Technology guidelines for efficient design and …

IntroductionThe number of vessels equipped with controllable pitch propellers (CPP)has steadily grown in recent decades. Today fixed pitch propellers (FPP) areused for vessels where simplicity and operation at sea are dominant. Thisincludes tankers, bulk carriers and vessels are normally equipped with 2-stroke diesel are also a number of vessels where the application of fixed pitchpropellers in combination with a 4-stroke engine and a gearbox hasbecome the standard. Examples of such vessels are container feeders,offshore vessels, dredgers and requirements include the need to use maximum engine power inall operating conditions, along with good manoeuvring capability and fullyautomatic control systems. There is also a continuing demand for increasedpower and ship reliable and efficient machinery, including fixed and controllablepitch propellers, has always been the prime target for W rtsil which haslong recognized these trends and we are continuously updating ourpropulsion systems to meet these in our product line include:nThe most powerful CPP in the worldnThe heaviest FPP in the worldnAdvanced hydrodynamic designsnCompact hub designsnIntegrated control systems with field bus technologynHigh-efficiency article reviews the main desig

To reduce the boundary limitations as much as possible Wärtsilä has developed blade sections that combine large cavitation-free operation with

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