floating arm trebuchet pros and cons

Reply Im going to try to attach an image of this fine litle machine if i can...im not an expert at this. 6 years ago This makes the arm much stronger than regular lumber, allowing for more counterweight, larger projectiles, and a stiffer, more efficient arm.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.Use a door release mechanism from a car for your trigger.

Jul 9, 2018 - Explore sogambler's board "Trebuchet and Catapult", followed by 108 people on Pinterest.

Reply The picture shows just 4 pounds of counterwieght, we added up to 10 pounds for maximum throws. All scaled proportionally from the larger version (the tall vertical pieces are 130mm long, throwing arm 150mm).



A long wooden arm with a basket at the end was fastened with a system of ropes and gears to a strong wooden platform, which was mounted on wheels, enabling the trebuchet to shoot a projectile, such as a barrel of liquid fire, placed in the basket a long distance. 6 years ago Some (such as duckweed and salvinia) can get out of hand; I have found in tanks with a lot of duckweed or salvinia that if you put your hand in the tank your whole arm comes out covered in duckweed or salvinia; Sometimes floating food gets stuck in it and the fish don't notice; They reduce light getting to other plants

About: Mechanical Engineer in the machine design industry. Hey Chans2901, Thanks for your questions, I love trebuchets! Do you have any instructions or tips perhaps? 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 arm is 18 feet long, we use a 1.5 inch steel bar, and can load it up to about 800 pounds.

we didn't use a simulator for the motion. The floating-arm type is distinct from the ordinary trebuchet in that its arm has no fixed pivot; that is, it “floats” during a launch. Hi, read your comment, Need some advice please, if you don't mind.


Axel for the masses is coathanger wire but ensure the axel never absobs the full impact of the falling masses as it will bend. on therobotichand, would you mind posting any materials or tutorials you used? 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. I would greatly appreciate it if i can take a look at it. How to build the backyard ogre catapult. A f2k trebuchet has an arm that rides on wheels, which roll forward on rails, while the weight bar running through the arm falls down in a vertical groove.

Reply 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? As far as we know, its the largest floating arm ever built by youths, and the largest wooden floating arm trebuchet in existance. Wheels are from the rotating platform from a microwave but any small stong wheel will do. As it turned out, our design was over built and held up well. Yes I want a small one for the classroom and large one for the field.

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. We added stabilizer arms as well, to keep it from tipping over. We launched objects across our backyard. I like things that go boom and sushi, preferably at the same time. 3 years ago Really cool project Brother, thanks for putting together a great instructable.

5 years ago A good way to estimate the range is to use conservation of energy. I came across a problem for the quick release.
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.Here, we followed the dimensions on the drawing and cut very precisely.Our arm was made of many pieces of layered plywood held together with resin and deck screws. on Oh man that is awesome. 5 years ago We are building one now, it has been lots of fun for the family. We actually did not have motion software, we just looked at lots of YouTube videos. In response to urbanmx, this was our very first trebuchet. on Hi, I looked it up, and for floating arm trebuchets the weight-projectile ratio tends to be about 1:50.I'm using this kind of trebuchet for an assignment, and the ratio of our weight to out projectile is about 1:200. would this kind of trebuchet be better in this case than a traditional trebuchet?

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