The mangonel is the most common association to a catapult. This machine is equipped with an arm with a basket attached. Using tension, the arm of the catapult was pulled back, and then released to throw objects. (PRO) The mangonel was great for low trajectory targets like walls. (CON) However, the mangonel is energy inefficient as most potential energy is used to rotate the arm at a high velocity instead of directly to the objects instead the arm basket.
The ballista is similar to a large crossbow and was a torsion powered catapult. Torsion was means of power in catapults by twisting a rope to create force. As the rope would become tighter and then released, if would project the object towards to target. It was propelled by such force that it could do much damage to soldiers or the walls of the castle (PRO). However, it was very bulky and difficult to transport (CON).
The mangonel would be the best type of catapult to build because it is best for low angled targets, which fits best with the project situation that will test our catapults. The mangonel will give the right amount of power without overdoing it's range to hit the target and work properly.
TYPES OF CATAPULTS
Mazmu Islam & Akansha Rao 1A
HISTORY OF CATAPULTS
Catapults began use since the medieval times as a means of expanding the ranges of fire arms as well as demolishing the walls of castles and villages during battle. The first catapult, however, was called the Gastraphetes and was created in 400 BC in Greek town Syracus. The machine took great effort unload and reload, so the catapult was improved by the Greeks by inventing the ballista, which operated with a crank. The trebuchet as well as the mangonel were more forms of the catapult used. Catapults during the Middle Ages depended highly on tension, torsion. traction and gravity.
This machine was used for maximum force. A sling at the end of the arm was filled with projectiles with a counterweight at the other end. This potential energy is then concerted to kinetic energy as the counterweight was released. (PRO) It is very accurate, could do considerable damage, efficient in converting all energy to the projectiles. (CON) However, it was considerably large and would have been a target of demolish by the often team in battle.
"Catapult History and Modern Day Construction." Catapult History and Modern Day Construction. Web. 16 May
"Catapult Physics." Real World Physics Problems. Web. 16 May 2016. "History of Catapults - Physics of Catapults."
"History of Catapults - Physics of Catapults." Web. 16 May 2016.