Flat or Bowed Kites. A great piece of flying art here. The curved leading edges would have required some skill in fitting the sails. Quite a complex kite with 3 sets of double-keels. Unique design from an aerodynamic point of view! T.P. (my-best-kite.com) "vlieger" Photo by Gerard Stolk (vers le Chandeleur) on Flickr (cc).