Independent tests on a Viking Line-owned and operated cruise ferry have showed that Norsepower Oy's Rotor Sail technology has the potential to deliver LNG fuel savings of around 300 tonnes per year. Analysis companies NAPA and ABB reviewed the data and were able to isolate an evident change in the propulsion power breakdown of Viking Grace, caused by the Rotor Sail. The same conclusion was confirmed with a strain gauge analysis, where forward thrust of the Rotor Sail was measured and converted into propulsion power.
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