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Oldendorff Carriers to outfit three Norsepower Rotor Sails to a post-Panamax bulk carrier

Oldendorff and Norsepower announced an agreement to use Norsepower Rotor Sails to reduce CO2 emissions on a modern bulk carrier. The vessel Dietrich Oldendorff (IMO 9860350) is to be outfitted with three 24m x 4m Norsepower Rotor Sails by mid-2024. It is contracted to be employed on a North Pacific trade route to Asia.


The Norsepower Rotor Sail is a radically modernized, digital-era version of the Flettner rotor. (Earlier post.) The rotor sail utilizes the Magnus effect to create thrust and propel the ship forward.

When wind meets the surface of the visible, spinning rotor part of the sail, the air flow accelerates on one side and decelerates on the opposite side of the rotor sail. The change in the speed of air flow results in a pressure difference. This creates a force that is perpendicular to the wind flow direction.


The rotor sail uses a minimal amount of the ship’s electric power actively to rotate the cylinder-shaped rotors on the ship’s deck. (A variable speed drive (VSD) electrical motor is powered by the ship’s low voltage network to spin the cylindrical rotor.)

Rotation, together with wind, packs the air behind the sail and creates thrust, thereby saving fuel and reducing emissions. The huge, spinning rotors are partly manufactured from approximately 342,000 plastic bottles.

The product has already been used by customers for about 10 years and has 310,000+ operating hours on ships operated by some of the world’s best-known shipping companies and charterers, delivering 21,000+ tons of CO2 emissions reduction so far. The installation on the Dietrich Oldendorff will take place in Q2/2024.


Tim Duncan

These things look tiny, therefore insignificant therefore just for virtue signaling crap!

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