Flying Christian Derefat's Vortex UL at the Haarrijnse Plas, Utrecht. Another great open source trickkite design by our belgian friend. Very pitchy and a lot of fun to fly. Thanks to Fred Blok for providing the kite. Enjoy in HD!
Plans are available here: http://users.skynet.be/cerfvolanttrick/prototypes.htm
http://kareloh.com/ickytv_wp/wordpress/ ... vortex-ul/