Sword STEM is a project by Sean Franklin that studies the science behind swords, and sword work. Many excellent articles from bio mechanics, to metallurgy. Highly recommended!
Because once again Sean has put forth a great article. If you have not checked SwordSTEM out yet DO. IT! There are things in this article that might sound vaguely familiar. ;) :) Vector Transformations and the "Wedge"
Sean's work deserves to be seen. :)