Flettner rotors are not a good choice. 4 automatic airfoils that naturally adjust to power, no power and reverse even just by controlling a trim tab. As they make 4x the power of a Flettner, only ...

The rotors themselves are partly made from plastic bottles (more than 340,000 bottles, according to the manufacturer). The Oldendorff vessel will be fitted with three 24 x 4 meters (78.7 x 13 feet ...

The Flettner Rotors generate lift from the wind, which is translated into additional thrust, reducing fuel consumption on voyages. Copper $ 4.8645 / lb 0.54% Brent Crude Oil $ 66.35 / bbl -0.38% ...