da Vinci Style Catapult

thingiverse

A da Vinci Style Catapult reproduced by 3D printing technology. Every parts can be printed without support. Refer to Leonardo's Machines: Secrets & Inventions in the Da Vinci Codices by Mario Taddei, Domenico Laurenza), Edoardo Zanon My blog: http://wakalics.blogspot.kr/ Youtube Link: http://www.youtube.com/watch?v=Gj7cbOEd24M&list=UUO-bsUJqu_i_O71Kg39OlBg Instructions Parts to print: x1 Base.stl x1 Spring.stl x1 Drum.stl x1 Spoon.stl x1 Spacer.stl Vitamin: A rod of diameter 2.5mm(0.1 inch) String Step by step guide: Bond the base and Spring. The holes must concentered. Refer 3rd photo. Put the end of the spoon into the square hole of drum. The open face of spoon must be perpendicular to the circular hole of the drum. Penetrate the base, drum and spacer by rod. Cut the rod into appropriate length Pass through the string into the hole at the middle of the drum. Wind the string to the drum and tie each end to the spring. Enjoy throwing things!