Updated preprint:
Trosposkein or round shaped VAWT
These are known forms of VAWT. They can gain another advantage from the use of lightweight inflatable materials through the use of centrifugal force [22] which tends to stiffen the shape as long as the angular speed is sufficient.
Experiments seem to have shown that a Sharp rotor (and probably also a Flettner rotor) inside a VAWT [23 and 24] does not produce significant lift and slows down the VAWT. This is why the central inflatable beam should be narrow, or replaced by a carbon or fiberglass rod. So Sharp or Flettner or Savonius rotors are settled on the sides, and can be inflatable, possibly with a gas lighter than air, just like the blades, or foam (under the crosswind or static kite).
WILLIAM GENE ROESELER is the inventor of the rotor shaped by centrifugal force: