A Trabuco is classified as a siege weapon like a catapult. This weapon was used to smash masonry walls and fire projectiles over these walls. The weapon is also called a balancing Trabuco as a distinction from other weapons. The term in Brazil refers to shotguns and revolvers of old manufacturers and large calibers.
Trabuco weapon appeared in the Muslim and Christian countries around the Mediterranean and was fairly accurate. High speed projectiles of 140 kilos could be sent to enemy fortifications from as far as 800 meters. Some reports show bodies laced with disease were launched to infect the people being attacked. This is referred to as the middle ages biological warfare on help.madmoo.com. China invented the Trabuco in approximately 400 BC and in 600 AD Trabuco’s made an appearance in Europe. Trabuco’s continued to be used until gunpowder was discovered.
The design of the Trabuco on pt.wikipedia.org transforms potential gravitational energy into kinetic energy with the mechanism being derived from the sling. All the potential energy does not become kinetic energy because part of the energy dissipates due to friction. The counterweight’s size must be in proportion to the projectiles velocity. A larger counterweight adds strength to the launching of the projectile. According to dicionarioinformal.com.br the physical calculations regarding the kinetic and potential gravitational energies are linked to the weapon’s operation. This is the reason teacher’s often use the Trabuco to explain physical principles.
The Trabuco was derived from the sling with the weapon being extended by a little piece of wood. This gave the weapon an improved lever. The Chinese were responsible for the traction bolt so more than one individual could pull the strings. The strings were connected to a short arm of the lever with a sling draping over the long arm. This type of Trabuco is smaller, more portable, and able to launch more projectiles in less time. Most Trabuco’s were much larger in size and 15 to 45 men were required to handle them and each rope needed two men. The men in charge of operating the Trabuco were local citizens and defended their cities by participating in the attacks.
Learn more about Trabuco: https://www.merriam-webster.com/dictionary/trabuco