Before revision: In 1997, the Legaignoux brothers developed and sold the breakthrough "Wipika" kite design which had a structure of preformed inflatable tubes and a simple bridle system to the wingtips, both of which greatly assisted water re-launch.
After revision: In 1997, the Legaignoux brothers developed and sold the breakthrough "Wipika" kite design that had a structure of preformed inflatable tubes and a simple bridle system to the wingtips, both of which greatly assisted water re-launch.