Equipment  - Airfoil and Wing

  Wings and Aerodynamics

http://wright.grc.nasa.gov/WWW/K-12/airplane/geom.html

Have a look at FoilSim  from   http://www.grc.nasa.gov/WWW/K-12/aerosim/

How to design a Paraglider, Tips in German

http://www.gleitschirm-magazin.com/pdf/konzeption1.pdf

http://www.gleitschirm-magazin.com/pdf/konzeption2.pdf

Carabiners can break

http://www.gleitschirm-magazin.com/pdf/karabinerkaputt.pdf
 

And some more info on the history of flying in general

http://ocw.mit.edu/OcwWeb/Aeronautics-and-Astronautics/16-00Introduction-to-Aerospace-Engineering-and-DesignSpring2003/RelatedResources/index.htm