Roman Artillery Quinquereme, Celtic Onager (Ship)

Description

The 'five', called a quinquereme in Latin and a penteres in Greek, was a ship first used by the Syracusans against the Carthaginians sometime around 398BC. Like other polyremes, a term meaning many-oared, the chances were that it did not have five banks of oars but that the word 'oar' was used to mean 'rower'. In such a case, the arrangement of rowers would be two-two-one going up from the waterline. It makes sense to keep as much weight as possible low in the vessel to help its stability; a high centre of gravity makes any ship liable to capsize if struck from the side. The quinquereme, then, would be a formidable vessel both in terms of appearance and combat value. With a large fighting contingent aboard and plenty of deck space, this heavy vessel could cope with most enemies and threats.

One of the simplest forms of one-armed catapult, the onager relied on twisted skeins of animal sinew which provided the power to hurl either rocks or shot. Inaccurate but powerful, it was an effective siege engine against buildings and fortifications, but was of far less use on the battlefield unless firing into massed infantry ranks. First mentioned by Philon of Byzantium in his treatise ‘Mechanics’, the onager had a sling-like cradle attached to a firing arm. This arm was inserted and twisted to propel its shot through torsion. As the firing arm was released, the sling-like cradle would unhook, firing the projectile. A padded beam was incorporated into the housing frame to restrain the arm. Larger machines could require as many as eight or ten crewmen, and the incredible recoil meant that they could not be easily or safely mounted on walls or towers. Quickly constructed wherever wood was readily available, onagers soon became a staple of ancient siege warfare.