In 1825 Jacob Perkins, of Massachusetts, after he took up his residence in England, patented a plan for propelling ... Every one of the Atlantic propeller ships, the only really well tried and ...
The Alaska Marine Highway System canceled plans to replace controllable-pitch propellers aboard the state ferry Columbia next ...
Lusitania and her sister-ship Mauretania were originally fitted with three-bladed propellers. In 1908 Mauretania had a new set of four-bladed propellers fitted, which immediately improved her speed.
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