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The enormous transport Syracusia possibly had the largest ship-mounted catapult of the ancient world, an 18-foot (5.5 m) machine that could fire arrows or stones up to 180 pounds (82 kg). [ 2 ] During the Siege of Syracuse (214–212 BCE) , the Greek defenders used a barrage of machines developed by Archimedes , including powerful stone ...
Clay body being extruded from a de-airing pug. A pugmill, pug mill, or commonly just pug, is a machine in which clay or other materials are extruded in a plastic state or a similar machine for the trituration of ore. [1] Industrial applications are found in pottery, bricks, cement and some parts of the concrete and asphalt mixing processes. A ...
In pottery, a potter's wheel is a machine used in the shaping (known as throwing) of clay into round ceramic ware. The wheel may also be used during the process of trimming excess clay from leather-hard dried ware that is stiff but malleable, and for applying incised decoration or rings of colour.
The Livens Projector was a simple mortar-like weapon that could throw large drums filled with flammable or toxic chemicals. [6]In the First World War, the Livens Projector became the standard means of delivering gas attacks by the British Army and it remained in its arsenal until the early years of the Second World War.
The Siege and Destruction of Jerusalem by the Romans Under the Command of Titus, A.D. 70, by David Roberts (1850), shows the city burning. Early thermal weapons, which used heat or burning action to destroy or damage enemy personnel, fortifications or territories, were employed in warfare during the classical and medieval periods (approximately the 8th century BC until the mid-16th century AD).
Large mounted crossbows known as "bed crossbows" were used as early as the Warring States period. Mozi described them as defensive weapons placed on top the battlements. The Mohist siege crossbow was described as humongous device with frameworks taller than a man and shooting arrows with cords attached so that they could be pulled back.
Vitruvius gives the following formulas for the hole diameter: it is the length of the bolt divided by 9 for the bolt-throwing machines, or : () /, for the stone-throwing machines, where W is the weight of the projectile in Attic minas (1 mina = 436.6 grams (15.40 oz)), and the hole diameter is measured in dactyls (1 dactyl = 19.3 millimetres (0 ...
The onager was a post-classical Roman siege engine, which derived its name from the kicking action of the machine, similar to that of an onager (wild ass). It is a type of catapult that uses torsional pressure, generally from twisted rope, to store energy for the shot.
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