This is one of the first dioramas I made back in 2013. Fully functional trebuchet made of wood, metal, pins and strings among other materials.
These siege machines were dated in 12th-16th century. They usually needed specialised servers and workforce consisted in 60 to over a hundred men for all tasks. However, they had a quite low firing rate, 1 to 2 loads/hr, and they were able to launch up to 125kg stones balls to 220m distance.