Glass & Geometry This is not really a kite but much more a sail, used for propulsion. I developed a line of these traction devices based on the work and with Wolf Behringe of Germany, who supplied adventurers like Reinhold Messner with ParaWings to cross the Antarctic. Here a friend is experiencing the lifting power of a 120 sqft ParaWing in Peterborough, NH (C) 2022 Hans Schepker