Albion Swords’ diagrams of sword dynamics
http://www.albion-swords.com/articles/images/sword-dynamics.pdf
And here, Peter Johnsson discusses balance points, pivot points and nodes.
http://www.myarmoury.com/talk/viewtopic.php?t=8088
And finally, their sword glossary!
http://www.albion-swords.com/articles/images/sword-terminology.pdf