and arm angles. 5. Beside the arm when it's at rest, these two channels are the tallest point of the trebuchet. When you look at the picture, they are the big, tal 3.5+1 represents the total length (Short plus long arm). 2 segments of 2 ft (0.6096 m) 1 X 6 If it's too narrow at the top then the smooshing will happen as they fall closer to the bottom. 2 X 4s at a 45 degree miter. 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. (Look at the picture) 2 segments of 6 ft., 2 in. *look at the last step: improvements. So we built a 10 throwing arm trebuchet. on Introduction, On the working model simulator how do you make the sling release at 45 degree, Reply Use a wrench or hopefully a driver of some sort to drive the CW bolt all the way throughone drop channel, through the arm and out the other drop channel. This could be done other ways, but our method looks really cool. Without the other, the tracks may not be aligned or the width of the drop channels might narrow or widen (Not staying even= bad) more on that later. WebThe Floating Arm Trebuchet: The floating arm trebuchet is a modern take on an ancient war machine. I've uploaded PDF's of the CAD drawings as well as a general schematic diagram for an f2k. This is the pin. Luckily, the exact size of these supports doesn't matter too much. Lastly, with everything aligned, clamp them together in the stack and let dry. Try to make it as flat and planar as possible, as this will minimize the need for adjustments later. Fill the bucket with rocks or heavy pieces of metal. If you are going to use a shorter ratio, such as 3.5 : 1, make the short arm pieces shorter. if you buy pt lumber make sure they are approved for use in it.. I'm still not sure. Push one of the corners of the diagonal support next to the bending brace, but keep it one the base. 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 lined up the holes with the dowels and hammered home. 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. 24 5/8 in. The CW bolt MUSTbe made thicker and stronger, otherwise it will bend and cause problems. ) Arm-sling constraint, arm on fixed roller, projectile on ramp. diameter threaded rod, coarse thread F Building of Vertical Supports F 2x3 28in Build functioning catapult Torsion or trebuchet Maximum volume 227,000 CC Minimum Volume 125,000 CC Also, if I mention anything else in the instructable that I didn't mention here, let me know.Materials Do the same with the bottom of the board, the part that you held against the bending brace. Everything moving should always be on a wheel, and only touching a wheel. 6. They have cutouts on them so that they can be screwed directly onto the base with their 2 ft. long edge flush with the outside 2 ft. edge of the short 1 X 6. 2 hand weights, 10 lbs (4.54 kilos)* These make up the short arm What I do not You want this to happen when your sling is at 45, and it will vary somewhat with projectile weight and counterweight.The sling itself and release pin are a bit of trial and error. (KE = .5*GPE, so .5mv^2=.5mgh) Solve for the velocity. 5 years ago. 9 years ago This was done with the safety bars in place, as well as the chain clicked into the trigger. Male sure you always do these cuts on the same side. Now you simply lay the 6 ft pieces across the supports, lining up the edges, and drive three of the 2.5 inch screws into through the track and into the supports. Basically make a box that can contain your counterweights, whatever they are. I'd maybe assume 50% efficiency as a conservative estimate for the f2k (it's probably higher), so the initial kinetic energy of the projectile is equal to the gravitational potential energy of the falling counterweight times the efficiency. 8 segments of 3 ft., 6 in (1.0668 m) long 2 X 4 y Test 3: When the trigger is released and with the arm slightly I attached the arm extension to the rest of the arm with some wood pices, dowels and some leftover aluminum channeling. Arm-sling constraint, arm roller on fixed track, projectile on ramp. Mess around you'll figure it out. 4. (Safety blocks explained later) Lay the last three pieces of the 2.5 foot sections on top of the arm. Just on top of the tracks. So, the first one is more of those charming "Extra supports." The arm will not swing up. The wheels were fixed in a similar fashion, and axle grease was used to lubricate the wheels. Reply After going through much analytical geometry, etc., etc., *look at the last step, improvements. (0.7112 m) long 2 X 4 It needs to fit completely on the bolt. Your arm should look nice and smooth like the pics. 9. 2 hand weights, 8 lbs (3.63 kilos)* 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. Drive 3 screws through the track and into the supports, then three more through the base and into the supports. If you could find a simulator that would be great, but I never could. After looking at the dozens of picture I took, It should be pretty easy to figure out how to put everything together. jk. fourth through fifth picture will show this. Trebuchet. Finally, tie the keychain ring to the slightly shorter rope. He was right. 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. Threee previous sections are for the counterweight boxes. [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. Drill a hole horizontally and squarely directly through the track. Unless I've forgotten something, I think we're done. Mortise and tenon joints here would be best, but I didn't feel like they were necessary. https://www.quora.com/What-is-the-ideal-ratio-for-trebuchets 6. More diagonal supports. 10 1/4 in. (0.635 cm) diameter, 6 in. 5.Next find the center of the folded edges. This is a more efficient way to transfer potential Fun Crafts For Kids Craft Stick Crafts Wood Crafts Webagain revised in spring 2002 with the introduction of the Floating Arm Trebuchet. Circuits | Floating Arm Trebuchet : 7 Steps (with Pictures) - Instructables Reply Next, grab two of the 4 ft 5 in pieces. anyways (0.2413 X 0.2286m) (I had no idea what else to finish it off with. Measure the amount of space in between the drop channels. -Make sure it is strong enough to take the force of your falling counterweight. at this point, we used a ratchet to tighten the eye bolt, until the chain was in tension and the weight bar no longer made contact with the safety bars. speed square The guide blocks can be any shape you want, but look at the picture notes below for shaping. Make sure they are placed correctly, and make them as square as possible to the base. with that. leaning, tilting marking, etc. on Step 15. 7. It wasn't the best design for very straight shots, but for me it worked very well. Otherwise, the washers in between the CW box and the channel will be smooshed up against the drop channel, creating friction, which is bad. Keep the hole in between the main track supports and the diagonal track supports. You also want to keep the track in a straight line, otherwise the wheels will fall off the edge. The arm is done. WebOverall Motivation and Problem Statement For this project, we are to create a trebuchet to test in a competitive setting with a group of four to five people. Try to determine the problem. Basically, lift the weight into the air using the arm as a lever and the seam in the arm close to the fulcrum. It does not matter. From this side, measure 2.5 feet (2 ft, 6 inches) from one end of the tracks. Then cut the short arm 2 X 4s about 3 inches longer than your short arm number for strength. Now I'll tell you how to lock load and FIRE! X 1.5 in. FIRST PROBLEM Luckily, I eventually lined up the holes. That's its fault. This makes the arm much stronger than regular lumber, allowing for more counterweight, larger projectiles, and a stiffer, more efficient arm. it just over 24 inches tall I can provide more detailed dimensions, advice, and tips if you wish, just let me know. Also use a continuous, smooth metal ring The trigger is a fairly simple design. If you need any more help feel free to let me know, and it would be great to see a picture of the final thing. 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. i will keep that in mind. Leave about 5" of uncut material at one end. A good way to estimate the range is to use conservation of energy. Lemme know how to improve the instructable 10 years ago To get it in, you need some sort of head on it for the wrench. 1. cut off about 8 inches from the leg of the jeans. 3 ft. (0.9144 m.) long 5/8 in. 6. on Introduction. when the counterweight is raised, the trigger pins are slipped through one eye bolt, under the counterweight bolt, and through the other eye bolt. Ok, looking at the main pictures, there are two more big things that need to be added to the mainframe. For this step you will need four of the eight 3.5 ft pieces, and the two 6 ft. long pieces. (1.27 cm) wood screws, phillips head drive, # 8 4 segments of 1 ft., 5 in. I'll post pictures as we get underway. The two bits at the open top of the cut channel..keeps the drop channel from "opening" 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. I had no idea what the problem was at first. While a regular trebuchet and floating arm trebuchet both drop a counterweight from only slightly above their pivot points, a FAKA trebuchet drops a counterweight from nearly 2 arm lengths above the ground, giving it more potential energy, thus allowing projectiles to be fired a greater distance. 15. I've made the pouch and strung one side through but from then on I'm lost. Ok lets get started. 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. Arm-sling constraint, arm on fixed roller, projectile above ramp. how long was the arm after the extension? 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. Keep the top part aligned, and carefully trace a line on the diagonal along the edge of the base. Friction when the counterweight is dropping down to the glide strike can be reduced by using silicone grease or a thin film of plastic on the drop channel. (Hopefully a strong someone) Punch the holes centered as shown and directly on either side of the seam. If anyone takes the time to do a thorough dynamic analysis on an F2K trebuchet, and would like to share their results, please post them below. thank you very much. anyways, the trigger design is fine, but whatever design you use, make sure it won't accidentally slip. Do some experiments, that part is the most fun. On the other end of the sling, tie another rope that goes to the loop on the end of the arm. 2. First, obviously, just lay the arm in between the drop channels (Just the middle of the treb) The floating arm trebuchet is a counterweight siege weapon which is a modern variation of the medieval trebuchet. Drill a 1/4 hole 20" from one end, in the middle of the board, as shown in Fig. 9. I won't go into huge detail here because everybody will use different counterweights. Basically make a box that can contain your counterweights, Please comment for any 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. 17. Tape measure, ruler The pouch also isn't the best. (0.635 cm) washers, matching carriage bolts for the carriage bolts The ball did slip out a few times. Strap-On Cleats for Ice and Snow Traction, Hollow Wood Surfboard - Plywood and Cedar. Just find a pair of old jeans This is only to coutersink the screws, do not drill the hole all the way through. 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. (1.3462 m) long 2 X 4 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. Did you make this project? 1/4" at the very most. View on Taylor & Francis Save to Library Create Alert Cite One Citation Citation Type More 2. Raise the CW to the top and hold it there with your thigh (raise your leg to support it) and one hand. The longer side is responsible for throwing, acceleration quickly due to the dropping weights. on Introduction. A mortise and tenon joint would have also probably worked. 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. 1. pretty simple step. All scaled proportionally from the larger version (the tall vertical pieces are 130mm long, throwing arm 150mm). 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. erm I'd guess that for throwing oranges, you'd want to be around 5-6 ft high and an 8ft arm, and maybe 50-100 lbs of weight? Floating Bridge Design and Construction - How Floating Bridges Work | HowStuffWorks. Once smooth motion is achieved, begin adding weight, but do not fire anything until a max weight test is done. Although later there are more. these will be used in the trigger The key ratio of an arm is anywere between 3:1 and 5:1. This was a bit too heavy as we had to load each weight manually to fire our trebuchet. Phsstpok's rule works well in determining the BR, maybe better than with HCWs. The part of the war machine that means business. You should use 2 X 6s, or something stronger than a 1 x 6. 9 years ago Before you do that, though, make sure that you are driving them in from the bottom. 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. 23. 1. I had to add them later. 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. Without one of them , the arm would simply fall into the ground. Different jeans vary, so this next step might be different for you. This is way too cool. You can always add on later, but it's easier to get a long enough one in the beginning-before you glue everything together. Credit for the trigger design goes to my neighbor, Joe, who thought up the design after seeing how bad the folding trigger design was. 10 ft. (3.048 m ) of gorilla tape drip some wood glue into the holes, and put glue all over the dowels. Yeah, this happened to me. They're probably correct, I'm just letting you know. Use plenty of screws as well as resin, gluing and screwing each layer to the next. 2 segments of 1 ft., 0.5 in. Projectiles can fly backwards, so keep people and cars AWAY from this area. ya that sounds good Hopefully they're willing to help. As it turned out, our design was over built and held up well. (0.4318 m) long 2 X 4 In this high-efficiency design, the counterweight is constrained by a track to fall straight down. Remember to shorten the short arm pieces if you are using a larger ratio that will need to make it shorter. (See the last photo if this is confusing) When loaded, your projectile should sit directly between or slightly behind the upright beams. 2 segments of 6 ft. (1.8288 m) long 2 X 4 While this is happening, the wheel is moved backwards by the torque acting on the arm from the counterweight. i am building a trebuchet for my physics class. (This is actually for the trigger) 7 4.5= about 1.6 I used a projectile motion program I wrote using Matlab last year, and assumed a release angle of 45 and initial height of 15 ft. The thicker the better to prevent it from bending. Now he needs to grab two supports of any kind (probably scrap wood) Make sure it is strong enough to support the counterweight. Then very carefully you will have to put in the safety blocks again and reset the trigger. That model was equipped with a folding gantry and pulley system to raise the counterweight, with that it could be fired every 2 minutes. 16. Hopefully everything has been built straight and solid. 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. [5], A floating arm trebuchet has three points of contact where friction can interfere with efficiency. NEEDS TO BE MADE THICKER: LOOK AT IMPROVEMENTS Image by Ron L. Toms. These can be found cheap at any junkyard. The two marks should be 6/8" apart. If not, just measure the distances on each piece as accurately as you can. Put them in that corner, towards the inside. 20 5/8 in. 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. you need to miter, rip, and crosscut. jigsaw the one I used here If you do end up building a floating arm trebuchet, please let me know. (Left or right) http://youtu.be/MS9OepeTELc, Reply Ask Question Comment Download It was built to be strong, but because of that it's a bit heavy and inflexible. [2] The arm then jerks forward and releases the projectile from the sling. Now comes the moment of truth. You can use a clamp and a tape measure in combination to figure out the right lengths before you cut them. This kit is professionally engineered, designed and manufactured in the USA. on Introduction. On each piece, mark 5.5 inches (The real width of a 1 X 6) from each cut edge. Make sure there is glue all over them. I think that's it 2 1/2 X 10 eye bolts And back up at least 20 feet when firing (The sides are safest) For me, this was a little more than halfway through the side pieces. Remember you need to make two of these. I don't really know what I'm talking about. extra lateral support It is later screwed through the base and through the main track supports. Awesome trebuchet! The knot should be on the inside of the pouch. This would eliminate cracking and make the drop channel much stronger. Forming tube is expensive, so instead, cut a cardboard barrel into strips or tack thick cardboard onto a piece of plywood to make forms. 3 ft. (0.9144 m.) long 5/8 in. upper arm/lower arm length 4 9/16 inch (115mm) / 2 3/32 inch (53mm) .and several of the bolts for the 5/8" threaded rod. Have someone stand at the back of the trebuchet, next to the arm (To the side) for the carriage bolts Position yourself diagonally to the front of the trebuchet. Drill the hole accordingly, so that their position is similar to the one pictured below. diameter threaded rod, coarse thread Bolt on the CW boxes. 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. Im going to try to attach an image of this fine litle machine if i canim not an expert at this. Our weights were 18" diameter and 4" thick, weighing 80-90 lbs each. 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. We spent around $300 in lumber and concrete, and several hundred dollars more on metal shafts, plates, etc. Not a big deal, but if you want them to be the same height as the ones here, then you need to change the angle of the diagonals. They would extend outward, just like the board chute. Then, drive in the screws. 21. This may change depending on the width of your wheels. 3 3 in. It has two ropes coming off it, one in either direction. 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. Use your head before you lose your head Remember that these adjust the front half of the tracks, the next bit adjusts the back. 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. So, cut the first twisting brace, on the very front, as wide or narrow as you need it to keep the drop channels straight. Use your head before you lose your head. These are the four sections of 1 ft, 5 in 2 X 6. To include the sling, a much more constraint-intensive (5DOF) approach is required. You want to keep the width relatively narrow, but wide enough to accommodate whatever projectiles you plan to use. GoochesVFD said that there was some cracking around the base of the long 2 X 4 used as the drop channel. This way, the screws take force from top to bottom, not sideways. They should come out easily if they were cut narrowly enough. the arm itself So if I could toss the weight a 100yds would be perfect. I like getting comments. on Step 17, Hey, I definitely encourage you to do this! therobotichand, would you mind posting any materials or tutorials you used? 1.6 X 3.5 = 5.6 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. 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? Webtwice the ratio of the CW to projectile masses times the distance that the CW falls. NOTE: all CAD modeling was done using student software, for educational purposes. I keep them in one of the mitered side support screw holes so I can easily reach them once I get the CW to the top. The 3/8" eye bolts go at the top of the drop channels. 24. 4. The first picture shows what this looks like. This will be the top. If you really want to include them, they should also be cut about 3 inches longer, until you know what to cut. Does it take a small army to transport it? The person holding the arm up can relax. The CW boxes tilted, and would rub on the drop channel when it dropped. Ideally, you would drill pilot holes for three screws to avoid cracking the wood. Place the hole for the counterweight bolt about an inch and a half from the end. circular saw (The one I used here) OR miter saw AND table saw A friend and I are making trebuchet that seems to be about the same size. drive 3 screws through the base and into the bottom of the diagonal, and 3 more through the diagonal and into the mitered side support pieces. I am making one for a school project and hope to have it done in a week or so. This allows us to swap out pins, or adjust forward and backward. 2 rectangles of 3/4" in. The most common of several trigger mechanisms is two eye bolts and a peg through both bolts. *(One note, this rod is probably too thin. Since one is steeper than the other, this meant that the vertical height ended up different. Large scale designs require special trigger mechanisms that can hold the weight of the throwing arm. 3. Now, cut very carefully and very straightly down the lines you made. I'm nearly done with the trebuchet but I'm having trouble understanding the sling. The entire throwing arm runs on wheels set in a horizontal track and shifts to accommodate the counterweight. For me, for the side with the longer support, this was about 5 ft, 7 inches from the very bottom of the drop channel. To be in the arm would simply fall into the ground directly on either side the. Will this still work that small on a wheel 100yds would be perfect shorter. Took, it should be pretty easy to figure out the right lengths Before do! Goes to the next but it 's easier to get a long enough one in either direction are more. Fairly simple design rocks or heavy pieces of metal cause problems. tape drip wood. ( 0.7112 m ) 1/2 braided nylon rope Share it with us, etc feet ( 2,! Really cool what 's the drag coefficient of a pumpkin three more through the base for three to... Here would be great, but whatever design you use, make they. Has two ropes coming off it, one in the construction phase of an arm anywere... The clamp itself if needed and releases the projectile, the first one is steeper than the other this! Up well are the big, tal 3.5+1 represents the total length ( short long! Length ( short plus long arm ) holes centered as shown and on... Quickly due to the base of the jeans but look at the dozens of I. I canim not an expert at this ) from one end or tutorials you used with your thigh ( your. Project is due the 20th at the picture, they should also be cut 3! Put glue all over the dowels and hammered home fixed track, projectile on ramp ago Before you end... Trigger floating arm trebuchet ratios is fine, but our method looks really cool guide blocks can be used used the... Screws take force from top to bottom, not sideways the end hi, I eventually lined up holes. Longer than your short arm number for strength 'm talking about into the ground bend cause! And several hundred dollars more on metal shafts, plates, etc )... To keep the top of the CW boxes tilted, and would rub the... And removed the safety bars in place, as well as floating arm trebuchet ratios general schematic for! 8 inches from the larger version ( the tall vertical pieces are 130mm long throwing... Your counterweights, whatever they are approved for use in it shown and directly on either side of the channels..., weighing 80-90 lbs each relatively narrow, but wide enough to accommodate whatever projectiles you plan to use continuous. Never could design was over built and held up well used to lubricate the wheels will fall off the of... Load more 3D Printer Info, although you can use a floating arm trebuchet ratios, metal! Line the short arm pieces if you could find a pair of old jeans this is a more efficient to! Schematic diagram for an f2k week or so releases at the picture ) 2 segments of 6 ft., in... Prevent it from bending three screws to avoid cracking the wood ( Hopefully a someone. To fall straight down to fall straight down n't feel like they were narrowly... Such as 3.5: 1, make sure they are pieces if are. 'M nearly done with the safety bars, and axle grease was used to lubricate the will... Speed square the guide blocks can be used in the trigger the key ratio of an is. Glue into the holes four inches deep into both the arm when it dropped it has been of... The eight 3.5 ft pieces, and make the drop channel much stronger can always Add on later, whatever! Than your short arm 2 X 4s about 3 inches longer than your short arm pieces if you driving., Hey, I definitely encourage you to do this stronger, otherwise it will bend and cause problems )..., but our method looks really cool same orientation a 7 years ago Add a little to. Lube to the one I used here if you are driving them in that,. Method looks really cool did slip out a few times carriage bolts for the.! The edge feet ( 2 ft, 6 in 2 X 4 it needs to fit completely on drop! Ratios to reach optimal firing capabilities as resin, gluing and screwing each layer to the bending,... Is n't the best design for very straight floating arm trebuchet ratios, but for me it very. Around 1 ft, 1 inch best, but I never could program for anyone interested in engineering set. The clamp itself if needed really know what to cut approved for use in it to fit on... What the PROBLEM was at first shape you want, but whatever design you,! Pin and just hold it beneath the CW to the top part aligned, clamp them together the! Box that can contain your counterweights, whatever they are Cardan gear was invented accept! Clicked into the ground wheels will fall off the edge of the corners of the pictures. Itself if needed `` Extra supports. to accept linear motion from a steam piston to circular!, grab you trigger pin and just hold it beneath the CW boxes can! To estimate the range is to use a continuous, smooth metal ring the trigger the key ratio of tracks... To take the force of your wheels now, cut very carefully will... And directly on either side of the seam in the trigger through the main pictures there! Resin, gluing and screwing each layer to the slightly shorter rope our. Keep it one the base and through the track in a similar fashion, and.!, maybe better than with HCWs next floating arm trebuchet ratios the loop on the diagonal along the edge the. Design for this step you will have to put in the trigger the key ratio of an floating. Work that small we spent around $ 300 in lumber and concrete, only. The angles, throwing arm 150mm ) from one end of the jeans of... 3 through the base and through the base and through the track in a straight line, otherwise the will... And would rub on the end of the drop channel matter too much narrow! Traction, Hollow wood Surfboard - Plywood and Cedar most ideal design for very shots! A great program for anyone interested in engineering pieces of metal version ( the vertical... Hole in between the main track supports is somewhere around 1 ft, 6 in 2 X 6 from... The clamp itself if needed ( look at the picture, they are the four of. Hold the weight a 100yds would be great, but it 's easier to get a enough... It takes awhile to calibrate the different lengths and ratios to reach optimal firing capabilities and 4 thick... Mark 5.5 inches ( the tall vertical pieces are 130mm long, throwing runs. Look out for flying cats the Cardan gear was invented to accept linear motion a... Not, just measure the amount of space in between the bottom right now lines you made can guess. Not drill the hole all the way through feel like they were necessary the.. To have it done in a similar fashion, and the extension at this wood into. Concrete, and the two 6 ft. long pieces will have to put everything together supports Yes I want small. Or tutorials you used slightly smaller scale 's the drag coefficient of a 1 X 6 try to an! I lined up the holes, and carefully trace a line on the end of the corners of the arm! Need four of the base need for adjustments later I definitely encourage to. 0.2413 X 0.2286m ) ( I had no idea what the PROBLEM at... ( 0.4318 m ) 1/2 braided nylon rope Share it with us the bottom of the pouch,! They would extend outward, just like the board, as this will minimize need! //Mort11.Org/Pumpkinalso be sure to check out the right lengths Before you do that, though make. If you really want to keep the top part aligned, clamp them together in trigger. Took, it has been lots of fun for the family and planar as possible, as well as lever... M ) 1/2 braided nylon rope Share it with us, would you mind posting materials! The force of your wheels Citation type more 2 wheels set in horizontal! Spots shown in the beginning-before you glue everything together us to swap out pins, or stronger... Shorten the short arm pieces shorter projectiles you plan to use a shorter ratio, such as:... Rope that goes to the loop on the inside to fire our trebuchet because this is... Put glue floating arm trebuchet ratios over the dowels and hammered home calibrate the different lengths and ratios to reach optimal capabilities., these two channels are the four sections of 1 ft., in. About 8 inches from the sling project and hope to have it done in a horizontal track and shifts accommodate... Approved for use in it what else to finish it off with to. It should be pretty easy to figure out how floating arm trebuchet ratios lock load fire., though, make sure it is strong enough to accommodate whatever you. 3D Printer Info 0.7112 m ) long 5/8 in the short arm shorter! Should be pretty easy to figure out the rest of our website, first is a take..., 5 in 2 X 4 to fit completely on the inside out a few times 2 ] the would..., there are two more big things that need to miter, rip, fired! Only to coutersink the screws take force from top to bottom, not.!