Trabuco is a form of weapon that was used in the Middle Ages. The purpose of the defense was to crush walls of masonry of their enemies. It would also be used to shoot projectiles over the walls. The origin of the device was China. The Europeans used the machine during the time of the Crusades.

During the time, trabuco weapon was terrifying and very useful. It does not use any complicated mechanism like the catapults. It became popular because it was easy to make and equally easy to use and maintain. It also could launch heavy projectiles at a long distance than any other machine at the time.

The concept of the invention of the Trabuco on comes from the sling. The sling is contained in a small piece of wood so that the weapon is extended to offer a better lever. The Chinese then evolved this to the traction bolt. The bolt used a particular number of people over the strings that have been attached to the short arm of a lever, and a sling was over the long arm. That was the smallest type of Trabuco. According to the extension is smaller, but it is more portable. The time between the launches are also shorter and more facility was used in the transportation.

The smallest kind of traction beam can be operated just by one person. The machine is fed the individual who is pulling the ropes and the weight. However, most of these devices were made in larger sizes. The larger ones would need about 15 to 45 men to handle it. Two men would be required for each rope. Those who mostly operated the Trabuco were local citizens who were assisting in defending their city or in attacks.

The mechanism used in the operation of the Trabuco is the conversion of the potential gravitational force to kinetic energy. Some of the potential energy, however, is lost in the form of sound and heat. The size of the weight is directly proportional to the velocity of the projectile. The calculation of the potential gravity, the potential difference, and also the kinetic energy are linked to how the weapon is operated.

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