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Notes about trebuchet
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The engineering of a trebuchet was vastly improved over time, but was only due to our past ancestors wanting to use a trebuchet over a catapult because it is able to launch over longer distances and be more accurate. Many changes have been made to the trebuchet since the 12th century when it was first introduced by Christian’s and Muslim’s. They both used this to throw objects up to 90 kg for about 300 meters. They would use these weapons to throw heavy objects into forts and bunkers. Many armies still used these up through the 15th century, the ironic part about this is that gun powder was made and used at the beginning of the 15th century. The First trebuchet was referred to the “Traction Trebuchet”. This type of trebuchet was based around man’s strength; it would have …show more content…
a man pull down on the arm of the weapon to arm it. These types of trebuchets would cause at least 15 men to pull on a rope to lower an arm down. This method would force ancient engineers to come up with a new plan of approach. The engineers came up with the idea of introducing gravity to the arm of the trebuchet. This would make it easier and more efficient during war to shoot at the enemy. The number of men on each trebuchet would be less than the first trebuchet and could be fired repeatability without wearing out. Even though the design with a counter weight was very effective, it would lead to fatigue. The engineers would then come up with the idea of having a hinge attached to the end of the arm and the counter weight. This hinge would cause less stress on the trebuchet due to the arm swinging loose at the bottom of the swing rotation. This design didn’t only help with the life of the machine, but it also helped with increasing the distance the counter weight fell. Engineers found that making the counter weight fall further; it would lead to increased rotational speed of the arm. This made in increased launch speed and impact of the object. Even though the engineers of this time kept re-vamping there original designs, they still needed supplies to fire at the enemy. These armies would use stones and would be able to throw 2,000 stones a day. Once they ran out of stones, they would start throwing sharp wooden poles, fire, dung and diseased body parts/bodies. The men that worked these machines where called gynours. They would have to build these huge machines where the spot of the battle is and sometimes needed to build them while under fire of enemy arrows and trebuchet missiles.
Even though all trebuchets were similar in design, they were all made up of different materials. Heavy lead weights or a pivoting ballast box were the counter weights on many of the medieval trebuchets. They would also use leather pouches as the sack and then build the frame and arm out of wood/trees. During the medieval times, countries new that building walls would slow down enemy troops. The only issues with this are that they would not be able to defend against the trebuchets that are throwing one ton stones. The trebuchets were able to lock in on accuracy by judging how far their max throw is and would then move it depending on need for more or less distance. The way the modern trebuchet is being used today is mostly for teaching purposes. Colleges have been using this to help students think outside the box and create new trebuchets that can throw huge missiles like a car. We have seen many new ideas and ways to make a modern trebuchet, but all of these trebuchets are based on a single blueprint that was made over 900 years ago. In conclusion, trebuchets can be dated back to the 12th century where they were used for military strategies to throw heavy
stones into kingdoms guarded by walls. They came up with new ways to make the machine last longer weather that is just making the arm stronger or adding a hinge to the counter weight. These easy little improvements made a lot of changes over time, mainly on the life time of a machine because it cut down on the stress of the machine and increases lifetime by making it able to throw nonstop for 2,000 stones. Trebuchets are an old, but very important machine to our science and math courses.
Question 5: “Texts construct characters who represent the best qualities in human nature, as well as those who represent the worst.” Discuss how at least ONE character is constructed in a text you have read or viewed. (Sem 2, 2016)
This is a brief paragraph or two on each of the major siege weapons. For the not just the besiegers but also the defenders. Please note most of these weapons were not used alone and often had many different versions of the same weapon.
During the Revolutionary War, the Artillery assets that were available were a combination of cannons, mortars and howitzers. There were two types of cannons used at this time. The Field Guns, which were lightweight and easier to move, and the Siege Guns, which were much heavier and less mobile. The cannons utilized three different types of rounds. The rounds were solid shot, grapeshot, and canister. The solid shot rounds were used for structures, buildings, and ships. The grapeshot, which was a canvas bag of lead or iron balls, was ideal for long range personnel. The canister shot was a wooden cartridge carrying iron balls and when fired would explode like a shotgun for shorter range personnel. The cannons were mostly low trajectory as opposed the mortars which were high trajectory and fire bomb shells. The mortar was based on a wooden platform and a wedge of wood was used to incline the front of the barrel. There were land service mortars and sea service mortars. The land service being more mobile and the sea service much heavier and were permanently positioned on ships. By the time of the Revolutionary War there were nine types of land service mortar and four types of sea service mortar. They ranged from 4.4 to 13 inches. The rounds fired out of mortars were designed to fire at a high trajecto...
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.
The earliest model was the trebuchet. It started by using a large weight on one end of a pivoting arm. The arm was pulled back the missile was placed and then let go. The weight went down, the arm went, and the missile launched. The later model gained its power from a tightly wound skein of rope, hair, and skin. the skeins were twisted incredibly tight and then had a wooden arm up to sixty feet long placed in between them. The arm was pulled back using pulleys and rope, the missile was placed in the wood cup and then the arm was released. The arm sprang to a 90 degree angle where it was stopped by a large padded piece of wood. The arm was then brought back down and fired again.
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.,
Trebuchets earned a reputation for being much more accurate and precise than their onager and catapult counterparts. Not only was this accuracy a benefit, but being based on rotational motion and leverage rather than torsion (spring power) and lacking in a throwing arm stop, the trebuchet proved a much safer alternative for the personnel operating it. Onagers and Mangonels would literally explode on occasion when the torsion proved too great or a crack developed in the throwing arm due to the rapid stops it experienced.
Though little remains of the tillers or prods of these early Roman crossbows, at least one nut has been found intact. This nut is cylindrical, with fingers cut into the top to hold a string, and a seer notch cut into the underside. It is center-bored for an axle. The cuts are more severe than on later examples, thus making the nut flatter than those found on more modern pieces. This artifact, with its easily recognizable geometry, proves the technical similarities between these and much later crossbows. One other artifact is a turned knob that is thought to be the handle end of the tiller. Depictions in column carvings and stone reliefs at Solignac France help confirm this speculation. These images show short, carbine-type tillers with lathe turned handles fitted with massive prods, often stylized in keeping with artistic representation of the period. These prods were not likely to be the severe recurves shown in these depictions. They were more probably simple wooden straight bows. It is likely that at least some of these were of simple composite construction, as the horn or horn and wood composite technology was kn...
Crossbows can vary a lot in design and construction. They range from 50 to 400 lbs. in draw weight. They can be very small hand held pistols or rifles, which can fire rapidly and accurately with pinpoint accuracy up to 60 yards and kill ranges up to 100 yards. The larger bows with 400lb. draw weights could have ranges of over 400 yards they could fire large arrows, rocks and other types of projectiles accurately while staying well out of range of most enemy fire. These bows were built of large beams and sat on wheels so that 2 men could change the position of the bow easily. These bows were very powerful but were also very slow in loading and firing. They had mechanical winches, which were hand cranked to draw the bowstring back. It took two men to run these bows called siege machines.
...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 trebuchet is used with a long wooden arm refreshed on a hinge point, which acted as a big level. A bullet was placed on one end and soldiers in this earlier form of the trebuchet pushed on slings devoted to the other end to fundamentals swing the arm around and throw the
The crossbow was invented in Ancient China during the Zhou dynasty, around the year 700 BC. A Chinese text, from about 200 BC, gives credit to a Mr. Ch'in of Ch'u for inventing the crossbow. It consisted of a horizontally mounted bow, with a stock and trigger mechanism added. The crossbow is derived from the horizontally mounted bow-trap used by other civilizations around the same time. They had a range of up to 650 feet. The crossbow had a firing mechanism, which was so complicated that it would have been nearly impossible for an enemy to understand how it worked, thus reducing the chance that the crossbow could be copied by hostile civilizations.
“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)
A weapon, according to the Oxford Dictionary, is defined as “a thing designed or used to inflict bodily harm or physical damage”. Due to the fact that humans have always fought and killed each other, it is hard to determine an exact time in which weapons were first used, but according to ancient cave paintings dating back from 10,000 to 5,000 BC weapons such as bows were used. Over centuries weapons steadily advanced until the 16th century when guns were invented. In the beginning of the 19th century, a man by the name of Sir William Congreve engineered the first rocket used in warfare. The rocket was not a very good one, it lacked accuracy, but because of a need to have the best and most powerful weapon, improvements and other designs were created which lead to the first super weapons being built.