As a Flettner rotor can have a high spin ratio thanks to the spin motor, it could be extended by blades forming a horizontal VAWT then again by a Flettner rotor and so on, the TSR of the VAWT (3-4) matching the spin ratio of the Flettner rotor which should be constantly adjusted according to the wind speed, using an rpm-check. Rope drive transmission as previously.
According to P. Sharp, a Sharp rotor could also be used, consuming slightly more energy than a Flettner rotor.
But as a Sharp rotor without a motor has a higher lift coefficient (Cl = 2.5-3) than a Flettner rotor (Cl = approximately 2 at spin ratio of 1) at its natural spin ratio of approximately 1, we can deduce that with a motor and at higher spin ratios, its lift would also be higher, but all that remains to be seen.
According to a simplified variant, the spin motor could be removed, the VAWT providing both lift of the Flettner or Sharp balloon, and power generation.
