MEO Class II – NAVAL : 2012/APR/07 – 2012/AUG/09 – 2015/AUG/08 – 2022/DEC/08 – 2023/OCT/08 – 2024/SEP/08 – 2024/NOV/08
Question
Q8. A. Describe the fundamental principle of a 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 0.30. 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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