About secondary rotors (see also Figure 2, page 810):
I just proposed to use it for a flexible kite flying crosswind at low speed, in order to obtain a high rpm of the tip turbines, so more lightness.
About secondary rotors (see also Figure 2, page 810):
I just proposed to use it for a flexible kite flying crosswind at low speed, in order to obtain a high rpm of the tip turbines, so more lightness.