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Catapult:
With the arrival of fortifications such as forts, strongholds and gigantic walls to protect cities from hostile forces, conquering cities became so difficult and costly to do that every civilization must come up with an ingenious way to overcome this problem. Out of all methods ranging from complex engineering feats such as the siege tower to simple methods such as employing ladders, none are as well-known or as old as the catapult.
The catapult is a siege engine that propels a variety of projectiles, it’s one of the first method to overcome to the problems posed by fortifications.
The first catapult was invented around 400 BC in the Greek Town of Syracuse. The leader of the townspeople, Dionysius the elder orders the research and development of weapons to prepare the colony for a long war with the Carthage, one of the weapons devised is called the Gastraphete, similar to the crossbow but a greater force must be exerted to release of a larger and more powerful projectile. The Greeks were so impressed that they persevered to develop a bigger and more powerful version of the Gastraphete called the ballista. The Romans took inspiration from the Greeks to create their own catapult, within a few years of development, the Romans have successfully created the mangonel as a lighter alternative to the ballista and wheels are added to increase mobility. Unlike the ballista, the mangonel is less accurate although has a superior range and can hurl projectiles weighing up to 200 pounds. The mangonel reached Europe during the medieval era and was used extensively by the French. It was then introduced to England in 1216 when the French besieged Dover. The mangonel was later refined by the French into the first version of the catapu...
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...orking trebuchet of medieval design today is at Warwick Castle, which is used as a tourist attraction and is fired by members of the public under professional supervision. It stands 19m tall and uses a 6 ton counterweight to fire 15kg stone balls distances exceeding several hundred feet. A modernly designed trebuchet, called T-Wrecks, can throw pianos weighing 250 kg over 100 m. In England a group of farmers threw a car close to 122 m and a 55 gallon drum filled with gasoline over 300 m.
Although he catapult is no longer an effective weapon of war, it still arises a considerable amount of questions, how are people from the past able to think of a machine more complex than anything that could possibly imagined at that time. The creation of this weapon requires very precise skill and work, this only goes to show that we can be much more innovative than we already are.
After observing Gothic cathedral, you begin to notice the tall walls of stone and stained glass windows. Construction a building of this nature took a lot of architectural design, time, and hundreds of workers. Back in the 12th century, they did not have the modern technology that we have to build cathedrals in less time. In France, they have created a prototype to determine techniques used by worker to build of such a building of architectural design. In their findings, they discover that builders used a Roman war engine hoisting machine or “squirrel cage”, to assist workers with lifting six times their own weight. This method was very difficult as one worker described in an interview, because the “squirrel cage,” often slowed down due to the heaviness of the stones. In order to keep the wheel spinning, the workers had to speed up to ensure that the stones would not fall out in mid-air and cause harm to other working on another s...
CATAPULTS The catapult, was invented by the Romans, and plays a large role in the siege of any castle. Besiegers could fire 100-200 pound stones up to 1,000 feet. The catapult was used to destroy buildings and walls inside and outside of the castle walls, it could also destroy an enemies moral by throwing severed heads of comrades, they could spread disease by throwing shit and dead animals in, and they could destroy wooden building by throwing bundles of fire in.
First the energy of conservation. The setting of the trebuchet before firing is shown in Fig 1. A heavy counterweight of mass (M) (contained in a large bucket) on the end of the short arm of a sturdy beam was raised to some height while a smaller mass (m) (the projectile), was positioned on the end of the longer arm near or on the ground. In practice the projectile was usually placed in a leather sling attached to the end of the longer arm. However for simplicity, we shall ignore the sling and compensate for this omission by increasing the assumed length of the beam on the projectile’s side. The counterweight was then allowed to fall so that the longer arm swung upward, the sling following, and the projectile was ultimately thrown from its container at some point near the top of the arc. The far end of the sling was attached to the arm by a rope in such a way that the release occurred at a launching angle near the optimum value ( most likely by repeated trials) for the launch height. The launching position is shown in fig.2 where we have assumed that the projectile is released at the moment the entire beam is vertical. In the figures: (a)=height of the pivot, (b)= length of the short arm, (c)= length of the long arm, while (v) and (V) are the velocities of (m) and (M), respectively, at the moment of launching.
Another piece of weaponry that the U.S had made their own version of was the cannons. The cannon was first used in 1861 at Fort Sumter in the U.S Civil War. These were a major upgrade in weaponry as it could help take out big crowds of men and helped so men wouldn’t have to be on the front lines and risk getting killed. Also battles seemed to get quicker because of its strength, but it had some downsides too. These downsides including very bad injuries to the men, also more men would be killed in battles, and finally a lot of cities were destroyed because of it.
Another type of catapult is the Onager. Onagers were used right up to the middle ages with the Trebuchet, when gunpowder and the Cannon were invented and eventually replaced the catapults.
According to Chevedden et al., (2002) the Latin word for trebuchet was “ingenium” and those who designed, made and used them were called inginators. These early engineers kept modifying the trebuchet to increase the range and impact force. One of the improvements engineers made was varying the length of the sling ropes so the shot left the machine at a ? angle of 45 degrees to the vertical (shown in the figure above), which produces the longest trajectory (Chevedden et al.,
Archimedes Iron Claw was one of Archimedes’ greatest inventions. It was incredible machine, the likes of which had never been seen before and was likely never seen again after the Second Punic War. The claw was employed in the year 213 B.C.E. when Roman warships attacked the coastline of Syracuse. Archimedes employed an ingenious system of long range catapults and ballistae along with the iron claw and other machines for surprising any enemies that got within close range of the wall. Part of the genius of the iron claw is that, by Polybius’s description, it seems to have been operable by only one man while having the power to take out an entire quinquereme weighing roughly 100 metric tons.
...e went into motion. Possible projectiles of the trebuchet were living prisoners, jugs of Greek fire, rocks, and animals. Another large weapon of siege was used primarily in storms, the battering ram. In its early stages, the ram was no more than a hefty beam with a mass of metal attached to the end. Men would hoist the cumbersome boom onto their shoulders and run into a wall or door as many times as needed until the surface under attack gave way. In the Middle Ages, it was developed into more of a machine, for the ram hung from the center of a tent under which the men operating the ram could hide. The ram could be swung like a pendulum much more easily than having to constantly run back and forth. Also, castle guards often poured hot oil or other things onto the ram and its engineers. The tent, which was on wheels, protected the men and the battering ram as well.
The engineering discoveries of ancient Rome have played a key role in the history of architecture and engineering. Many of Rome’s roadways, bridges, and aqueducts have been in use from the first century until the twentieth century. Many American buildings have used the Roman dome. Several major structures from early Rome still stand, including the Collosseum. These remnants of feats of Roman engineering stand as a monument to the ability of ancient Roman builders.
The invention of gunpowder found its way into the artillery cannons in the fourteenth century, but this job was very dangerous because of the unpredictable reaction of the fired explosives. The early production of gunpowder was hampered by the cannon’s slow rate of fire, inability to travel swiftly, lack of aiming capability, and confusion on the mixture. The barrels were one to three inches in diameter and some were even mounted on the bottom of carriages. The development of gunpowder is momentous in history, because it marks the invention of modern warfare.
Hart-Davis, Adam. "BBC - History - Ancient History in Depth: Discovering Roman Technology." BBC - Homepage. 17 Feb. 2011. Web. 17 Apr. 2011. .
“Volley Guns” (Chivers, 2010, p.26) or also known as “Organ Guns” (Ellis, 1975, p.10) were first attempts at increasing firepower by adding several barrels at the firing itself, rather than simply attempting to increase the rate of fire. “Gunsmiths had long ago learned to place barrels side by side on frames to create firearms capable of discharging projectiles in rapid succession. These unwieldy devices, or volley guns, were capable in theory of blasting a hole in a line of advancing soldiers” (Chivers, 2010, p.26). An example of such weapons can be seen on July 28, 1835 when Giuseppe Fieshi unleashed terror on King Louis-Phillipe in Paris, France. He fired his 25 barrel “volley gun”, killing 18 of the king's entourage and grazing the King's skull. The weapon was ineffective however. Four of the barrels failed and another four ruptured. Two other barrels had exploded inside, grievously wounding Giuseppe. (Chivers, 2010, p. 27)
17 Williams, Trevor I. A History of Invention: From Stone Axes to Silicon Chips. pg
Useful for the military, projectile motion can now be used for a number of weapons; which is when an object (like a bullet or cannon) is thrown-projected- and mov...