Flettner rotor

This force on a rotating cylinder is known as Kutta–Joukowski lift, after Martin Kutta and Nikolai Zhukovsky (or Joukowski), who first analyzed the effect.

[citation needed] Some flying machines have been built which use the Magnus effect to create lift with a rotating cylinder at the front of a wing, allowing flight at lower horizontal speeds.

[3] An early attempt to use the Magnus effect for a heavier-than-air aircraft was made in 1908 by a US member of Congress, Butler Ames of Massachusetts.

[8] The Flettner rotor inspired Sigurd Johannes Savonius to invent[9] a spinning ventilation device after a collaboration between the two inventors.

[10] The devices are often referred to as "Flettner ventilators" even though the mechanism more closely resembles a Savonius wind turbine, which was a 1924 invention that resulted from the same collaboration.