Links
Société de l'Oriflamme. Non-Gunpowder Artillery. July 1998. Revised May 28, 2004.
<"http://www.xenophongroup.com/montjoie/ngp_arty.htm">
This source was really useful to us as it explained in detail, the different types of siege weaponry and the process of constructing one.
Tunis, Edwin. "Catapult." Encyclopedia Americana. 2008. Grolier Online. 31 Oct. 2008
<"http://ea.grolier.com/cgi-bin/article?assetid=0081250-00">
This source was really helpful, as it gave a bit of history on how catapults were effectively used in ancient wars.
Cuomo, Serafina. The Sinews of War: Ancient Catapults. 2004.
<"http://search.ebscohost.com/login.aspx?direct=true&db=ulh&AN=12306151&site=src-live">
This source gave a scientific explination of how the catapult fired, how it was made, and how it was deployed in war situations.
Henderson, Tom. Elastic Potential Energy. 1996-2007.
<"http://www.glenbrook.k12.il.us/gbssci/phys/Class/energy/u5l1b.html">
This source detailed the scientific reaction in springs, and gave us the formulas for the spring constant.
Image One
This is a 3D render of what our catapult was designed to look like. It came out very close.
Image Two
This is another image of our catapult as we were still making it.
Image Three
This is an image of the final build of the catapult