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EcosNavis Solutions has developed a new wind-assisted propulsion system aimed at improving the efficiency of Flettner rotor sails for use in deep-sea shipping. The company presents the „Eco Rotor Sail,“ a stern appendage designed to increase thrust and reduce power requirements. Additionally, the system is intended to expand the wind angles.
According to the company, Flettner rotors, which were first used in the 1920s, are gaining increasing importance as ship operators seek ways to reduce fuel consumption and emissions. However, a central issue with the broader application of this technology is the reliability of performance in changing wind directions. The original concept by Anton Flettner has changed only minimally over the years.
EcosNavis’s design aims to expand the effective „wind window“ of the rotor. By reshaping the airflow in the wake of the rotor, higher thrust is to be achieved with lower torque. Initial simulations conducted by the Glasgow-based company reportedly show promising results: an increase in thrust of up to ten percent and a reduction in torque of five percent.
