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Working model after Taccola, Cod. Lat. Monacensis 197 II (BSBM), fol. 95r
The operating principle of this trebuchet differs from the preceding type. The beam is powered by the stone-filled counterweight crate, but its travel is stopped short by a cross-beam, causing the release of the projectile.
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Mariano di Iacopo, called Taccola
Trebuchet
Stop-motion trebuchet