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MEO Class II – NAVAL : 2022/SEP/08
Question

Q8. (a) List the variables which affect the force on Rudder (6)

b) A ship of 12000 tonne displacement has a rudder 15 m2 in area, whose centre is 5 m below the waterline. The metacentric height of the ship is 0.3 m and the centre of buoyancy is 3.3 m below the waterline. When travelling at 20 knots the rudder is turned through 30 degree. Find the initial angle of heel if the force Fr perpendicular to the plane of the rudder is given by:

Fr=577Av2 Sin N

Allow 20% for the race effect. (10)

Asked in Year/Month/Ques No.
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