For launching rocks and fireballs to defend a city or fortress.
Mechanics: hand crank; worm and worm gear; spur gear and recessed face gear; projectile throwing engine.
         
        
      
         Ramelli, Agostino. “Plate 191: Moveable Counterweight Trebuchet.” In Le Diverse Et Artificiose Machine Del Capitano Agostino Ramelli. Paris, France, 1588. https://digital.sciencehistory.org/works/h702q667h.
      
      
        
            Export citation (RIS)
        ?
      
      This citation is automatically generated and may contain errors.