Day 1 of Trebuchet project

Its the first of my project of learning about trebuchets. This was one middle ages weapon that work real good to crusaders to break and destroy castle wall and to kill arrow shooters and others protecting the castle or what has been fired at. Trebuchets are mostly use in Western Europe, and the stablility of this machine is base on manpower and weight, its also came by with what we know as pulleys. A trebuchet has enough power so it can launch up two 300 lb stones to a max of  300 yards. There are three different types of trebuchet:
 1) Traction 

 

2)Hand 

3)Counterweight