“That is exactly what you just said. I was agreeing with you.”
Almost. You referenced a “rotor”.
I was clarifying that it doesn’t rotate.
GeCheng Zha, a professor of aerospace engineering and director of the Aerodynamics and Computational Fluid Dynamics Lab at the University of Miami College of Engineering is using an approach that is a variant of the Flettner rotors developed in the 1920s, but with a fundamental twist.So, in the article it was called a variant of a rotor, but I get your point now.