vertical axis wind turbine an amazing "smart" technology
Augment the wind capturing sweptarea !! Not the rotor!!
apply Venturi effect & Bernoulli's law complemented by a super hybrid drag lift rotor (superbooster) and you have a wonderfull engine suitable for even the lowest average windspeeds
It's much cheaper than making giganticand expencive wind turbines rotors.
result: much beter ecological footprint.
Breaking Betz law is a only a "wet dream" and is still "undone"