Effect of Counterweight Mass on the Range of a Counterweight Trebuchet

Öztürk, Hidayet Cem (2015) Effect of Counterweight Mass on the Range of a Counterweight Trebuchet. Other thesis, TED Ankara Koleji.

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Although it has none or little use today, trebuchets were essential siege weapons in medieval warfare. Especially the counterweight trebuchet is capable of throwing massive objects at great distances. In this investigation, it was intended to examine a counterweight trebuchet’s performance over increasing quantity of mass that the counterweight part contains. A mini trebuchet is built out of wooden planks, using a simple mechanism to project a small metal ball. After controlling all the other factors the experiment was carried out to observe the ball’s range with different counterweight masses. When the data recorded was plotted on a graph, a linear change was observed with a slope of 3.208 m/kg for a 130.0 g metal spherical ball. According to the hypothesis, a linear change was estimated indeed, only with a slope of 4.630 m/kg. This ratio of error, approximately 30.71%, can be ignored, since estimations on the range were based on a frictionless system, not to mention it’s not possible to construct a 100% efficient system or even close to that in terms of thermodynamics. Correlation coefficient of the experimental results is 0.9964, which shows that the results are consistent within the experiment itself. On the other hand, efficiency of the trebuchet gradually decreased with increasing counterweight mass, indicating that the system has an energy capacity and the range would rise only up to a point if further investigation was done. As a conclusion, this experiment provides a brief understanding of principals of pre-gunpowder siege units in general, as well as scopes the particular mechanisms of counterweight trebuchets and methods to optimize a trebuchet in order to maximize its energy efficiency.

Item Type: Thesis (Other)
Additional Information: Supervisor Name: Mehmet Bozkurt, IB Notu: C
Uncontrolled Keywords: counterweight trebuchet, trebuchet,
Subjects: Q Science > QC Physics
Depositing User: Kamil Çömlekçi
Date Deposited: 25 Aug 2015 08:15
Last Modified: 25 Aug 2015 08:15
URI: http://tedprints.tedankara.k12.tr/id/eprint/640

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