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MEO Class II – NAVAL : 2014/SEP/09 – 2014/OCT/09 – 2015/JAN/09 – 2015/MAR/09 – 2016/OCT/09 – 2017/SEP/09 – 2020/NOV/10
Question
Q10. A. Explain what is meant by singing of propeller.
B. A propeller 6m diameter has a pitch ratio of 0.9, BAR 0.48 and, when turning at 110 rev/min, has a real slip of 25% and wake faction 10.30. If the propeller delivers a thrust of 300 KN and the propeller efficiency is 0.65 calculate - i Blade area; ii Ship speed; iii. Thrust power; iv Shaft power v. Torque
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