Trebuchet and Romans

[Robert]

Looking at the mechanics of both the onager and the trebuchet, the later is far more fitting to lob large stones then the former. The trebuchet's immense power is based on two principles, one being the use of gravity to propel the heavy counterweight, the other the long arm and sling, providing a very effective lever mechanism, which generates far greater power then a torsion wound siege engine ever can. It is plain, simple physics.