Catapult: Physical Aspects Of The Parts

There are many approaches to this problem. The most common method is creating a separate air chamber using an empty soda bottle. A weight drops on this bottle to exert air pressure. This air pressure is then used to launch a projectile, adjusting the height of the weight as needed. Although easy, this method is too imprecise and will yield inaccurate results. To begin, it is needed to learn about how air pressure is created and the best way to achieve it. After

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.

“Brian explained how we could make a catapult… …by piling rocks on the mattress and rigging it with ropes looped over tree branches. When [Ernie] came within range, Brian gave the word, and we jerked back on the ropes. The mattress shot forward, and our arsenal of rocks flew through the air. I heard them thud against Ernie’s body and clatter on the road. He screamed and cursed as his bike skidded” (Walls 166).

It was built of oak, it's bottom clad was made of copper, and it had three masts.

Fourth the ancient trebuchet King Warwolf. Finally the end of an era. The materials used to build the medieval trebuchets. The early trebuchets were made of straight, heavy oak logs.

The earliest trebuchets were ‘traction trebuchets’, which were developed in China in the 4th Century B.C.E. Traction trebuchets used human labor instead of a counterweight for power. The Chinese needed so much power for the trebuchet that they had up to 250 soldiers pulling on ropes to operate the machine. This machine could throw stones up to 100 meters, but was not very accurate, because of the inconsistency in using manpower.

The trebuchet doesn’t date back to a specific person, or date. However it is seen as early as the 6th century. In the 6th century, China used a trebuchet-like idea of humans pulling ropes on one end to catapult an object on the other end. The known trebuchet design was created somewhere during the 12th period, and once created it was seen everywhere. The trebuchet was built during this medieval time period because it was extremely difficult to get over castle walls, or to break through. The purpose of the trebuchet initially was to do this. There are four basic parts to the trebuchet: the frame, the guide chute, the beam sling, and the counterweight. The trebuchet was created in a crucial time period because of its purpose. It succeeded greatly

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.”

Post and Lintel Construction is made when giant structures are standing upright; these are called the posts. The lintels are the horizontal structures that are placed on top of the posts. The main structural limitations are the lintels cannot be extremely heavy and they have to be well supported by the posts, or else they can fall down. The most popular example that is also in our text is Stonehenge on page 18.

The physics concepts associated with them are projectile motion, energy, momentum, forces , speeds, and distances. The kinds of catapults all use the same theme of accumulated tension, but acquire that tension in their own way, their own design. The Mangonel catapult for instance, is what most of us think of as the traditional catapult. A large wooden device with four wheels and a spoon that launches fireballs. The Mangonel stores energy much like a spring would, therefore, we use the equation PEspring = 1/2kx^2. The tension in the ropes and arms of the catapult when pulling on its long arm stores potential energy which is transformed into kinetic energy when fired upon.

The wood used was drift wood, and was steamed and bent into the prefered shape. The pegs to hold the ribs in place were made out of specially selected driftwood or caribou antler. The seal skin was removed from any hair, dried, and then soaked in urine and rain water to make it flexible enough to sew. Then the skins sewn together with sinew on the outside, and then re-sewn on the inside with dried beach grass to make sure it was waterproof. The skins are then lashed onto the frame and then oiled with seal oil and then caulked with a mixture of moss and seal oil. (Delta Discovery)

What kind of materials did the castle used? The main materials that were used were just stone and wood, the defensive wall would be stone,

This problem is asking us to Bungee jump our Ken from the balcony in the library located at MCLC. It is also asking to write an explanation that describes how you can predict the number of rubber bands needed for ken to bungee jump off the MCLC library balcony. It also asking to show and protect our answer.

Rigid material is used to withstand deformation and vibration caused by the lever for designing the beam of the mechanism [7].