Trebuchet Simulator To aid designers and enthusiasts (and anyone who wants to win a trebuchet competition), I created a trebuchet simulator, programmed in Microsoft Excel which simulates the motion of a trebuchet, and is very useful for trebuchet design. It captures all the essential. And if you wish to build a trebuchet yourself, this trebuchet software program allows you to optimize the dimensions of your trebuchet for maximum throwing distance, and also allows you to determine the required finger angle which results in the trebuchet releasing the payload at the right time, for maximum throwing distance. The required finger angle is based on the friction between the finger and ring. See the link above for an explanation of finger angle and ring.
A user manual in PDF format is included with the Excel program. The simulator is straightforward to use and since it is programmed in Excel the design data is displayed automatically in charts, for easy reference. The figure below shows an example of a chart in the Excel spreadsheet, which shows range (throwing distance) as a function of release time. Below is a screen capture of the Excel spreadsheet. With the simulator you can also:. Choose whether or not to use a guide chute.
Calculate sling tension, and the reaction forces at the fixed pivot location of the beam (to which the sling and counterweight is attached). Accurately predicting the motion of a trebuchet requires a lot of complicated mathematics. Having a software program, like this simulator, will save you a lot of work. All the files that come with this trebuchet simulator are contained in a single (compressed) file, in the 'zip' format. This file is 2.4 MB in size. You need to uncompress this file before you can access it. To use the trebuchet simulator program you need to have Microsoft Excel installed on your computer.
The program is compatible with all versions of Excel. The cost of the Excel program plus manual is $7.95 USD, and is payable through PayPal. To purchase, click on the link. This will open another browser window, which will take you to the PayPal site. From there you can enter your purchase information, and then download the product.
Support is available if you have any questions or need assistance with anything. You may email me via my. My alternate email address is:. If possible, write me with the same email address that you entered in the purchase form. This isn't necessary but it just makes it easier for me to confirm that you actually purchased the product. If you didn't purchase the product your support questions will go unanswered.
Since the simulator cannot be returned after it is downloaded, refunds (if requested) will be determined on a case by case basis.
Proposal: We are in a high school engineering program and we propose to build the best trebuchet with a pivot point under four feet the world has already seen. We will work on this project for about a month. We will build, test, evaluate, refine and continue to make it better. History: The trebuchet dates back to the middle ages where they were used as a siege weapon.
On average these machines could fling material of 350 pounds onto an enemy territory. Unlike now, the humans pulled ropes instead of having a counter weight. Today they are used mostly for recreation and education. Step 2: Material, Tools, and Safety. When we were first assigned this project we had to go through so many options and learn about so many new mechanics.
It was a very intense time, since we had so little of it. From the beginning we had wanted to build a trebuchet, so that was the primary objective here. We compared the abilities and mechanics of trebuchets to catapults at first, and we were convinced trebuchets were the way to go. Then the delving began, after much research, we finally found the information we needed to have the perfect trebuchet.
Trebuchet Calculator Programs
(It will be given references, before we turn it in.) Then we took into account the limitations the rules gave us and pushed everything to the limit. With a pivot height of 48' to the dot, we then put together an 8' arm with the pivot point placed in the spot we felt was the best after some math. The frame was built around that, we gave the length 2 6' 2x4's and the width 2 28' 2x4's. With the brace's height's only limitation was our mitre saw's angle of 50ยบ, we put brackets in the corners and we had a trebuchet frame.
For our design we used SolidWorks to build it virtually. After that we used both SolidWorks and a to test. Our SolidWorks Parts. The first part of the trebuchet we are putting together is going to be the frame. The lumber we will be using is two 28' inch 2x4's, two 5' 2x4's, two 50' 2x4's, and four 58' 2x4's.
For hardware we used 2' wood screws. We will also use plywood as support trusses.
Don't forget to drill 1' 1/8' holes on the 50' pieces of 2x4's. Remember to use a speed-square to keep everything lined up correctly. The frame serves to keep everything in place and should need little to no maintenance after construction (we had to do a lot of maintenance.) Since the frame will also take on most of the strain, you want it to be solid. This means no shortcuts when fixing planks to one another. When starting on this project, you want to make sure all of your cuts are straight and correct, your corners should be squared off, and minimize mistakes.
Download updated foxconn n15235 motherboard LAN, Audio,video,vga,lan,network,ethernet Controller drivers For windows 7,8,xp to boost up your computers performance. Foxconn n15235 motherboard drivers xp free download, GetGo Download Manager 4.8.5.1687, GetGo Download Manager 4.8.3.1545, Style XP Men 3.19. Free motherboard foxconn n15235 lan download - motherboard foxconn n15235 lan driver - Top 4 Download - Top4Download.com offers free software downloads for. Foxconn N15235 Drivers Download. And ask for help from our community on our Free Driver Help. Board sound driver for windows XP' p4m800p7ma Driver Foxconn. Oct 05, 2011 I want to install Foxconn N15235 lan driver in trixbox. Please help me... More about foxconn n15235 driver free. Free LAN driver downloads for xp. Foxconn n15235 lan drivers xp free download.
Step 5: Building the Frame Part: 1. The arm is one of the most important parts of the trebuchet. To make sure ours is perfect we measured twice, cut once, and made sure to be perfect. To get perfectly aligned holes we used the drill press. We made some of the holes exactly the same size as the bar then sanded them a little to reduce friction on the pivot point of the arm and the bar.
Start off by measuring 1-3/4' from one end. Make a mark 1-3/4' from the side of the 2x4.
Make a second mark 20' from the same end that you measured for the first. Take your arm to the drill press, if available, and make 2 1-1/8' holes at your marks. Step 9: Adding the Arm Part: 2. Trusses: We added support trusses where the support beams meet the 50' bars to add even more support.
We highly recommend this structural support. Sling: For the sling we used a canvas bag material. We also recommend using 550 paracord since it has the best fitting characteristics to our project.
We also found adding grommets to the holes where our rope was tied to the sling, since the force tends to tear through it rather easily. We based our sling from but then made a few modifications to make it better. Guide Chute: With the chute, we diverted from the original blueprints due to time constraints and were happy with the end result as it allowed our arm to have more clearance on the wights we added, which in turn gave us more flexibility on our trebuhcet. Quick Release: Mount 2 Eye Hooks to the center of the frame where the arm falls. Mount the last Eye Hook on the arm between the two you added to the frame.
Release Pin: The pin's angle is an essential piece to your trebuchet. We used a rectangle pin because it only has two points of contact. Frame Braces: Where we saw wood splitting, we handmade braces out of metal to release some of the stress. Step 13: Step 6: How to Fire. Drawback the arm and ready it to fire. At this stage you want to make sure that down range is clear and keep in mind safety, these were designed to break down castle walls, the bones in our body are no comparison to those walls.
Arm your quick release by setting in the pin and running the rope back to where you will be standing. Put your projectile into your sling and keep it taught, with your ring on the release pin. Put your weights on to the bar and get ready to fire. Stand beside the trebuchet, not behind it in case there is a misfire, and pull your release cord.
Watch it fly! Step 14: Paint.