Trabuco is a sort of siege weapon, which dates from the Medieval Period. It was used in smashing the enemies’ masonry walls or shooting projectiles over them. It had its origin in East Asia, China.
During the Crusades, Europeans used the Trabuco, that time it was a terrifying, efficient weapon. In contrast to the catapults, mangonels, and ballistae, the Trabuco doesn’t use any complex mechanism. It became popular because of its simple design, maintenance, and it could launch projectiles that were heavier and at a greater range than most of the similar firearm that existed at that time.
The mechanism of Trabuco is made up of converting the gravitational potential energy (PE) into kinetic energy (KE). Not all the PE is converted into KE; one part vanishes in the form of sound and heat. The counterweight size is ∝ (directly proportional) to v (velocity) of the projectile; the greater the counterweight is, the more powerful projectile is going to be launched. The physical calculations of potential gravitational, kinetic energy and potential difference are linked directly to the operation of Trabuco on dicionarioinformal.com.br.
Humans operated the first traction Trabucos. Wu Jing Yao Zong described the biggest documented Trabuco sample in his military monograph as being supplied by 250 people plus casting a stone weighing 140 pounds at 80 meters. That kind of huge machine was rare because of the complex logistics of managing the large operational teams.
The Arab merchants introduced the traction Trabuco firearm to the area of the Middle East. They improved the design, adding more weight to the arm, specifically at the short end; this gave an additional reach to the Trabuco. Records of the hybrid Trabuco that existed during the early thirteenth century are available. The hybrid Trabuco was capable of casting stones weighing 400 pounds at walls of the famous Egyptian city of Damietta.
According to youtube, the Europeans saw the initial hybrid Trabuco at the time of Crusades. They realized it could carry a greater weight and in a short period, by using human strength plus constant weight; this also improved the scale accuracy. The changes gave birth to the firearm called counterweight blunderbuss.
Find more about Trabuco: https://www.merriam-webster.com/dictionary/trabuco