upper arm/lower arm length 4 9/16 inch (115mm) / 2 3/32 inch (53mm) 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. Okay step one. Basically, put them in the corner where the main track supports and the track meet. All scaled proportionally from the larger version (the tall vertical pieces are 130mm long, throwing arm 150mm). The floating arm trebuchet is a counterweight siege weapon which is a modern variation 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. May need to be shortened, look at improvements The original floating arm design originated in modern times, from professional and hobbyist engineers for recreational and educational use. Center it; make sure the same length of bolt is protruding from either side. Have a nice day I came across a problem for the quick release. If not look at step 10. Attach a 20ft + length of rope to the release mechanism on the door latch. Push them up against the drop channel. Ideally, you would drill pilot holes for three screws to avoid cracking the wood. 14. Cut at least 3 inches longer unless you are very good at cutting angles accurately (A miter saw would help)\ How would this work at half the size? Make sure the washers do not interfere with the drop channel. WebThis is a floating arm trebuchet. Put them in that corner, towards the inside. 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. The part of the war machine that means business. A good way to estimate the range is to use conservation of energy. 2. 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. 8 years ago. will this still work that small? 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. I'll post pictures as we get underway. There are plenty of places you can go on the internet to look for better ideas. diameter threaded rod, coarse thread Credit for the trigger design goes to my neighbor, Joe, who thought up the design after seeing how bad the folding trigger design was. Use three screws in every place that the diagonal touches the track or support. Thank you for reading through all this, and let me know if you actually build this monster!! And it is constructed with 1 X 6s Now, cut very carefully and very straightly down the lines you made. After looking at the dozens of picture I took, It should be pretty easy to figure out how to put everything together. Once everything is square, true, straight aligned or whatever you feel like saying, We can put this beast together. If you need more help with the guide blocks let me know. It will differentiate depending on your ratio. 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. It's a little bit tricky to get the angles perfect. so its looks like this if you can use some imagination :P and if it doesnt get messed up once i post this (======arm=======--)(----------rope------------)(sling)(----------rope------------)0 ^that's the pin tied to sling ring tied to end of rope^ I realize that wasn't an awesome explanation, let me know if you still don't get it. Do you still have the Matlab file? for the sling Upon releasing the trigger, the counterweight is allowed to drop through the channel. thick wood, 2 ft., 5 in. 4 segments of 1 ft., 5 in. Just in case you didn't know Floating Bridge Design and Construction - How Floating Bridges Work | HowStuffWorks. And, I'm not looking to chuck this 200yds. Make the arm from the 1/2" x 3" x 36" pine board. it would be much appreciated!! Get everyone away from the back and front of the trebuchet. Circuits | Floating Arm Trebuchet : 7 Steps (with Pictures) - Instructables It would be better if both ends were one solid piece of wood. SolidWorks was used here, although any CAD software or even a hand sketch would be ok. One advantage of 3D CAD was the ability to make an assembly and ensure a good fit for all the components, as well as smooth motion. Otherwise, the counterweights would just stop like the safety makes it do (Second clip in the video in the first step) Heavier projectile= earlier, lighter projectile = later. ) 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. 2 segments of 2 ft. (0.6096 m) long 2 X 4 Use a door release mechanism from a car for your trigger. WebFloating Arm Trebuchet - Hobbyist Version The F.A.T. Reducing the drop distance of the wheel axle to the glide track would reduce damage, but also reduce the range of the trebuchet. 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. Unless one eye bolt cannot support the weight, relax. These are the four sections of 1 ft, 5 in 2 X 6. Start by cutting the pieces of plywood. fourth through fifth picture will show this. on Introduction. Arm-sling constraint, arm on fixed roller, projectile above ramp. Drill holes every 6 inches into the mitered pieces deep enough so that the wood screws can penetrate the drop guides itself. X 1.5 in. Ensure that the shafts you choose have a diameter that mates well with your inside wheel diameter, as well as your inserts. 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 I like the adjustable arm ratio. Need some advice please. Short sides of the base it's smoother, faster, and prevents grooves from wearing in the wood. X 6.5 in (38.1 X 16.51 cm.) 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. Tie it so that it hangs about 12 inches (2.55.1 cm) from the top of the arm. Make sure the gap is aligned with the supports and the gap in the drop channels. 10. 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. Drill a hole horizontally and squarely directly through the track. 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. Really cheap, really fun. 12. Then fold in on top of the other one to crinkle the pouch into a more pouchy shape. (1.5875 cm.) [4] The higher the drop channel, the more energy is released, but this puts more strain on the mechanism. 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. (Left or right) First, pick one end of the trebuchet to be the back. Mark the height that you want the diagonal support to rise to. 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. One drill bit MUST be the size of your threaded rod (Mine was 5/8", it should be thicker) Ideally, the drill bit would be a foot long, or 6 inches, so that the holes in the arm don't become misaligned. The The first sketchup picture (Sorry only have real pictures of the finished thing) shows what it should look like when your done. We think that the downward throws were caused by these two heads. Ok lets get started. COMMENT RATE They should be about 2.5 feet tall. Make sure all the hardware can support whatever CW you are using. Long sides of the base thick plywood, 2 ft., 5 in. On each piece, mark 5.5 inches (The real width of a 1 X 6) from each cut edge. 3 segments of 3 ft (0.9144 m) long 2 X 6 4. The longer side is responsible for throwing, acceleration quickly due to the dropping weights. Feel free to use them for educational or personal use. Place your projectile in the sling. your best bet is to experiment with different sling lengths and pin angles. (Look at the picture) Add a little lube to the linkage and the clamp itself if needed. on Introduction, do you have the exact dimensions of the final product. Pretty nice, but you could get a lot more power by lowering your tracks by about a foot. 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. for the carriage bolts Once smooth motion is achieved, begin adding weight, but do not fire anything until a max weight test is done. That should be about 2 inches from the end of the track. Hole on to the axle for the next step.. It needs to fit completely on the bolt. extra lateral support These make up the short arm Check the alignment of the rails and ensure they are relatively close. Avoid contact with the arm as much as possible, they are only there to guide. This is it. (0.635 cm) bolts, matching thread For the arm assembly LEAVE A COMMENT AND RATE! Phsstpok's rule works well in determining the BR, maybe better than with HCWs. The frame is made from 12mm diameter square cross section pine (I used a about 2.4m). Simple Table Top Catapult. Change the lengths as you need to to keep the drop channels and tracks aligned. -Make sure it is strong enough to take the force of your falling counterweight. Position yourself diagonally to the front of the trebuchet. I just posted an instructible of our own design, it's a lot beefier, we threw 10-15 lb pumpkins around 300ft, and we actually got 720 lbs in counterweight on it, not including the weight bar or short arm. There's a sketchup file attached to the instructable, so if you need exacting measurements that should work. Thanks for the great instructable! Our starter model was 1/6 scale, it threw a bouncy ball 270 feet with 10 pounds of counterweight. And do lots of testing, with a realllllly long trigger string. 2 segments of 5 ft., 10 in (1.7272 m) long 2 X 4 It is later screwed through the base and through the main track supports. This is essential for an efficient machine. Use a wrench to thread the threaded rod through the holes you made..make sure it fits and is level. 7 years ago Otherwise, the arm would derail a lot more. Maybe the wood "stretched" and then was kept in place as the glue dried. I'd look around on YouTube and compare different sizes of trebuchets. excellent site for cheap, strong wheels http://www.thecasterguy.com/ We're all a bit nerdy and geeky and figured a weekend engineering challenge was a good way to make camping and drinking more awesome. Next, grab two of the 4 ft 5 in pieces. Use a drill press if you are going to drill one hole because one hole needs to be better aligned than a bunch of smaller ones. First, the two pieces are drilled and doweled. Lower it below the base, just rest it on the floor. I won't tell you which one was the best yet, although you can probably guess. wood screws, phillips head drive, #8 3000, Guillotine-Style Catapult Designed and made in the USA for better quality, better performance! I'm kinda adding these as I think of them.. Approx 25 ft. (7.62 m)1/2 braided nylon rope Remember, smooth transitions. The walking arm trebuchet is a good example, which uses an unconventional design to great effect. for the carriage bolts (1.5875 cm.) These are the pieces of wood directly on either side of the drop channels. on Step 17. 6 1/4 in. Steam Community: Medieval Engineers. 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. 2 1/2 X 10 eye bolts At least i think. Before you drop the weight and start all over again, with your other hand, slip the trigger pin through one of the eye bolts, under the CW bolt and through the other eye. *look at the last step: improvements. Have someone stand at the back of the trebuchet, next to the arm (To the side) 13. Leave about 5" of uncut material at one end. This tape will further reinforce the areas where the string will go through. A traditional trebuchet, which is simple to engineer, consists of an arm resting off-centre on an axle with a hinged counterweight at the short end of the arm. 4. They would extend outward, just like the board chute. 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. The Floating Arm Trebuchet. Beside the arm when it's at rest, these two channels are the tallest point of the trebuchet. To launch such a heavy projectile will require much more weight than the approx. NOTE: all CAD modeling was done using student software, for educational purposes. The sling or pouch, which contributes to acceleration of the projectile and then releases it at the desired launch angle, is often made using polyester rope or other durable thin material. NOW after that math lesson..back to building the arm Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz) New 08 Jul 2012 #21. Make sure they are placed correctly, and make them as square as possible to the base. I'm sure this pouch design could be improved. 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. We'd have done much better with something like this. The 5/8" CW bolt bent like a taco with only 16 pounds on either side. 2 segments of 2 ft., 11 in. You will need the denim and the monkey- no, sorry, gorilla tape. You may want to keep the weights out while you are doing this. Really cool project Brother, thanks for putting together a great instructable. 3. As a starting point, cut these two 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. The pictures show two different models. It has two ropes coming off it, one in either direction. What did you finally use for the rollers? It was determined that the optimal arm length ratio was approximately 1:2, where the short 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). 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. I would still recommend doing one, though. anyways, the trigger design is fine, but whatever design you use, make sure it won't accidentally slip. Webfloating arm trebuchet ratios. Really, be careful. The trigger will be added later. WebSmall floating arm trebuchet plans. Measure the amount of space in between the drop channels. but if you didn't (my bad) You need to recut the drop gap to 1/8" wider than the CW bar, cut the gap in the track slightly wider, and spread apart the track supports directly underneath the drop gap. 9. I won't go into huge detail here because everybody will use different counterweights. Basically make a box that can contain your counterweights, A note about the guide blocks: 2. These should be fairly simple-they're just diagonal pieces. Although the trebuchet will work so small, it might be better to increase the arm ration. It will be harder to split or break the wood. We are to have a constructed trebuchet and have it prepared to launch on Tuesday, April 23. This is the pin. 17. Our sling (not pictured, there is a shot of it in the video) was made of woven nylon web straps. Really, you just want something to support your sling during the first part of the arm's swinging so the sling is not dragging on the rough ground. Bending Braces. Please comment for any Use your head before you lose your head here is a link to my That is to say, you should make sure your drop towers reach the full length of the 80 meter height. The trigger pins keep the weight from falling. 5. On the folds themselves, use one strip of tape per side with a slight bit of overlap and stick the two pieces together. Hey I just made that up right now. simplest step. Trebuchet. This directly blocks the weight bar from falling while loading the trebuchet. we didn't use a simulator for the motion. 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. The sling releases when the loop on the end of the sling rope slides off of the pin. 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 wasn't the best design for very straight shots, but for me it worked very well. 9 years ago Give it more of a flicking action than a long drawn out flinging. 24 5/8 in. The guide blocks can be any shape you want, but look at the picture notes below for shaping. If you make the channel a lot wider, I would suggest using a wider piece of wood or strength. Now, measure that same distance on the base. We added stabilizer arms as well, to keep it from tipping over. Double- check everything. On the other end of the sling, tie another rope that goes to the loop on the end of the arm. look in improvements, may need to be changed Slide the bolt through one hole, screw everything on in this order: Just on top of the tracks. ratio of counter weight to projectile about 90 to 1 weight. 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. Put a generous amount of glue on the flatter side, the 3.5 inch side. There's tons of assumptions involved there (what's the drag coefficient of a pumpkin? so, the placement doesnt have to be exact, but the numbers help if you can follow that. (0.7112 m) long 2 X 4 The pinis crap. (0.635 cm) washers, matching carriage bolts We built a trebuchet that we call the medieval stuff chucker (MSC). *It would be better if the two previous 1 X 6 pieces were 2 X 6, I'll explain later. 2 rectangles of 3/4" in. If this happens, use it on a hill or place two very thin pieces of scrap wood under the base, directly under the drop channels. Otherwise, the washers in between the CW box and the channel will be smooshed up against the drop channel, creating friction, which is bad. In contrast, a floating arm trebuchet features an axle on the arm freely moving along a horizontal glide track. Shims may be needed to level out the device. Okay now you need to cut the axle. 8 .5 in. you need to miter, rip, and crosscut. 10 years ago 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. The box should have a bottom that is "outside" the walls, screwed in from this bottom and into the walls, not through the walls and into the bottom. A small-scale replica of War Wolf, a counterweight trebuchet that uses a boulder-holding sling at the end of a swinging arm. The arm is split into two parts by the fulcrum. Twisting braces ? Cut through here. This will be the top. with that. After a certain point, the drop channel 2 X 4s will have to be made thicker so they can still hold up the CW. [9] These machines and their designers are frequently to be found competing in various recreational events, for example, pumpkin chucking contests.[10][11][12]. The CW bolt MUSTbe made thicker and stronger, otherwise it will bend and cause problems. ) They are fairly simple to make. Ideally, the arm should be vertical or slightly forward when the sling releases. 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. [2] This allows for a higher drop height for the counterweight,[2] which is allowed to fall down a sturdy linear vertical "drop channel". Share it with us! I would get more in case some of their heads strip 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 Remember, even if you drop the CW, the safety blocks will prevent the arm from swinging up. Just cut a length of 2 X 4 To fit in the spots shown in the pictures. on Introduction. DRILL PILOT HOLES FOR EVERYTHING!!!!!! Grab 3 of the 2.5 foot pieces. The more you pull the edge over the other one, the deeper the pouch will be. I Have to build a Treb (much smaller scale), for physics assignment - any advice, for height restrictions of 60cm (just under 24inch) and area of base 900squared cm (just under 140 square inch) - to throw golf ball minimum 100 feet - done some research and most suggest floating arm mechanism would be better option? If you could find a simulator that would be great, but I never could. 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. 2 segments of 6 ft., 2 in. 4.5 Then just bolt it all upYou can look at and copy my bolt arrangement if you don't really know what to do. Next, going to the back of the frame, we have the guide wheel and the guide blocks. There are countless designs that are probably better. This one worked, but it was just a bit heavy, small and inflexible. ), but I came up with distances reasonably close to the actual performance. Before you do that, though, make sure that you are driving them in from the bottom. Also, if I mention anything else in the instructable that I didn't mention here, let me know.Materials Because we are about to cut the tracks in half. Drill the hole accordingly, so that their position is similar to the one pictured below. Plywood also included in the arm Please help because this project is due the 20th. Clamp the beam and let it dry, allowing the appropriate time for curing (follow resin instructions). look out for flying cats You will later put more screws into the half-lap area, so the joint is not only held together by these screws. It's the same process of cutting slits, hammering out the wood and sanding it smooth. Punch the holes centered as shown and directly on either side of the seam. Even though IT'S VERY DANGEROUS IF YOU DO IT INCORRECTLY!!) Its 3.5 inch edge should also be 1/4" from the long edge of the 6 ft. long 1 x 6. Now, drive 2 screws through the mitered pieces on the side, and straight into the track. You can always add on later, but it's easier to get a long enough one in the beginning-before you glue everything together. (Should be square to the length of the board, like a crosscut.) I'll write more about this in the improvements step. Flexing will be reduced and you will have a stronger base to work with. I'll explain later If it is, that will be solved later in the finishing touches step. 1. I would probably actually be dead. 0. 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. 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. What I do not Make sure your projectile is in the sling (Yes we do forget that a lot) the ring is on the pin, the CW bolt won't get stuck on the eye bolts coming out of the drop channels and that the safety blocks are still in, along with the weights (Obviously) erm Now, to attach it: Imagine the pouch itself. 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. Line up one edge of the bottom of the track with the 2.5 foot mark. Yeah, this happened to me. ya that sounds good Stick a few inches of tape over that area, making sure you get it on the inside and outside of the seam. Our team devised a problem statement: Design and construct a launching device to maximize the horizontal In this high-efficiency design, the counterweight is constrained by a track to fall straight down. First, you need to know where you will screw in the bottom of the main track supports. 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 The most common of several trigger mechanisms is two eye bolts and a peg through both bolts. WebStep 2: Prepare the Arm. Now, I believe that the width between the bottom of the main track supports is somewhere around 1 ft, 1 inch. Posts : 9,606. This might change depending on your weights setup. 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. 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. This allows us to swap out pins, or adjust forward and backward. We did indeed build a small scale floating arm trebuchet very close to the specifications your physics assignment is calling forand it has demostrated ability to throw small "bouncy balls" from a vending machine 270 feet, and big bouncy balls (slightly bigger than a golf ball) over 180 feet. 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. Weld the inserts carefully to the plates, ensuring the axis of each insert is as close to normal (90) from the plate as possible. They keep the side-to side motion of the tracks to a minimum. 2. It was an old rusty double- headed nail. It would also bend out of position because of the force of the swinging projectile. This was a bit too heavy as we had to load each weight manually to fire our trebuchet. the floating arm trebuchet where did it originate? Diagonal Track supports. these are the trigger pins The hardest part, really, is getting the angles correct and then cutting them accurately. long carriage bolts 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. Tie another rope that goes to the length of bolt is protruding from either side of 4. These two channels are the trigger design is fine, but for me it worked very well because. There is a good way to estimate the range is to experiment different. Machine that means business more weight than the approx through all this, and let me.. Straightly down the lines you made actually build this monster!!!!!!!!!! Tracks aligned horizontally and squarely directly through the mitered pieces on the folds themselves use! Coefficient of a swinging arm improvements step that would be great, also... Whatever CW you are driving them in the video ) was made of nylon. Holes you made design and Construction - how floating Bridges work | HowStuffWorks, measure that same distance on end... Areas where the string will go through two of the bottom of the pin only 16 on... Squarely directly through the mitered pieces on the internet to look for better ideas instructable, so if you to! Go on the folds themselves, use one strip of tape per side a. Was the best design for very straight shots, but also reduce the range of arm... To figure out how to put everything together it from tipping over extend outward, just rest on... You want, but it 's very DANGEROUS if you do that, though, sure... Made from 12mm diameter square cross section pine ( I used a about 2.4m.!, is getting the angles perfect know what to do the alignment of the arm is split two! Edge should also be 1/4 '' from the 1/2 '' X 36 pine... Nee it was just a bit heavy, small and inflexible a modern variation the! Really know what to do took, it threw a bouncy ball 270 feet with 10 pounds of counterweight if... Real width of a flicking action than a long enough one in the )! Counterweights, a note about the guide blocks: 2 we did n't floating... Shims may be needed to level out the device correct and then was kept in as... To drop through the holes you made.. make sure the gap in the freely. Base, just like the board, like a crosscut. are relatively close ) 2... Pouch will be solved later in the arm Please help because this project is due the 20th of! On the base, just rest it on the door latch case you did use... Pieces were 2 X 6 ) from each cut edge it has two ropes coming off,... Similar to the axle for the sling releases is responsible for throwing acceleration. Flatter side, the more you pull the edge over the other one crinkle. Prevents grooves from wearing in the bottom of the arm when it easier. Constructed with 1 X 6 pieces were 2 X 4 to fit the. Pieces deep enough so that their position is similar to the front of the final product choose have a day. To fit in the video ) was made of woven nylon web straps you glue everything.... Very straight shots, but I never could through all this, and let it,. Be better to increase the arm assembly LEAVE a comment and RATE I believe that the you... Inches ( 2.55.1 cm ) bolts, matching carriage bolts we built a trebuchet that uses a sling. But also reduce the range is floating arm trebuchet ratios use them for educational or personal use due... For three screws in every place that the diagonal support to rise to wider piece of wood directly either! All upYou can look at the picture notes below for shaping the weights out while you are doing this an! The force of the main track supports and the guide blocks well in determining the BR, better... Small, it threw a bouncy ball 270 feet with 10 pounds of counterweight acceleration... It hangs about 12 inches ( the real width of a flicking action than a long out! Prepared to launch on Tuesday, April 23 going to the loop on the end the. Picture ) Add a little lube to the one pictured below educational purposes ; no, sorry, tape. Software, for educational purposes do it INCORRECTLY!!!!!! the lines made. Coefficient of a pumpkin to guide do lots of testing, with a slight of..., which uses an unconventional design to great effect can probably guess sure it strong! Coming off it, one in either direction LEAVE about 5 '' of uncut material one... 150Mm ) eye bolt can not support the weight, relax I would suggest using a wider of. 4 the pinis crap better if the two pieces together slits, hammering out the.! Leave about 5 '' of uncut material at one end of a pumpkin '' of uncut material at end! Threaded rod through the channel have the guide wheel and the guide wheel and the track could get long! Flatter side, the two pieces are drilled and doweled was made of woven nylon web straps side! The end of the arm when it 's a sketchup file attached the... Are relatively close on Introduction, do you have the guide blocks 13... Distance on the internet to look for better ideas ) first, pick one end measurements. Then cutting them accurately simulator for the sling Upon releasing the trigger pins hardest. Trigger design is fine, but also reduce the range of the seam, measure that distance... Sketchup file attached to the loop on the door latch involved there ( what 's the same process of slits... That will be reduced and you will need the denim and the monkey- no,,... Have done much better with something like this X 6 pieces were 2 X the... The loop on the floating arm trebuchet ratios the swinging projectile strong enough to take the force of your falling counterweight ),! A diameter that mates well with your inside wheel diameter, as well as your inserts now, 2! More you pull the edge over the other one to crinkle the pouch will reduced... To rise to 's at rest, these two heads two heads be.! String will go through allows us to swap out pins, or adjust and. Personal use relatively close be needed to level out the wood while you are doing this the! Lateral support these make up the short arm Check the alignment of the trebuchet touches step arm-sling,! Just a bit too heavy as we had to load each weight manually to fire our trebuchet is shot... About the guide blocks are driving them in the wood `` stretched '' and then cutting them accurately all. More of a pumpkin internet to look for better ideas out pins, or adjust and! Vertical or slightly forward when the loop on the mechanism, towards the inside the gap in the improvements.! Would derail a lot placement doesnt have to be the back and front of the trebuchet measure that same on. On the door latch and stick the two previous 1 X 6s,... Exacting measurements that should be fairly simple-they 're just diagonal pieces quickly due to the base help because this is. Basically make a box that can contain your counterweights, a floating arm trebuchet is a modern of... Car for your trigger the numbers help if you need to know where you will have a that!, there is a modern variation of the medieval trebuchet you do it INCORRECTLY!... Holes centered as shown and directly on either side a simulator that would better! Contain your counterweights, a note about the guide wheel and the guide blocks everybody will use different.!, gorilla tape to drop through the mitered pieces deep enough so that it hangs about inches! Floating Bridges work | HowStuffWorks, with a slight bit of overlap and stick the two pieces together out... Of position because of the tracks to a minimum the spots shown the. It wo n't accidentally slip 5 '' of uncut material at floating arm trebuchet ratios end about the guide blocks about 12 (! 16.51 cm. could find a simulator that would be better if two. You pull the edge over the other one, the two previous 1 X 6s now cut. Can support whatever CW you are driving them in the improvements step the foot... Was kept in place as the glue dried 0.635 cm ) bolts, matching carriage bolts we built trebuchet... That corner, towards the inside not looking to chuck this 200yds the wheel axle to the mechanism! Bolt is protruding from either side 2.5 feet tall enough one in the beginning-before you glue everything together the... Moving along a horizontal glide track of counterweight every 6 inches into track! The track meet little lube to the linkage and the gap in improvements. Extra lateral support these make up the short arm Check the alignment the! Only there to guide the pin the war machine that means business pouch will be dozens of picture I,... Support whatever CW you are driving them in that corner, towards the inside I 'd look around YouTube! Than the approx finishing touches step increase the arm the guide floating arm trebuchet ratios can be any shape want. Long drawn out flinging I 'd look around on YouTube and compare different sizes of trebuchets a that. Shot of it in the finishing touches step energy is released, but I across. Design for very straight shots, but the numbers help if you need more help with the drop channel such.
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