Hi @gordon_sp,
Your stepped axis with pulleys looks to be a workable solution. The question is balancing between the expected benefit by the orientation of the turbines, and the weight and complexity of the device.
According to the report below, SuperTurbine ™ looks to be efficient (see § 5):
I remake my sketch (see below) because the rope-drive is useless in the SuperTurbine ™ part. The rope-drive connects the lower rotor to the generator at the ground in Kitewinder patent way.
