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Maximum allowable clearance for a propeller shaft bearing is 2% of the shaft diameter. E.g. for a shaft with a diameter of 50 mm; the maximum clearance allowed is 1 mm. This is a general rule of thumb which works for most bearing types. Different tolerances might be used for specialized...

All of a sudden everybody seems to be a subject matter expert on cruise ships. If you don't know the facts, it's better to refrain from saying/writing anything. Cruise ships have only accounted for 0.07% of all Covid-19 cases. Cruise ships happen to have the highest and most strictest of...

With a proper engine room design you can still have a twin engine configuration with ample room around the engines. The problem is that the people who design the engine room and the ones that have to perform maintenance are not the same and have very different opinions of how much space is...

Hi, I'm new to this interesting forum. I'm looking into buying a Halvorsen 32 Gourmet Cruiser. Year of built is 2004. According to the broker the boat has been built at Yardway Marine in Taiwan. The boat is out of the water right now and the underwater hull looks solid. However in talking with...