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Giant Crossbow
Sketch of a Colossal Siege Crossbow
by Leonardo da Vinci

da Vinci's giant crossbow as sketched in his notebook

Leonardo da Vinci demonstrates his propensity for the colossus in his famous sketch of a giant  crossbow.  This scan of da Vinci 's notebook details the laminated bow, winding mechanism and trigger of the crossbow.  Scholars doubt anyone every built this crossbow, but large bow like siege engines were part of Greek and Roman artillery long before da Vinci's birth.

Leonardo's notebook also contained studies of a large trebuchet used for defending a fortification and trebuchet and catapult sling release.

da Vinci's crossbow is also featured in the 1903 Ralph Payne-Gallwey book:
eBook - The Crossbow by Sir Ralph Payne-Gallwey
Free
eBook
The Crossbow , Mediaeval and Modern, Military and Sporting; its Construction, History, and Management. With a Treatise on the Balista and Catapult of the Ancients.


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