Catapults Research Papers

To fire it, the spoke or arm was forced down, against the tension of twisted ropes or other springs, by a windlass, and then suddenly released. As the sling swung outwards, one end would release, as with a staff-sling, and the projectile would be hurled forward. The arm would then be caught by a padded beam or bed, when it could be winched back again. The Onager is usually the first type of catapult

A trebuchet is a siege weapon most commonly used in the middle ages. It uses gravity to propel an object. There are competitions held today called "Pumpkin Chunkin '" which use trebuchets to launch pumpkins as far as possible. The common question is what the dimensions should be when making it. Should the arm be longer or shorter? Should the counterweight be heavier or lighter? These questions have been asked by competitors in trebuchet competition as well as engineers. And this is why the project is in the field of mechanical engineering.

Objective: Using a marble launcher, launch marbles from different angles with different forces to find the maximum height and the velocity as it leaves the launcher. Using different variables and results to determine how the different angles and amounts of force effect the variables. With this data show the effect the forces cause in 1-D and 2-D motion, as well as in the X and Y directions. This is done through kinematic equations and calculations.

This second edition of DeVries and Smiths’ book, Medieval Military Technology, encompasses many of the weapons, fortifications, vessels, machines, and armour developed throughout the medieval period, to provide a brief cultural history of the relationship between military technology and medieval society. DeVries and Smiths’ purpose in compiling this book was to lay out their argument in a way to which the reader can understand the purpose of medieval military and its relationship to society. The central

A Trebuchet is a weapon used during the medieval ages in siege warfare. The trebuchet was used for the defense of towns, strongholds, and cities. First the materials used to build medieval trebuchets. Second the origins of trebuchets. Third how trebuchets were transported.

Trebuchets are most commonly known as medieval weapons used in the Middle Ages. Us three were to build a smaller scale of the trebuchet and had to make sure it hit the target two out of the five times. We had to build a hinged-counter weight type of trebuchet with wheels that could throw a ping pong or golf ball. Through the paper I will explain the history throughout trebuchets and why to have wheels and to have a hinged counter weight on the trebuchet. Also the calculations on the potential energy and velocity are through this report. Our trebuchet met all of the requirements that were to be made and it hit the target three out of the five times. This report will

From the beginning of humankind tools have been used for the use of survival and livelihood. One of the most useful but underrated tools ever invented is the tomahawk. It’s humble beginnings go back thousands of years to the days of wood and stone. The most underappreciated form of this tool is the pipe tomahawk. A history both complex and exciting, the pipe tomahawk and the DeQuindre tomahawk both hold great interest to share, such as design and bloodline.

The first records of counterweight trebuchets began appearing in the 12th century. Proving to be an excellent siege weapon, many militaries began using this. Though stone-throwing artillery had been employed by both the Greeks and Romans, they were usually powered by torsion or tension; the trebuchet was the first war machine to use gravity and leverage to fire projectiles. They were used widely during the Crusades, in which the European militaries, especially the French, used the trebuchet to lay siege to Muslim cities in the hopes of capturing the “holy land.”

In light of our final exam, the chuck a duck project, we are to learn about projectiles, trajectory, and the factors that affect these things.

Ever thought about that one wall that you wished was never there well know you can with this easy weapon called a trebuchet is it cheap and easy to put together, it is not very dangerous so don't let your parents tell you what it is and isn't take up your trebuchet that you built and take control

For example if the fulcrum was to be to close too the lacch it would most likely hit the ceiling. Also, if the fulcrum was too be too far from the launch it would also hit the ceiling. The best location for distance when launching the snowball was 3 fifths of the beam away from the launch. This location made it too where the snowball gets distance and some height so that the snowball doesn't hit the ceiling and comes back down and goes really far but luck wasn't on our side for the competition. 2.Explain how the speed of the effort and the amount of effort applied changed the flight of the snowball.

When we think of catapults we usually imagine them firing at castle walls during the medieval times, or standing in the background of a large army clashing with another in an action movie. However, catapults have a long and intricate history that twists and binds with our own, dating all the way back to 399 B.C. First documented by the Greek historian, Diodorus Siculus, in the form of an early design for the Ballista (type of catapult). Catapults were a staple for siege warfare all throughout history. The catapult was used by many different cultures, notably the Greeks, Roman, and Chinese in siege warfare; also

This was used to calculate the launch velocity and various angles. The calculations for this, shown in Appendix 1, are somewhat reliable but may be inaccurate in some areas. The theoretical calculation for output force from the trebuchet arm was calculated (Appendix 3) and the result was compared to the result from the

These equations were derived from using d ⃗_y, the axis of symmetry, and a point on the parabola. It is necessary to have a known point on the parabola to determine the stretch of the parabola, defined as s. In the equations above let u define a point in vertical direction and h define a point in the horizontal direction. The point used in order to calculate the equation of the parabola that models the behaviour of a waltz jump was (1.61, 0). This point is used as 1.61m is where the skater lands on the ice, which is where the parabola model ends, and the ice is the horizontal plane defined as zero. Below h is defined as the horizontal distance, and u is the vertical distance.

* The relevance of this experiment is similar to understanding a real airplane. Paper airplane models are derived from an actual plane these days. The design of an airplane has so much to do with distance, hang time, speed, and many other factors. Understanding the models I have chosen to make help me