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The Italian cruise liner SS Principessa Mafalda sank when a propeller shaft broke and fractured the hull, resulting in 314 deaths.
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SS Principessa Mafalda
Italian ocean liner, sunk 1927, 314 dead
SS Principessa Mafalda was an Italian transatlantic ocean liner built for the Navigazione Generale Italiana (NGI) company. Named after Princess Mafalda of Savoy, second daughter of King Victor Emmanuel III, the ship was completed and entered NGI's South American service between…Source: Wikipedia (CC BY-SA)
Propeller
Device that transmits rotational power into linear thrust on a fluid
A propeller is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working fluid such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to…Source: Wikipedia (CC BY-SA)