Trabuco is an ancient weapon used during a siege to propel stones weighing up to a tonne to demolish walls and firing projectiles over the walls into the enemy territory. Trabuco is quite similar to the catapult although its inventors, the Chinese got the idea from the sling. They reasoned that a bigger version of a sling operated by a group of men would cause more damage to their rivals thus its inception.
The Trabuco was an efficient and terrifying weapon in the middle ages, it was simple to maintain and easy to manufacture, but the carnage it caused was massive. During the crusades, the Europeans saw the devastation that it could cause and they liked it and when they went back to Europe, they introduced the Trabuco into their warfare. Although it was used for warfare, prisoners would be punished by being flung across the air with the Trabuco landing to their death. Generals would also order their soldiers to fling the heads of their enemies who were captured and killed back to their base as a sign of psychological torture.
Trabuco did not use a complicated mechanism, and it was easy, depending on the size of men who load the stone and use their strength to pull strings and release, that was all. Its ability to launch heavier stones than regular arms was a major selling point as well. Trabuco mechanism consisted of transforming gravitational energy into kinetic energy as it glided through the air to its target making it a very efficient weapon. An army that had it in their arsenal had the upper hand in the fight. The only problem with using the Trabuco was hitting its target since it did not have a guiding principle, it would miss on more than one occasion.
During the 4th, 5th, and 6th centuries, the Trabuco was a must have weapon for an army that sought to conquer a new town or penetrate a fortress. The invention of the gunpowder, however, put an end to its use as using gunpowder in a canon was more accurate in hitting its target and did not require a lot of manpower. Learn more:http://pt.wowhead.com/item=65997/trabuco-do-tributo