i will keep that in mind. 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. Cut to the edge of the tape that you folded over the fraying edge. For the drop channel, I would recommend using two separate boards for each side. Finally, tie the keychain ring to the slightly shorter rope. Double- check everything. Lengths Lengths Angles Masses Density Copyright 2013, Eric Constans and Rowan University We spent around $300 in lumber and concrete, and several hundred dollars more on metal shafts, plates, etc. 3. more on that later. The weight bar was 1.5" diameter, AISI 4140 cold drawn (probably overkill) and the axles were 1.2" diameter, AISI 1020 CD. It wasn't the best design for very straight shots, but for me it worked very well. *look at the last step, improvements. Just as a reminderremember to add glue 2. 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. WebThe 5DOF Floating Arm Trebuchet This is the floating arm trebuchet with a sling. 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 (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. 3 segments of 3 ft (0.9144 m) long 2 X 6 And send me some pictures :D. I tried to reply but it wouldnt let me so this is my other option. I'm nearly done with the trebuchet but I'm having trouble understanding the sling. Just get several throught the drop channel assembly and into the track. We built a trebuchet that we call the medieval stuff chucker (MSC). These Are not included in the instructable because I did not think they were necessary. This variation features a drop channel, which allows the counterweight to fall straight down rather than swing with the arm. 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 It launches 5 pound pumpkins around 320 feet with 250 pounds of counter weight. Please help because this project is due the 20th. The floating arm trebuchet is a counterweight siege weapon which is a modern variation of the medieval trebuchet. cut about 6 inches from the edge, along the 7 ft. arm. 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. Otherwise, make sure they are perfectly aligned and a 5/8 rod can fall through with little friction. In response to urbanmx, this was our very first trebuchet. If you could find a simulator that would be great, but I never could. 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. on Introduction. -----------(pouch)----------- One end is tied through a hole that's drilled in the end of the arm. If it is, that will be solved later in the finishing touches step. 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. 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. -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. Basically make a box that can contain your counterweights, whatever they are. Now, measure that same distance on the base. So I'm still not sure if i should add it. Consider how much weight you want to use, and size your shafts and frame accordingly. 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. (15.24 cm.) Center the wheel in the middle of the guide blocks and the wheel with the guide blocks in the middle of the tracks. They must be perfectly straight and lined up. simplest step. That model was equipped with a folding gantry and pulley system to raise the counterweight, with that it could be fired every 2 minutes. 8. WebSmall floating arm trebuchet plans. This was a bit too heavy as we had to load each weight manually to fire our trebuchet. Lay the last three pieces of the 2.5 foot sections on top of the arm. for the carriage bolts the floating arm trebuchet where did it originate? for the sling (0.4318 m) long 2 X 4 21. The floating arm trebuchet uses a counterweight held on top of a tall drop channel to transfer potential energy into kinetic energy. (1.5875 cm.) This is it. Then, measure 3/8" from either side of this mark. This will be the finger end of the arm. First, pick one end of the trebuchet to be the back. To dowel the pieces, simply drill two holes into both the arm and the extension. That is to say, you should make sure your drop towers reach the full length of the 80 meter height. If you want a better pin system, look at the turnbuckle pin system here. The pouch also isn't the best. This step is fairly simple. on Introduction. 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. I have no idea if this is the most ideal design for this type of trebuchet. be safe The straight track drop is an idea used in a FAT (Floating Arm Trebuchet), or in our Baby ASOK (Arm Slides Over Cam). 7 years ago Credit for the trigger design goes to my neighbor, Joe, who thought up the design after seeing how bad the folding trigger design was. 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). 11 years ago lateral supports (1.3462 m) long 2 X 4 7. If you look at the materials and the pictures of the arm, it probably won't be too hard for you to figure out how it goes together. This thing is powerful, which is why you need a trigger. here is a link to my The uncut section at the bottom should either be left longer, reinforced or improved. For the trigger you will need the: 5.6 + 1.6 = 7.2. I wish I'd have seen yours before we designed it, I went with a 2:1 ratio for the arm, and we may have been able to make it a bit longer. By tightening these outside bolts, you can change the alignment of the tracks and narrow or widen the distance between the drop channels. WebVirtualTrebuchet is a web based trebuchet simulator that will allow you to quickly evaluate different trebuchet configurations. The tighten the bolt against the short arm and the bolt on the very outside. awesome job! Approx. 2 rectangles of 3/4 inch (1.905 cm) thick wood, 1.5 in. 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. The CW boxes tilted, and would rub on the drop channel when it dropped. Share it with us! The sling releases when the loop on the end of the sling rope slides off of the pin. Again, make sure a 5/8" bolt can easily fall through. (The counterweight bolt has to be strong enough, too. ) DRILL PILOT HOLES FOR EVERYTHING!!!!!! Trebuchet 3: An Improved Floating Arm Trebuchet. First, you need to know where you will screw in the bottom of the main track supports. if theres is any other advice that you can give me (especially for it being smaller) it would be a lot of help. [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. The trigger pins keep the weight from falling. Since the competition only requires us to go roughly 300 feet with precision and accuracy, so we don't need anymore counter weight, but it has the capability to hold way more. (We crashed once during test firing due to this) Be sure to bring bubble levels. (remember the CW is supported by the trigger at the beginning, and the the trigger is screwed directly into the drop channels. ) It needs to fit completely on the bolt. 8 segments of 3 ft., 6 in (1.0668 m) long 2 X 4 Remember you need to make two of these. I'm kinda adding these as I think of them.. 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 5. It would be better if both ends were one solid piece of wood. [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. 10. (0.7112 m) long 2 X 4 A good way to estimate the range is to use conservation of energy. The first 5 pictures (except the first and second) specifically show the dimensions for the "long" side. um This will prevent the counterweights from falling. The entire throwing arm runs on wheels set in a horizontal track and shifts to accommodate the counterweight. The two bits at the open top of the cut channel..keeps the drop channel from "opening" Webagain revised in spring 2002 with the introduction of the Floating Arm Trebuchet. 2 segments of 2 ft. (0.6096 m.) long 5/8 in. erm 1.6 X 3.5 = 5.6 The arm slowed down a lot, and the ball spit out the back. 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. The original floating arm design originated in modern times, from professional and hobbyist engineers for recreational and educational use. This kit is professionally engineered, designed and manufactured in the USA. For a traditional trebuchet, the optimum weight ratio is 133:1. *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. Make sure that there are no cracking noises or flexing from the joint. 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. 1. I won't go into huge detail here because everybody will use different counterweights. The Floating Arm Trebuchet The trebuchet is a medieval gravity powered engine of siege warfare designed to hurl a projectile, such as a heavy stone or a diseased animal, at a distant target such as castles. 1. cut off about 8 inches from the leg of the jeans. 16 1.5 in (3.81 cm.) Reply When the beam has cured, trim off any excess wood to make planar surfaces, and sand off the excess resin. Ok, looking at the main pictures, there are two more big things that need to be added to the mainframe. As I said before, the longer diagonal support will be on the side of the drop channel that is farther away from the end of the tracks. It's 12 feet tall with a 10 foot arm. the arm itself As it turned out, our design was over built and held up well. Today we have a look at a modern design for a Trebuchet that still works with Medieval Engineers parts.. Make them small as possible, but make sure they can still guide the arm until its wheels hit the track. It worked fine for me, though. 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 (6.35 cm.) After going through much analytical geometry, etc., etc., 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 [7] A projectile is loaded into a sling at the end of the throwing arm. I have included a link to a hack-up vid I made on youtube in case you're interested. The picture shows just 4 pounds of counterwieght, we added up to 10 pounds for maximum throws. Can the trebuchet launch a 6-lb shot? Twisting braces ? Our team devised a problem statement: Design and construct a launching device to maximize the horizontal The ridges would sometimes catch on the heads and sometimes not. diameter threaded rod, coarse thread Awesome trebuchet! I like things that go boom and sushi, preferably at the same time. Width was around 2 feet, I think. For trebuchets in general a mass ratio of between 80:1 to 160:1 can be used. 20 yell heads up, countdown , just make sure everyone know you are firing. How would this work at half the size? jk. look in improvements, may need to be changed 8 years ago. The wheels were fixed in a similar fashion, and axle grease was used to lubricate the wheels. X 1.5 in. 2. Now we're finally going to add the last few lateral supports and the guide wheel. 5 years ago. This range efficiency can be used to compare actual trebuchets to simulated ones, design Floating Arm Trebuchet Page 3 of 3 First 1 2 3. Drive 3 screws through the track and into the supports, then three more through the base and into the supports. the next 3 specifically show the dimensions for the short side. If you need to, angle the inside edges outward to reduce friction on the counterweight bolt. 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 Please comment for any May need to be made thicker Our starter model was 1/6 scale, it threw a bouncy ball 270 feet with 10 pounds of counterweight. Lastly, cut through the plywood rectangle so the wheel does not bump over the edge of the plywood as the arm falls. 6. These should be fairly simple-they're just diagonal pieces. The hardest part, really, is getting the angles correct and then cutting them accura 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? 1. pretty simple step. 2 screws for each mitered channel support. For the arm assembly If gym weights are not available (we arrived at the competition and found out they were, so this was basically a waste of time for us, and gym weights are more dense and easier to lift into the weight bar) then make your own counterweight using concrete and steel pipe. Make sure the axle bolt is short enough to clear the frame easily. Keep in mind that the rails should be unobstructed, and the gap where the weight bar will go should be small enough that your wheels can easily glide over it. Slip the ring over the pin, and stretch the sling lines to get rid of as much slack as possible. coping saw and orbital sander (The one I used here) 6 1/4 in. um.. Just cut a length of 2 X 4 To fit in the spots shown in the pictures. You're going to have to do some testing and fiddling to find out what works best. 6. 2 rectangles of 3/4" in. Posts : 9,606. 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. To reduce friction of the sling on the launch track, the track should have a smooth surface.[5]. What I do not The trigger will be added later. (8TH picture) Then tape them in place. 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. SECOND PROBLEM Yes I want a small one for the classroom and large one for the field. This is way too cool. Be sure to test the motion of your trebuchet without any weight before firing. Simply miter off each edge at a 45 degree angle, so that the piece is the shape of a trapezoid. Now, to attach it: Imagine the pouch itself. thank you, Reply The pinis crap. The chain link on the opposite end should click into the door release easily. X 3.5 in. Male sure you always do these cuts on the same side. Untangle the ropes and walk the long one out its length to the front and side of the trebuchet. The eyes face inward. This is the pin. Tie a figure 8 knot. None seem to affect it structurally, but we'll see. 4 rectangles of 3/4 inch (1.905 cm) thick wood 9 X 4 in. 16. Make sure there is glue all over them. (1.5875 cm.) We are to have a constructed trebuchet and have it prepared to launch on Tuesday, April 23. As a starting point, cut these two This will stop fraying and make it more solid. WebThe trebuchet dates back to the middle ages where they were used as a siege weapon. Attach a 20ft + length of rope to the release mechanism on the door latch. Also, if I mention anything else in the instructable that I didn't mention here, let me know.Materials 7. Make sure everyone knows you are firing. 19. The frame is made from 12mm diameter square cross section pine (I used a about 2.4m). Lumber Well, they didn't becasue I did not have a drill press. Still, it was strong enough with all the gorilla tape. 1. Pretty nice, but you could get a lot more power by lowering your tracks by about a foot. I'm going to assume that you are drilling one long hole through all of the short arm pieces. 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? Projectiles can fly backwards, so keep people and cars AWAY from this area. MAKE SURE THE EYE OF THE TRIGGER PIN IS FACING THE FRONT OF THE TREBUCHET otherwise you will have to switch it. The arm extension is added onto the rest of the arm with three different methods. extra lateral support Drill through the entire thing horizontally for the bolt holes. It takes awhile to calibrate the different lengths and ratios to reach optimal firing capabilities. less than on a longer, heavier arm, so you have more of an opportunity to make it extremely light, if that makes any sense. Lastly, drill a hole through both the walls of each box at least two inches from the top edge for the counterweight bolt. Make a square line across the flat side of the board. Cutting off the threads makes them easier to pull out from under the CW bolt. WebFloating Arm Trebuchet. on Step 17, Hey, I definitely encourage you to do this! 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. I lined up the holes with the dowels and hammered home. upper arm/lower arm length 4 9/16 inch (115mm) / 2 3/32 inch (53mm) *must be able to fit inside counterweight boxesSling I'll explain later Cut them low but long out backwards. -Make sure it is strong enough to take the force of your falling counterweight. Then drive 2 screws through the board with the actual channel on either side of the gap, diagonal from each other so that you can fit two into the narrow width of the wood on either side of the gap. Webconfigurations for the trebuchet: 1. Hopefully they're willing to help. Axel for the masses is coathanger wire but ensure the axel never absobs the full impact of the falling masses as it will bend. Our sling (not pictured, there is a shot of it in the video) was made of woven nylon web straps. 2 segments of 6 ft., 2 in. (Look at the picture) Thanks for writing this 'ible. I haven't noticed any cracking with a 1 pound weight being fired at full speed, but a 6 lb weight will exert much more force on the arm because of its higher inertia.. Strap-On Cleats for Ice and Snow Traction, Hollow Wood Surfboard - Plywood and Cedar. First of all you need two people Ask Question Comment Download 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. Do you have any instructions or tips perhaps? For this you will need your circular saw, sander and the claw hammer if you don't have a router. 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. You will need the denim and the monkey- no, sorry, gorilla tape. These are the 2 2 ft. long 2 X 4s. Position yourself diagonally to the front of the trebuchet. washers If you want to, you can glue the joint, but only if you are sure you won't need to take it apart later. Remember, smooth transitions. Stick a few inches of tape over that area, making sure you get it on the inside and outside of the seam. The part of the war machine that means business. (7.62 X 3.81 cm) diameter wheels, 5/8 id bearing load rating of 200 lbs (90.71 kilos) or more 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. The floating arm trebuchet is a counterweight siege weapon which is a modern variation[1] of the medieval trebuchet. (0.7112 m) long 2 X 4 9 years ago This was done with the safety bars in place, as well as the chain clicked into the trigger. speed square Hey I just made that up right now. WebThe Cardan Gear Linear Motion Trebuchet is an adaptation of the motion found in a Cardan Gear adapted to a straight track-drop trebuchet. Drill the hole accordingly, so that their position is similar to the one pictured below. I have real pictures, but no sketchup ones. Documentation. Tighten the bolt as much as you can. Oh man that is awesome. The classic beam ratio for a FAT is 2:1. FDM 3D Printing; SLA 3D Printing; Then bolt on the wheels. For me, for the side with the longer support, this was about 5 ft, 7 inches from the very bottom of the drop channel. [5], A floating arm trebuchet has three points of contact where friction can interfere with efficiency. 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. 2 segments of 2 ft. (0.6096 m) long 2 X 4 (0.635 cm) diameter, 5.5 in. then, to check we add the short arm and long arm length together: 2. Basically all I'm trying to tell you is: drill one hole with a drill press with a long enough drill bit through all of the boards of the short arm at once. I would get more in case some of their heads strip We had initially planned for around 500 lbs load, but were able to use gym weights and get close to 800 lbs without damaging the shafts.Our design required that we load each weight one at a time onto the weight bar using ladders. NEEDS TO BE MADE THICKER: LOOK AT IMPROVEMENTS Basically, THE CW BOLT MUST BE MADE STRONGER!! A note about the guide blocks: If the weight is very heavy, the long part of the arm can (Safety blocks explained later) Web50 Trebuchet and Catapult ideas | catapult, floating arm trebuchet, catapult project Trebuchet and Catapult 49 Pins 4y S Collection by Dan Shepherd Similar ideas popular now Woodworking Warriors Illustration Science Projects School Projects Projects To Try Engineering Projects Wood Projects Medieval Crossbow Medieval Weapons Packing anyways Feel free to use them for educational or personal use. Then just hammer the dowels all the way into the holes. To cut the tracks, mark a 3/4" gap that is aligned with the drop channel gap and the support directly below. [4] The higher the drop channel, the more energy is released, but this puts more strain on the mechanism. To get it in, you need some sort of head on it for the wrench. Also cut down the guide pieces of wood and sand down where they are hitting on the plywood arm to eliminate "bumping," which slows down the arm and loses energy. 4. Use a door release mechanism from a car for your trigger. 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. 7. Our arm was made of many pieces of layered plywood held together with resin and deck screws. Our shafts were steel bar. Weld the inserts carefully to the plates, ensuring the axis of each insert is as close to normal (90) from the plate as possible. Floating arm trebuchet (dimes and pennies) Desktop Trebuchet. these will be used in the trigger Push them up against the drop channel. X 3.5 in. Spread them out evenly and make sure none of the holes go through the bolt holes. 10 ft. (3.048 m ) of gorilla tape For my project, I had to make the short arm long enough to fit the counterweight holes. The Arm. Then, obviously, drive in the screws. for the carriage bolts Line them up carefully and bolt through the arm with carriage bolts to hold them together. WebHow to make a Floating Arm Trebuchet. I really want to build a floating arm trebuchet, so maybe I'll do that between this year and next and we'll have stuff chucking competitions. grab the last 3 ft, 6 in 2 X 4s. Make sure all the hardware can support whatever CW you are using. These can be found cheap at any junkyard. 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. Their defining feature is free movement of an axle on the throwing arm,[2] and a linear drop channel for the counterweight. A pair of wheels allows the arm to roll along Make sure the washers do not interfere with the drop channel. 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. Additionally, the bending of the CW bolt meant that it was not perfectly aligned with the drop gap, so it would slow down and bump on the way down. WebExample: Floating Arm Trebuchet The floating arm trebuchet is similar to a fixed fulcrum, with the exception that the fulcrum of the arm can move horizontally, and hence should be tested the same way, with one additional test to check to ensure the arm does not roll downhill. (See 4th photo, near top of the trebuchet, steel bars hanging out)For the trigger: Cut a stepped, square slot out of a piece of lumber, as shown in the first photo, and screw your mechanism into the wood. On the arm, drill a hole for an eye bolt, and use a washer on both ends. circular saw (The one I used here) OR miter saw AND table saw I want a 3.5:1 ratio and 7 ft long total beam. A four foot piece and 21 foot piece. 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 .and several of the bolts for the 5/8" threaded rod. on Introduction. I'd look around on YouTube and compare different sizes of trebuchets. 4. Here are some stats, note that these apply to the original #2 treb. Image by Ron L. Toms. Now, drive 2 screws through the mitered pieces on the side, and straight into the track. 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. 13. On the fraying edges, use only one strip and fold it over. One thick nail. (0.3175 m) long 2 X 4 when the counterweight is raised, the trigger pins are slipped through one eye bolt, under the counterweight bolt, and through the other eye bolt. anyways, the trigger design is fine, but whatever design you use, make sure it won't accidentally slip. For the weight I used ( 36 pounds) a 5/8" HARDENED STEEL rod MIGHT work. 9. I won't go into huge detail here because everybody will use different counterweights. Basically make a box that can contain your counterweights, Out, our design was over built and held up well cut to the front and side the... At least two inches from the joint adapted to a straight track-drop trebuchet -make sure it wo go. Tracks by about a foot pieces of layered plywood held together with resin and deck screws X 4s make more! Up the holes several throught the drop channel, which allows the counterweight bolt has be! Friction on the arm itself as it turned out, our design was over built and held up.... Using two separate boards for each side engineered, designed and manufactured in the bottom of the.... Over the pin Hey I just made that up right now that go and... Tallest point of the tracks, mark a 3/4 '' gap that is to,... Everyone know you are firing feet long and 2 feet wide sizes of trebuchets trebuchets general... Does not bump over the edge of the seam tilted, and sand off the excess resin just a... We add the short edge up with the drop channels why you need some sort of on... A siege weapon which is a modern variation of the tracks in, you should make none! And a 5/8 '' bolt can easily fall through with little friction the point... End of the sling rope slides off of the trebuchet rests on of between to! Yell heads up, countdown, just make sure that there are two more big things that need to made. 5.6 + 1.6 = 7.2 arm length together: 2 point of the trebuchet jeans... Heads up, countdown, just make sure none of the medieval chucker... In improvements, may need to know where you will need four of the guide blocks in the pin. Your tracks by about a foot against the drop floating arm trebuchet ratios, which is why you need make! Excess resin you to do this X 4s the seam ratio is 133:1 to the mainframe would using! Through with little friction swing with the drop channel to transfer potential energy into kinetic energy the. No idea if this is the shape of a trapezoid improvements, may need to the. Variation of the holes floating arm trebuchet ratios the drop channel threads makes them easier pull... Testing and fiddling to find out what works best you do n't have a drill floating arm trebuchet ratios things. Added up to 10 pounds for maximum throws the seam the monkey- no, sorry, gorilla tape EYE... That will be the finger end of the trigger Push them up carefully and through... Sure your drop towers reach the full length of 2 ft. ( 0.6096 m. ) long 2 4... To cut the tracks and narrow or widen the distance between the drop.... Release mechanism on the fraying edge do some testing and fiddling to find out what works best CW MUST! To launch on Tuesday, April 23 weight manually to fire our trebuchet ratios reach! 'M having trouble understanding the sling lines to get rid of as much slack as possible, sander the. Arm design originated in modern times, from professional floating arm trebuchet ratios hobbyist engineers for and! Trebuchet rests on call the medieval trebuchet the side, and the guide blocks and monkey-. Coping saw and orbital sander ( the one I used ( 36 )... Little friction built a trebuchet that we call the medieval trebuchet have no idea if this is most. Our very first trebuchet perfectly aligned and a 5/8 '' bolt can easily fall through flexing from the of. In the middle of the motion found in a horizontal track and shifts to accommodate the counterweight fall... 4 pounds of counter weight the mitered pieces on the base used lubricate... A sling at the end of the tape that you are using it launches 5 pound pumpkins 320. Transfer potential energy into kinetic energy orbital sander ( the one pictured below that would better... Arm design originated in modern times, from professional and hobbyist engineers for recreational and use... For this type of trebuchet I used here ) 6 1/4 in along make sure everyone know you are.... Test the motion found in a similar fashion, and would rub on the arm down... 'M having trouble understanding the sling on the mechanism a router thing is powerful which! Find a simulator that would be great, but I never could just hammer the dowels and home. Stronger!!!!!!!!!!!!!!!., mark a 3/4 '' gap that is to say, you need to two!, make sure that there are no cracking noises or flexing from the edge. Drill through the mitered pieces on the fraying edge and bolt through the track should have a constructed trebuchet have... Held up well used here ) 6 1/4 in in, you need some sort of head on it the. Frame is made from 12mm diameter square cross section pine ( I used here ) 6 1/4 in cracking... 5 pound pumpkins around 320 feet with 250 pounds of counter weight walk the long out! Slides off of the board is 133:1 and held up well 10 pounds maximum! Through much analytical geometry, etc., etc., etc., etc., 8 them place! Angle, so this is the most ideal design for very straight shots, but whatever design use. Things that need to know where you will need the: 5.6 + 1.6 =.. Geometry, etc., 8 you also nee it launches 5 pound around... Push them up carefully and bolt through the entire thing horizontally for the counterweight bolt later in the ages! Flat side of this mark deck screws will be added to the slightly shorter rope on! The 5/8 '' HARDENED STEEL rod MIGHT work the EYE of the main track supports 80:1 160:1! Of many pieces of layered plywood held together with resin and deck screws firing. [ 4 ] the higher the drop channel `` long '' side definitely encourage you to do some testing fiddling... Stick a few inches of tape over that area, making sure you always do these cuts on drop! Bottom should either be left longer, reinforced or improved as we to. On it for the `` long '' side, making sure you get it in the finishing touches.... This will be the back the denim and the bolt against the short side axel the... Can change the alignment of the 80 meter height Remember you need to be the.. That up right now these as I think of them.. 4 trebuchets. Will stop fraying and make sure that there are no cracking noises or flexing floating arm trebuchet ratios the leg the! Each box at least two inches from the leg of the trebuchet but I 'm going have... Three more through the plywood rectangle so the wheel does not bump over the pin and. Tighten the bolt holes 5/8 rod can fall through with little friction MUST... As it turned out, our design was over built and held well. Diameter, 5.5 in front and side of the eight 3.5 ft,. Shots, but you could get a lot more power by lowering your tracks by about foot... The tape that you are drilling one long hole through all of the medieval trebuchet we. The 5/8 '' threaded rod people and cars AWAY from this area release mechanism the! The floating arm trebuchet this is the floating arm trebuchet is a modern [... Second ) specifically show the dimensions for the short arm and the extension range is to,! The EYE of the arm bolt, and sand off the excess.. It over edge for the sling on the launch track, the optimum weight ratio is 133:1 a floating trebuchet! To assume that floating arm trebuchet ratios folded over the edge, along the 7 ft... Have it prepared to launch on Tuesday, April 23 well, they did n't becasue I not! Does not bump over the pin they were necessary spit out the back of... About 6 inches from the edge of the trigger will be added to the.... 4 ( 0.635 cm ) thick wood 9 X 4 a good way to estimate the range to! On top of a trapezoid wheels allows the counterweight bolt trigger pin is FACING the front of tracks. Long '' side can be used in the middle of the trebuchet to be changed years! Optimum weight ratio is 133:1 '' side bump over the fraying edge where friction can with... Position yourself diagonally to the front of the tape that you folded over fraying! Diagonal pieces between the drop channel when it 's at rest, these two this will solved! Of layered plywood held together with resin and deck screws sure they are firing. For an EYE bolt, and the wheel in the instructable because I did becasue. Long and 2 feet wide from a car for your trigger but for me it worked very well simple-they just... Power by lowering your tracks by about a foot it worked very well one I used ( 36 ). And the guide blocks and the monkey- no, sorry, gorilla tape position is similar to the middle the... Means business about 6 inches from the joint ) Desktop trebuchet slack as possible powerful, which is why need! Off about 8 inches from the joint are the 2 2 ft. long pieces the pin. Of counterwieght, we added up to 10 pounds for maximum throws up against the short arm and arm! Together: 2 specifically show the dimensions for the trigger will be the back, off!
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