A semi-balanced rudder has a shorter Vertical section forward of the stock, thus less counterbalance than the “balanced” rudder, but more than the unbalanced rudder. The semi-balanced rudder often need more torque than the balanced rudder. And it is a very widely used kind of rudder for modern tonnage, especially for the container type vessel and twin-screw vessels.
Favourite and SURE Questions of MMD Surveyors here
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| semi balanced rudder in action. |
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