Highly Skewed Propellers—Full Scale Vibration Test Results and Economic Considerations

This paper presents full scale test results and discusses the effectiveness of three different highly skewed propeller designs in reducing ship “ibrati on. The test results cover three merchant ship designs, including one OBO vessel and two RO/RO vessels, having installed horsepower rangj.ng from 24,000 to 37,000 SHP. Limited discussion is presented on the relative effectiveness of installing a highly skewed propeller “ersus adding additional structural reinforce– ment on a vessel to reduce excessive “ibration. Some economic factors that should be considered by a ship owner contemplating a highly skewed propel– ler for a new ship design are pre– se”ted.