Regarding the cost of re-launching, that is one of the things they carefully model in software. For brief pauses in the wind it's cheaper to just stay aloft und

Regarding the cost of re-launching, that is one of the things they carefully model in software. For brief pauses in the wind it's cheaper to just stay aloft under grid power. These wings are more like a sailplane than a jumbo jet; keeping them in the air probably takes less power than you would think.