Ship owners can reduce fuel consumption by up to 9% and shave thousands off their fuel bills simply by installing Waertsilae's Energopac, an easy-to-install rudder/propeller combination that uses a rudder bulb behind the propeller hub mounted on a custom-designed full spade flap rudder. Finnlines, the Helsinki-based shipping company, has ordered Energopac to be fitted on six sister vessels currently being built for delivery in 2009.
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