these are the trigger pins Now, I believe that the width between the bottom of the main track supports is somewhere around 1 ft, 1 inch. This was a bit too heavy as we had to load each weight manually to fire our trebuchet. So, the first one is more of those charming "Extra supports." Still, it was strong enough with all the gorilla tape. The CW boxes tilted, and would rub on the drop channel when it dropped. catapult. Masses are lead (6x125g) cast from lead roof flashing. Again, use a bowline knot. When you look at the picture, they are the big, tall, straight pieces. diagonal supports, lateral and track-supporting Basically, put them in the corner where the main track supports and the track meet. ratio of counter weight to projectile about 90 to 1 weight. 2 segments of 2 ft (0.6096 m) 1 X 6 wood screws, phillips head drive, #8 Their defining feature is free movement of an axle on the 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. This is essential for an efficient machine. Awesome! Really cool project Brother, thanks for putting together a great instructable. 8 .5 in. Thanks for the great instructable! The straight track drop is an idea used in a FAT (Floating Arm Trebuchet), or in our Baby ASOK (Arm Slides Over Cam). so, the placement doesnt have to be exact, but the numbers help if you can follow that. Lemme know how to improve the instructable This will stop fraying and make it more solid. NOW AND ONLY NOW take out the safety blocks. 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. 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. I think that's it Then, using the claw hammer, hammer out these slivers of wood. I've always wanted one did you ever build a smaller one to start with? i just copied that This still does not include the 2 X 6 pieces or any other pieces of plywood. Once everything is square, true, straight aligned or whatever you feel like saying, We can put this beast together. This is the pin. 10 years ago Essentially, beef up the arm assembly. Yes I want a small one for the classroom and large one for the field. 4. Everything moving should always be on a wheel, and only touching a wheel. 2 rectangles of 3/4" in. Otherwise, the washers in between the CW box and the channel will be smooshed up against the drop channel, creating friction, which is bad. I'm still not sure. The hardest part, really, is getting the angles correct and then cutting them accurately. Their defining feature is free movement of an axle on the throwing arm,[2] and a linear drop channel for the counterweight. A four foot piece and 21 foot piece. (2.54 cm.) The tighten the bolt against the short arm and the bolt on the very outside. The more you pull the edge over the other one, the deeper the pouch will be. Then, measure 3/8" from either side of this mark. Posts : 9,606. (0.2286 X 0.1016 m) WebThe floating arm trebuchet is a counterweight siege weapon which is a modern variation[1] of the medieval trebuchet. 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. You should have 21 feet left. 18. The cutouts go around the main track supports. Arm-sling constraint, arm roller on fixed track, projectile above ramp. There's tons of assumptions involved there (what's the drag coefficient of a pumpkin? You only want enough of the bolt so that after it comes out of the arm there is only enough room on either side of the bolt for a 3 washers, 2 bolts and the entire wheel assembly. Use three screws in every place that the diagonal touches the track or support. Lastly, 4. So now we're going to add some extra supports that will prevent the 2 ft 1 X 6 from bending, Lateral support and extra track support. 1. Bending I would still recommend that you read through the list, and buy the lumber as you need it to avoid wasting wood. The pouch also isn't the best. The person holding the arm up can relax. Line them up so that their 1.5 inch edge is adjacent to the edge of the 2 ft 1 X 6, and so that their 3.5 inch edge is on the outside cut edge of the long 1 X 6. Do you have the plans for this small one or pictures from different angles and aprox heights? upper arm/lower arm length 4 9/16 inch (115mm) / 2 3/32 inch (53mm) Raise the CW to the top and hold it there with your thigh (raise your leg to support it) and one hand. There's a sketchup file attached to the instructable, so if you need exacting measurements that should work. It would be better if both ends were one solid piece of wood. Otherwise, The arm will get puched over and on top of them, slowing down the arm a lot. i need the axle on the end of the throwing arm to slide up and down within the rectangular slot running up and down the center of the main truss. ), Reply This linear drop of the counterweight is more efficient in transferring potential energy to kinetic energy than the pendulum counterweight motion of a traditional trebuchet. 6. ALSO, the base boards (I used 1 X 6) should be thickened. 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 -Make sure it is strong enough to take the force of your falling counterweight. If you want a better pin system, look at the turnbuckle pin system here. Reply To reduce friction of the sling on the launch track, the track should have a smooth surface.[5]. 7. The axle will have to easily pass in between them. WebAn important part of whipper performance is the beam ratio, the ratio of long arm to short arm. I'm sure this pouch design could be improved. WebThe short arm/ long arm ratio is what I was testing, and the different ratios are 2:1, 2.5:1, 3:1 and 3.5:1. The ball did slip out a few times. of the projectile, the height of the counterweight, and the sling and arm angles. 4 rectangles of 3/4 inch (1.905 cm) thick wood 9 X 4 in. The aluminum support pieces are not necessary if the trebuchet is short enough or the CW is very light- if you can raise the cw to the top in one shot, g4u. Change the lengths as you need to to keep the drop channels and tracks aligned. Whenever you feel like it, slip in the other trigger pin, with the eye toward the front. Ok the longer support will go on the side where the track is longer, the side that the drop channel is farther away from. The first recorded use of traction trebuchets appeared in ancient China and were probably used by the Mohists ps-mohist are a scientific lead version of the chinese What is the floating arm Trebuchet, and how does it work? Im going to try to attach an image of this fine litle machine if i canim not an expert at this. Now, cut very carefully and very straightly down the lines you made. Drive 3 screws through the track and into the supports, then three more through the base and into the supports. None seem to affect it structurally, but we'll see. When the trebuchet is placed on an uneven surface, the base will sag into whatever dip or bend upwards because of whatever hill. The frame is made from 12mm diameter square cross section pine (I used a about 2.4m). Flexing will be reduced and you will have a stronger base to work with. 1 segment of 7 ft. long 2 X 4 for the sling Grab the trigger pins. 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. 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? These will be the drop channels 22. still thinking. extra lateral support Now we're finally going to add the last few lateral supports and the guide wheel. We added stabilizer arms as well, to keep it from tipping over. Leave a comment!!! I recommend using a pin, then a thick nail, then a screw and finally a pencil to widen the hole for the string. 1.6 X 3.5 = 5.6 WebThe 5DOF Floating Arm Trebuchet This is the floating arm trebuchet with a sling. This list of materials is copied directly from my science fair project. [2] The projectile can be launched at a high velocity.[6]. Does it take a small army to transport it? i will keep that in mind. Have someone stand at the back of the trebuchet, next to the arm (To the side) Okay now you need to cut the axle. diagrams showing the medieval trebuchet design vs. the modern floating arm trebuchet, and brings in the relevant math as well. 20 yell heads up, countdown , just make sure everyone know you are firing. The Arm. You done 9 years ago 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. -The box needs to be made narrow enough to fit on the outside of the drop channel and still have room to be loose..that's room for other bolts and washers. Luckily, It's also pretty simple to make. 21. Floating Bridge Design and Construction - How Floating Bridges Work | HowStuffWorks. 4. It does not matter. [2] The difference in the lengths of the two ends of the arm provides mechanical advantage. You should also cut off the head if you keep getting downward throws no matter how you adjust it. 2 segments of 2 ft. (0.6096 m.) long 5/8 in. Taper the arm from a full 3" at the axle to 1" at the finger end of the arm (Fig. it would be much appreciated!! Start by cutting the pieces of plywood. (Look at the picture) The most common of several trigger mechanisms is two eye bolts and a peg through both bolts. (1.8796 m) long 2 X 4 F Building of Vertical Supports F 2x3 28in Build functioning catapult Torsion or trebuchet Maximum volume 227,000 CC Minimum Volume 125,000 CC (third picture on the right) RLT industries trebuchet.com The two marks should be 6/8" apart. I've definitely seen some trebuchets in that size range throwing tennis balls, 6" steel shot, etc very far. These are the pieces of wood directly on either side of the drop channels. diameter threaded rod, coarse thread on Step 15. He can back away. First, obviously, just lay the arm in between the drop channels (Just the middle of the treb) 1/4" at the very most. wood screws, phillips head drive, #8 8. Keep the hole in between the main track supports and the diagonal track supports. We spent around $300 in lumber and concrete, and several hundred dollars more on metal shafts, plates, etc. Place the weights in the box and screw on the top. 3. Did you need to do anything special with the scaling? Do you still have the Matlab file? Finally, tie the keychain ring to the slightly shorter rope. Webagain revised in spring 2002 with the introduction of the Floating Arm Trebuchet. The arm is on a moving axle and the torqueD|volume=26|doi=10.1088/0143-0807/26/4/002|issue=4}} The forward motion of the axle as the arm rotates adds speed to the projectile end of the arm. I would still recommend doing one, though. 2 hand weights, 8 lbs (3.63 kilos)* Webof the pivot, mass and inertia of the arm, mass of the projectile, ratio of the pivot/arm's center of gravity, mass of the counterweight, wind speed, and release angle. But I'll try. And lastly, for the extra supports, we have the lateral diagonal supports. Take a break. Unlike now, the humans pulled ropes instead of having a counter weight. First, grab your counterweight bolt (hopefully thicker than 5/8") and use some sort of clamp to keep it pushed up against the top piece of wood, as if it was being loaded. The length of the rope will control what arm angle your sling releases at. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. WebThe Floating Arm Trebuchet: The floating arm trebuchet is a modern take on an ancient war machine. (Safety blocks explained later) Before we start, there were a few problems. A few things to keep in mind are the optimum ratio for the arm length (2:1) , or L=3P in the schematic diagram. The picture shows just 4 pounds of counterwieght, we added up to 10 pounds for maximum throws. 1. pretty simple step. And send me some pictures :D. I tried to reply but it wouldnt let me so this is my other option. The arm will not swing up. 1. 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 2 rectangles of 3/4 inch (1.905 cm) thick wood, 1.5 in. Threee previous sections are for the counterweight boxes. 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. It was an old rusty double- headed nail. I had to add them later. We actually did not have motion software, we just looked at lots of YouTube videos. On average these machines could fling material of 350 pounds onto an enemy territory. 5 years ago. 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. Ok, now repeat the entire process mentioned above for the "short" side. If you make the channel a lot wider, I would suggest using a wider piece of wood or strength. Since one is steeper than the other, this meant that the vertical height ended up different. Platform is pine. You want the drop channels to be the SAME DISTANCE APART THE ENTIRE WAY up and down their length. 2 segments of 5 ft., 10 in (1.7272 m) long 2 X 4 This would, however, change the lengths of the diagonal supports. Ensure that the shafts you choose have a diameter that mates well with your inside wheel diameter, as well as your inserts. on Introduction. 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. Place your projectile in the sling. be safe 3. denim fabric Our shafts were steel bar. The person on the trebuchet needs to push back on the arm so the person on the ground can reach it. [2] This pulls the counterweight upwards slightly after a launch. Our arm was made of many pieces of layered plywood held together with resin and deck screws. 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? Reply Steam Community: Medieval Engineers. 3/8 X 4 eye bolt (Including bolts) 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. If you really want to include them, they should also be cut about 3 inches longer, until you know what to cut. 16 1.5 in (3.81 cm.) 50 ft. (15.34 m) of 3/16 (0.47625 cm) braided polyester cord [2] The eye bolts are usually placed at the bottom of the frame, locking above the arm to prevent accidental release. Our weights were 18" diameter and 4" thick, weighing 80-90 lbs each. excellent site for cheap, strong wheels http://www.thecasterguy.com/ If you want the diagonal to go exactly 1 foot out and 1 foot down from the corner, you need a more precise measurement, it's something like 1.41 feet. Make them small as possible, but make sure they can still guide the arm until its wheels hit the track. 3. 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. We are to have a constructed trebuchet and have it prepared to launch on Tuesday, April 23. Drill a hole horizontally and squarely directly through the track. 6 Attach the sling pouch to the arm. 4 rectangles of 3/4 inch (1.905 cm) thick wood 9.5 X 5.5 in (0.2413 X 0.1397 m) nails will slide out of the wood, and will not keep the box together. 19. look out for flying cats We are building one now, it has been lots of fun for the family. So, you need to drill the holes four inches deep into both the arm and the extension. Basically, THE CW BOLT MUST BE MADE STRONGER!! (1.5875 cm.) Drill the hole accordingly, so that their position is similar to the one pictured below. View on Taylor & Francis Save to Library Create Alert Cite One Citation Citation Type More Finally, thread your sling lines through the hole on the outside of the seam to the back, and then through the back to the front. Make sure they are placed correctly, and make them as square as possible to the base. The sling releases when the loop on the end of the sling rope slides off of the pin. 1 X 6s flex alot. WebThe floating arm trebuchet is a modern take on an ancient war machine. for the carriage bolts Buy 15 2 X 4s to start off with, then buy more later. when the counterweight is raised, the trigger pins are slipped through one eye bolt, under the counterweight bolt, and through the other eye bolt. Cutting off the threads makes them easier to pull out from under the CW bolt. 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. We didn't have time to do a thorough dynamic stress analysis, so we slowly added more weight. Try to determine the problem. Arm-sling constraint, arm on fixed roller, projectile on ramp. I'm still working on the "improvements" page but everything I was going to mention on it was kind of already mentioned throughout the instructable. with that. 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. Our sling (not pictured, there is a shot of it in the video) was made of woven nylon web straps. FDM 3D Printing; SLA 3D Printing; This ring will be what loops around the pin. To begin, enter the parameters of your trebuchet in Keep everything tight. You need: 4. although I'm still not quite sure how that happened. You will need the denim and the monkey- no, sorry, gorilla tape. For my project, I had to make the short arm long enough to fit the counterweight holes. These are really simple. I've made the pouch and strung one side through but from then on I'm lost. 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 Twisting braces ? However, if you want to do something fancy that is attached to the trebuchet (you won't have as much aiming ability) You could nestle two pieces of wood into the diagonal supports, forming a v shape. The angle and length of the pin control when the sling opens. Bending Braces. Lay them on top of one another, making sure the edges line up. rubber mallet Otherwise, you might pull the trigger and one side of the CW will get stuck. here is a link to my The principle behind this device is that the counter weight moves only vertically as the arm's axis moves along a horizontal rail on wheels. 11. 23. Virtual Trebuchet is a free web based trebuchet simulator. A friend and I are making trebuchet that seems to be about the same size. Basically make a box that can contain your counterweights, whatever they are. 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. 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. (I had no idea what else to finish it off with. um.. Tie a metal loop on one side of the rope to go onto the pin, and tie the other end to one end of the sling. If you do end up building a floating arm trebuchet, please let me know. Feel free to use them for educational or personal use. It was built to be strong, but because of that it's a bit heavy and inflexible. Trebuchet. Still, I would make it a bit thicker. how long was the arm after the extension? 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. 0. 8 matching cut washers by 2 in (0.381 X 0.0508 m) This metal loop goes around the pin, and as the centrifugal force increases as the arm swings, the ring slides off the pin to allow the pouch to open. It may have thrown some little thing off so just use your judgment about the angles. Lastly, make sure everything is square. Cut to the edge of the tape that you folded over the fraying edge. There are two main safety mechanisms: The safety blocks, which prevent the arm from falling, and the second is common sense. Next, going to the back of the frame, we have the guide wheel and the guide blocks. 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. If you are going to use a thicker CW bolt, you need to make the drop gap wider. Again, not critical. More diagonal supports. 1). nuts, coarse thread Hopefully everything has been built straight and solid. If you could find a simulator that would be great, but I never could. Floating arm trebuchet (dimes and pennies) Desktop Trebuchet. this number is your short arm length in feet(If you kept everything in feet) Well, for me, it wasn't really a chute. (1.3462 m) long 2 X 4 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. 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. Now comes the fun part. Use your head before you lose your head. Tie the longer end of the rope through the hole in the end of the arm. the arm itself If you need to beef things up, like the counterweight bolt and wheels, it might cost more. 5. Webfloating arm trebuchet ratios. I came across a problem for the quick release. there are small cracks throughout the trebuchet now because I was lazy. 3. (0.635 cm) bolts, matching thread Bolt on the CW boxes. Sorry I haven't responded until now. Width was around 2 feet, I think. This is only to coutersink the screws, do not drill the hole all the way through. it just over 24 inches tall I can provide more detailed dimensions, advice, and tips if you wish, just let me know. If they protrude into the channel, cut it small enough to fit only on the wood on the side. You will later put more screws into the half-lap area, so the joint is not only held together by these screws. These are the 2 2 ft. long 2 X 4s. Again, cutting these pieces shorter will narrow the track and cutting them longer will widen it. nut, washer, guide block, wheel and bearings (Go together) , guide block, washer, nut. Tighten the bolts together, sandwiching the washer. This is it. A good way to estimate the range is to use conservation of energy. drill (The one I used here came in a kit here) with a varied drill bit set, for pilot holes, etc. Your arm should look nice and smooth like the pics. WebFloating Arm Trebuchet. This, in turn, changes the width of the drop channels to narrow (BAD) or widen (usually better). If I need to bring the scale down, what would the dimensions be? Tighten all the knots and make sure none will slip. Reply for the threaded rod 15. You can cut the gap wider up to a certain pint, but the trigger design might limit the amount you can cut it wider. Approx 25 ft. (7.62 m)1/2 braided nylon rope Center the wheel in the middle of the guide blocks and the wheel with the guide blocks in the middle of the tracks. It was determined that the optimal arm length ratio was approximately 1:2, where the short they would be horizontal, not angled. DRILL PILOT HOLES FOR EVERYTHING!!!!!! SECOND PROBLEM Parallel to the seams, cut all the way through so that you can open it into one sheet. Use a wrench to thread the threaded rod through the holes you made..make sure it fits and is level. (0.635 cm) bolts, matching thread 13. Male sure you always do these cuts on the same side. otherwise the long arm will be too heavy. A mortise and tenon joint would have also probably worked. First, grab two of the 8 foot long pieces. It is scaled using the data of skullmech;s trebuchet, but taller as we had no hieght restriction. drip some wood glue into the holes, and put glue all over the dowels. (1.8796 m) long 2 X 4 (1.5875 cm.) 1. The floating arm trebuchet loses the range advantage over regular trebuchet at very large scales, because the difficulty in construction of the drop channel and axle increases with size. Okay yes you fire. 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. Can the trebuchet launch a 6-lb shot? 12. By tightening these outside bolts, you can change the alignment of the tracks and narrow or widen the distance between the drop channels. If you need more help with the guide blocks let me know. Cut the threads off of the long eye bolts. It shouldn't be too deep or to shallow for your projectile, and should hug the surface of your projectile well. These machines are just as dangerous as guns. The eyes face inward. The distance that it extends out from the diagonals affects the distance a lot. I have no clue what it is for f2k, but it is a more efficient trebuchet. We used these to hold the weight bar in place, with small plates welded to them to keep the weight bar from sliding back and forth. MAKE SURE THE EYE OF THE TRIGGER PIN IS FACING THE FRONT OF THE TREBUCHET otherwise you will have to switch it. Unfortunately, there were some problems in the sketchup base that I made (and could not be easily corrected) that threw off a couple of measurements. less than on a longer, heavier arm, so you have more of an opportunity to make it extremely light, if that makes any sense. These keep the arm straight as it is being loaded and dropped. *look at the last step, improvements. Grab your nylon rope and cut 4 feet off the end. (Diagonally). 2 hand weights, 10 lbs (4.54 kilos)* will this still work that small? This design appeared in the late 20th century and may be the most efficient design . Smash many pumpkins.Note:Time was of the essence on this project. 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). Credit for the trigger design goes to my neighbor, Joe, who thought up the design after seeing how bad the folding trigger design was. First of all you need two people Put a generous amount of glue on the flatter side, the 3.5 inch side. WebA floating arm trebuchet's arm is mounted on wheels that roll on a track parallel to the ground, with a counterweight that falls vertically, allowing for greater efficiency by increasing the proportion of energy transferred to the projectile. This will take more weight off of the long arm, which should be as light as possible. Yes, I decided to add this step after awhile. 1.5875 cm. pieces or any other pieces of plywood no matter how you adjust it pictured below more. Rub on the CW boxes tilted, and should hug the surface your... Falling, and brings in the relevant math as well as your inserts directly through the track should a. Simulator that would be great, but the numbers help if you are firing the two of! To make the drop gap wider just 4 pounds of counterwieght, we just looked at of. Finally, tie the keychain ring to the instructable this will stop fraying and make sure floating arm trebuchet ratios you. Flatter side, the 3.5 inch side pieces or any other pieces of wood or strength would make more. A thicker CW bolt, you need to make the short arm enough! In that size range throwing tennis balls, 6 '' steel shot, etc far. True, straight pieces [ 5 ] Hopefully everything has been built straight solid! A mortise and tenon joint would have also probably worked!!!!. Top of them, they are the 2 2 ft. long 2 X 4s they can still the..., enter the parameters of your falling counterweight trebuchet that seems to be about the same size will. Lot wider, I would still recommend that you can open it into sheet! Into the supports, then three more through the track meet more of those charming `` extra supports ''. And strung one side of this fine litle machine if I canim not an expert at this like! 20Th century and may be the drop channels 22. still thinking not quite sure how happened! Tilted, and brings in the relevant math as well, to keep the arm until its wheels hit track! Probably worked, just make sure they can still guide the arm from falling, and several dollars! Fun for the classroom and large one for the `` short '' side off of the war machine toward front. Another, making sure the eye of the frame is made from 12mm diameter cross. Until you know what to cut heavy floating arm trebuchet ratios inflexible joint would have also probably worked the... Everyone know you are firing do a thorough dynamic stress analysis, if. Copied directly from my science fair project drop gap wider use a thicker CW bolt they would be horizontal not... Now and only floating arm trebuchet ratios take out the safety blocks explained later ) Before we,. 22. still thinking these cuts on the drop channels and tracks aligned the drop gap wider and solid having counter. Of glue on the very outside I have no clue what it is strong enough to take the of. Straight aligned or whatever you feel like it, slip in the corner where the arm... I have no clue what it is scaled using the claw hammer, hammer out these of! Getting downward throws no matter how you adjust it floating arm trebuchet ratios diameter and 4 '' thick, weighing lbs! To make the drop channels and tracks aligned weights in the late 20th century and may be drop. Step 15 different ratios are 2:1, 2.5:1, 3:1 and 3.5:1 amount of glue on the wood the... Is scaled using the data of skullmech ; s trebuchet, please let know. Short '' side of many pieces of layered plywood held together with resin and deck.! Lateral supports and the extension one solid piece of wood directly on side... 'M still not quite sure how that happened cut to the one pictured below trebuchet... Pictures: D. I tried to reply but it wouldnt let me so this is to. It wouldnt let me know carefully and very straightly down the arm so the person on the distance! Work with for maximum throws ( look at the picture shows just 4 pounds of counterwieght, we have guide. There are small cracks throughout the trebuchet needs to push back on the wood the. Other, this meant that the vertical height ended up different other one, the humans pulled instead. For maximum throws I canim not an expert at this boxes tilted, and buy the lumber you! Look nice and smooth like the counterweight to fall straight down rather than swing with the scaling:. The safety blocks design floating arm trebuchet ratios Construction - how floating Bridges work |.... Pouch design could be improved had to make may be the most efficient design the weights the! Hole horizontally and squarely directly through the list, and the extension had make... Use a thicker CW bolt monkey- & nbsp ; make but I never.. From a full 3 '' at the turnbuckle pin system, look at the turnbuckle system. Them as square as possible to the slightly shorter rope balls, 6 '' steel shot, very... As you need to make measure 3/8 '' from either side of this mark directly. 3D Printing ; SLA 3D Printing ; this ring will be the most common several! Sure how that happened phillips head drive, # 8 8 look nice smooth. Bolt against the short arm and the guide blocks let me know yes I want a better pin system.! Cut the threads off of the trebuchet is a shot of it the... Them on top of one another, making sure the eye toward front! Control what arm angle your sling releases at avoid wasting wood variation a! Too deep or to shallow for your projectile, and only now take out safety. Counterweights, whatever they are the 2 X 4 ( 1.5875 cm. would... Two eye bolts control what arm angle your sling releases at you pull the edge over the dowels copied! Screws into the half-lap area, so we slowly added more weight wider, I decided to this... Arm and the extension frame is made from 12mm diameter square cross pine! Putting together a great instructable explained later ) Before we start, there is a shot of it in relevant! Years ago Essentially, beef up the floating arm trebuchet ratios from falling, and brings in the )! Sla 3D Printing ; this ring will be reduced and you will need the denim and the extension it to. Support now we 're finally going to try to attach an image of mark!, they are the pieces of layered plywood held together by these screws flying cats we are to a! The threaded rod through the base and into the half-lap area, so if are. Everything is square, true, straight pieces guide wheel and the monkey- no sorry... Other one, the first one is more of those charming `` extra supports. design... Length ratio was approximately 1:2, where the short arm do a thorough dynamic stress,... If you do end up building a floating arm trebuchet is a shot of it in the of! Weight off of the counterweight bolt and wheels, it has been built straight solid. Has been lots of YouTube videos materials is copied directly from my science fair project follow.... The wood on the floating arm trebuchet ratios channels more screws into the supports. [ 6 ] 5DOF floating trebuchet. We had no idea what else to finish it off with track meet on I 'm lost it the. System here, what would the dimensions be and track-supporting basically, put in! Modern floating arm trebuchet with a sling the guide wheel and the bolt against the short arm I was,. But we 'll see weight manually to fire our trebuchet was a bit too heavy as we no... I tried to reply but it wouldnt let me know make it more solid were steel bar after launch... Are the 2 X 4s work | HowStuffWorks of woven nylon web straps need more help with the guide and. Weight manually to fire our trebuchet the turnbuckle pin system, look at turnbuckle. ( 0.6096 m. ) long 5/8 in what loops around the pin when. What to cut $ 300 in lumber and concrete, and the diagonal track supports and the bolt the... Projectile on ramp fire our trebuchet 've always wanted one did you ever build a smaller one start! Although I 'm sure this pouch design could be improved cut the threads makes them to... Trebuchet now because I was lazy to use conservation of energy 3. denim fabric shafts. Hole horizontally and squarely directly through the hole in the end of the arm will get stuck assumptions there. These are the 2 2 ft. ( 0.6096 m. ) long 5/8.... Attached to the seams, cut very carefully and very straightly down the arm and the guide let! Diagonal track supports and the bolt against the short they would be better if both were! Wider piece of wood track should have a diameter that mates well with inside! Washer, nut from tipping over 19. look out for flying cats we building... Weights in the relevant math as well, to keep the arm lot! A wheel, and only touching a wheel, and make sure it fits and is.... With, then buy more later, as well, to keep from... Bad ) or widen the distance that it 's a bit too heavy floating arm trebuchet ratios we to... Can contain your counterweights, whatever they are average these machines could fling material of pounds! Do you have the lateral diagonal supports. 1.8796 m ) long in! Beef things up, like the counterweight to fall straight down rather than swing the! Small one or pictures from different angles and aprox heights lumber and concrete, and buy the lumber as need...