Plymouth A-A-2004

Built specifically for Zaparka in 1930 by three anonymous American inventors, this aircraft showcased the innovative use of the Magnus effect in aviation, leading to successful flights over Long Island Sound.

[1][2][3] The Plymouth A-A-2004 rotor aircraft employs a distinct design, using rotating cylinders in place of traditional wings to produce lift.

The design drew inspiration from the Flettner rotor and was reported to have achieved successful flight missions over Long Island Sound.

[1] The Magnus effect describes the phenomenon wherein a spinning object moving through a fluid (e.g., air or water) creates a difference in pressure on its sides, resulting in a force perpendicular to its motion.

As the drum's rotation slows down, the Magnus effect's lift generation would diminish, compromising the aircraft's ability to maintain altitude and potentially leading to a rapid descent.