The key idea of Kitenergy is to harvest high-altitude wind energy with the minimal effort in terms of generator structure, costs and land occupation. In actual wind towers, the outermost 30% of the blade surface contributes to about 80% of the total generated power. We therefore decided to remove all the heavy and static structure of a wind tower, keeping only the outer part of the blades. This gave us a much lighter wing, able to fly extremely fast in crosswind conditions, connected to the ground and capable of generating energy in a significantly more efficient and effective way.