About the sketch with rope-drive system: after a more in-depth analysis, it seems that this is inapplicable, whether for two counter-rotating rotors (the rotation is canceled, unless only one of the two rotors drives one of the pulleys from above, which has the effect of a lock as soon as the rotation speeds of the respective rotors are not matched) or for a single rotor (whose blades could not have the suspension lines that are nevertheless essential).
About the sketch with generators and their respective wheels, a variant is proposed below, including a ballute with cross ropes at the base of the parasail, and suspension lines for the blades. There is little chance that this could be effective: at least we can save the mass of the gearboxes thanks to the high rpm by direct drive, using standard generators.
