Norsepower Rotor Sail™ is a radically modernized version of the Flettner rotor. The product utilizes the Magnus effect to create thrust.

Norsepower Rotor Sail™

Norsepower Rotor Sail™ uses a minimal amount of the ship’s electric power to rotate cylindrical sails on the ship’s deck. The rotating cylinders use wind to create powerful thrust. This allows the main engine to be throttled back, saving fuel and reducing emissions. The Norsepower Rotor Sail™ is around ten times more efficient than a conventional sail. Due to its simplicity, it requires no reefing or other old-fashioned crew attention when in operation. 

It is a push-button wind propulsion solution. 

Magnus effect

Norsepower Rotor Sails™ are radically modernized versions of Flettner rotors. 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 same principle applies to all rotating spheres and cylinders. This can also be observed for example in golf, tennis, or football, where spinning balls curve in flight.

Norsepower is the leading company in the rotor sail business – with several patents granted

The optimal number and size of Norsepower Rotor Sails™ on a vessel depends on the size, speed, and operating profile of the vessel. Norsepower Rotor Sails™ are available in five different models: 18m x 4m, 24m x 4m, 28m x 4m, 30m x 5m and 35m x 5m. 

Norsepower works together with the customer to optimize the solution for each project. This can include simulations, feasibility studies and support with the classification.

Product elements are:  

  1. Norsepower Rotor Sails™, which deliver the forward thrust.
  2. Foundation (with tilting option if needed) that is installed on the deck.
  3. Norsepower Control™ panel and automation system, which gives the captain full control of the operation and performance of the product and optimises the forward thrust and saving.
  4. Measurement devices for ambient conditions.
  5. Norsepower Remote Service Support Agreement can be purchased for around the clock technical support and maintenance.

Rotor sails, how do they work?