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The Santa Maria in 2008. The Santa Maria Ship & Museum was a museum ship in downtown Columbus, Ohio.The craft was a full-size replica of the Santa María, one of three ships Christopher Columbus used in 1492 during his first voyage to the Americas.
Rolls-Royce Kamewa 90SII waterjets of a Hamina-class missile boat. AB Karlstads Mekaniska Werkstad (trans. Karlstad Mechanical Works Ltd), known as Kamewa, was a Swedish manufacturing company in the city of Kristinehamn. Kamewa started as a brand name of the controllable-pitch propellers manufactured by KMW.
The ship's propulsion mechanisms were next installed, consisting of a single four-bladed, 14-foot (4 m) diameter, 19-foot (6 m) pitch propeller, the two reciprocating triple-expansion steam engines (with three cylinders of 26-inch (66 cm), 42-inch (107 cm) and 70-inch (178 cm) diameters in a common frame with a 42-inch (107 cm) stroke ...
The primary difference between internal drive boats and external drive boats is that the propeller is enclosed inside the hull of an internal drive boat whereas the propeller is exposed outside the hull of a stern drive, V-drive or straight shaft drive boat. A conventional screw propeller accelerates a large volume of water by a small amount ...
[clarification needed] The choice between using thrusters or traditional propellers to propel marine vessels is a compromise between versatility and efficiency. Propellers are designed to work in-line with a propulsion plant and produce one-directional thrust while thrusters are more customizable and have a more versatile application.
An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method of propelling small watercraft.