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. (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. Again, use a bowline knot. These keep the distance between the two tracks from narrowing or widening. Can the trebuchet launch a 6-lb shot? 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? The two marks should be 6/8" apart. (2.54 cm.) Lastly, drill a hole through both the walls of each box at least two inches from the top edge for the counterweight bolt. At this point, dry-assemble your trebuchet and ensure everything fits, and that the arm will move correctly. If you need to, angle the inside edges outward to reduce friction on the counterweight bolt. Its 3.5 inch edge should also be 1/4" from the long edge of the 6 ft. long 1 x 6. The trebuchet, as is, would probably not be able to launch such a heavy projectile, but I'm not sure. The trebuchet is essentially a gravity powered energy conversion machine, using guillotine action and plunging beam to maximize potential energy and a floating arm to convert that energy into kinetic projectile motion. A wide chisel would also work. This is the only part of the trebcuhet that can vary a lot. To get it in, you need some sort of head on it for the wrench. 3. This is the hardest part of loading. WebSmall floating arm trebuchet plans. Everything moving should always be on a wheel, and only touching a wheel. the short arm is the 1 (In the ratio) and the long arm is the 3.5 (in the ratio) -3.5 times longer than the short arm. For my project, I had to make the short arm long enough to fit the counterweight holes. Here are some stats, note that these apply to the original #2 treb. Drill through the entire thing horizontally for the bolt holes. This could be done other ways, but our method looks really cool. (I saw a car roof get crushed by a pumpkin flying backwards)Use a long trigger rope and keep yourself at a safe distance.Have fun. This would eliminate cracking and make the drop channel much stronger. 9 years ago more on that later. 2 segments of 5 ft., 10 in (1.7272 m) long 2 X 4 i was hoping you could tell me what the release system was rated for and if you have any recommendations on where i can acquire a quick release, 8 years ago The seam will help prevent the string from pulling through and takes all the force of the swinging pouch. Okay yes you fire. Put the ratio hole wherever it goes. 3. Socket wrench for your threaded rod 7 years ago. (0.889 m) long 2 X 6 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. These are the pieces of wood directly on either side of the drop channels. This film is made to demonstrate some easy steps to go through when making a FAT (Floating arm trebuchet). This is it. Clamp the beam and let it dry, allowing the appropriate time for curing (follow resin instructions). 4. Maybe the wood "stretched" and then was kept in place as the glue dried. If you want to, you can glue the joint, but only if you are sure you won't need to take it apart later. Cut a piece of steel pipe for an insert and place it at the center of each form, then pour the concrete. Make sure all the hardware can support whatever CW you are using. 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. Best catapult ever (98 ft) Load more 3D Printer Info. Cut at least 3 inches longer unless you are very good at cutting angles accurately (A miter saw would help)\ The Floating Arm Trebuchet. That should bend it back upward. on Introduction, The length of the end of the arm to the center of the sling should be 1/2- 2/3 the length of the entire arm. The distance that it extends out from the diagonals affects the distance a lot. awesome job! 20 yell heads up, countdown , just make sure everyone know you are firing. Consider cost and use whatever spare or donated materials you can find. In contrast, a floating arm trebuchet features an axle on the arm freely moving along a horizontal glide track. Still, I would make it a bit thicker. (1.5875 cm.) (0.3175 m) long 2 X 4 Now, cut very carefully and very straightly down the lines you made. Drill a 1/4 hole 20" from one end, in the middle of the board, as shown in Fig. Simulated distance: 316.6 feet. 7 years ago Or you could buy a longer beam to begin with. Plywood also included in the arm WebThe floating arm trebuchet is a modern take on an ancient war machine. There's tons of assumptions involved there (what's the drag coefficient of a pumpkin? Tie a figure 8 knot. nails will slide out of the wood, and will not keep the box together. Line the short edge up with the 8 ft piece of the drop channel. 0. First, I'm going to talk about some other improvements that are more important than the arm. Spread them out evenly and make sure none of the holes go through the bolt holes. 42. [2] The difference in the lengths of the two ends of the arm provides mechanical advantage. 9 years ago The most common of several trigger mechanisms is two eye bolts and a peg through both bolts. 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. the next 3 specifically show the dimensions for the short side. You may even be able to get away with less. I just so happen to be in the construction phase of an improved floating arm trebuchet. (0.635 cm) diameter, 6 in. 3. The arm wasn't too hard to extend, BUT whatever you use to join the parts MUST be strong enough. Really cheap, really fun. The 5/8" CW bolt bent like a taco with only 16 pounds on either side. 3000, Guillotine-Style Catapult Designed and made in the USA for better quality, better performance! otherwise the long arm will be too heavy. 2. on Introduction. 91.4 meters. 7. Masses are lead (6x125g) cast from lead roof flashing. So if I could toss the weight a 100yds would be perfect. 9. I won't go into huge detail here because everybody will use different counterweights. Basically make a box that can contain your counterweights, Okay, now I'm not kidding. 2 1/2 X 10 eye bolts If the shot releases at the wrong time, adjust the pin angle. When you look at the picture, they are the big, tall, straight pieces. This may change depending on the width of your wheels. Once everything is square, true, straight aligned or whatever you feel like saying, We can put this beast together. 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. 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. 1. 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. Do you still have the Matlab file? Lastly, make sure everything is square. Tape measure, ruler You also need the braided polyester cord and the keychain ring. The picture shows just 4 pounds of counterwieght, we added up to 10 pounds for maximum throws. Have someone stand at the back of the trebuchet, next to the arm (To the side) We didn't have time to do a thorough dynamic stress analysis, so we slowly added more weight. Otherwise, make sure they are perfectly aligned and a 5/8 rod can fall through with little friction. Otherwise, the counterweights would just stop like the safety makes it do (Second clip in the video in the first step) Make a square line across the flat side of the board. Also, if I mention anything else in the instructable that I didn't mention here, let me know.Materials May need to be hanged if the diameter of the threaded rod is changed 2 rectangles of 3/4 inch (1.905 cm) thick wood, 1.5 in. Tie it so that it hangs about 12 inches (2.55.1 cm) from the top of the arm. Floating arm trebuchet (dimes and pennies) Desktop Trebuchet. 1. cut off about 8 inches from the leg of the jeans. *A few notes: the angles were based off of the sketchup model which had a few errors. The wheels were fixed in a similar fashion, and axle grease was used to lubricate the wheels. yes, it works Twisting braces ? I don't really know what I'm talking about. If you are going to use a thicker CW bolt, you need to make the drop gap wider. Yes, I decided to add this step after awhile. 4 segments of 4 ft., 5 in. The frame is made from 12mm diameter square cross section pine (I used a about 2.4m). Remember, though, that if your short arm is shorter you will need fewer bolts. These machines are just as dangerous as guns. 16 1.5 in (3.81 cm.) The guide blocks can be any shape you want, but look at the picture notes below for shaping. (1.5875 cm.) Did you need to do anything special with the scaling? On the folds themselves, use one strip of tape per side with a slight bit of overlap and stick the two pieces together. 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. Today they are used mostly for recreation and education. 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. diameter threaded rod, coarse thread Before you do that, though, make sure that you are driving them in from the bottom. Use the order of bolts and washers on either side shown in the first picture (From inside to outside the order is) : drop channel, washer, bolt, washer, CW box wall, Washer, bolt, Bolt, washer, wall of CW box, washer, bolt. thank you very much. Then, use the sander to sand it down flat and smooth. Then just screw them in. The floating arm trebuchet is a counterweight siege weapon which is a modern variation of the medieval trebuchet. This will stop fraying and make it more solid. Simulator. 8 years ago Do you have the plans for this small one or pictures from different angles and aprox heights? Double- check everything. (KE = .5*GPE, so .5mv^2=.5mgh) Solve for the velocity. A mortise and tenon joint would have also probably worked. All you are really doing is putting the arm in the drop channels. Look at the pictures for alignment. [2] This allows for a higher drop height for the counterweight,[2] which is allowed to fall down a sturdy linear vertical "drop channel". 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. Everything should be centered. In larger designs, the trigger system is applied at the top of the drop channel. Lay them on top of one another, making sure the edges line up. Webfloating arm trebuchet ratios. 2. Approx. When firing, make sure no-one is down range, near to, or directly behind your trebuchet. Otherwise, The arm will get puched over and on top of them, slowing down the arm a lot. I like things that go boom and sushi, preferably at the same time. Although later there are more. WebThe 5DOF Floating Arm Trebuchet This is the floating arm trebuchet with a sling. I've definitely seen some trebuchets in that size range throwing tennis balls, 6" steel shot, etc very far. Have a nice day Then, using the claw hammer, hammer out these slivers of wood. 24. Now, measure that same distance on the base. Thinking *this is not funny only annoying* (1.5875 cm.) 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. Our sling (not pictured, there is a shot of it in the video) was made of woven nylon web straps. Diagonal Track supports. Make sure everyone knows you are firing. 6. Check the alignment of the rails and ensure they are relatively close. 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. 6 1/4 in. Make the long arm lighter. WebThe Floating Arm Trebuchet: The floating arm trebuchet is a modern take on an ancient war machine. If you do end up building a floating arm trebuchet, please let me know. This makes the arm much stronger than regular lumber, allowing for more counterweight, larger projectiles, and a stiffer, more efficient arm. First, the two pieces are drilled and doweled. We actually did not have motion software, we just looked at lots of YouTube videos. Mark the height that you want the diagonal support to rise to. 24 5/8 in. This is essential for an efficient machine. Trebuchet 3: An Improved Floating Arm Trebuchet. By tightening these outside bolts, you can change the alignment of the tracks and narrow or widen the distance between the drop channels. 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