“When we consider wind power, the aim is to catch as much wind as possible, and bigger sails catch more wind. The first Rotor Sails we looked at from Norsepower where much smaller, similar to previous installations on other vessels. After analysis, we asked Norsepower how big they could make their sails.
Due to transportation from the factory to the shipyard, the largest sail they can produce is 35 metres long and 5 metres wide. The two Rotor Sails for SC Connector will be the largest Norsepower has delivered to date,” Hvide continues.
Sailing service speed
In transit, the main combustion engine onboard SC Connector delivers all the power required for the propeller and ship systems. From calculations, we know that SC Connector’s propeller produces approximately 367 kN of thrust at 13.7 knots. As the wind speed increases, more thrust is generated by the rotor sail, relieving the main engine.
However, you cannot count on perfect wind conditions every time you cross the sea. SC Connector operates in the North Sea, which has some of the most favourable wind conditions in the world. With no wind, there will be no contribution from the sails. In stormy conditions, however, the vessel will need no other propulsion power. Similarly, with head winds there will be no contribution from the sails, while side winds will give maximum utilisation. With gale-force winds and a favourable heading, the vessel will maintain service speed on sails alone.
Combined with a battery pack from Norwegian Electric Systems, SC Connector can avoid the use of auxiliary engines, which means that she can be 100 percent emissions free during sailings and at quay