Systems for generating thrust for ships and boats on water
For the operation of ship engines, see Engine department (ship). For the design of ships, see Naval architecture.
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Rolls-Royce Marine Spey, a gas turbine developed by Rolls-Royce Holdings in the 1960s for marine propulsion.
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller, or less frequently, in pump-jets, an impeller. Marine engineering is the discipline concerned with the engineering design process of marine propulsion systems.
V12 marine diesel engines
Human-powered paddles and oars, and later, sails were the first forms of marine propulsion. Rowed galleys, some equipped with sail, played an important early role in early human seafaring and warfares. The first advanced mechanical means of marine propulsion was the marine steam engine, introduced in the early 19th century. During the 20th century it was replaced by two-stroke or four-stroke diesel engines, outboard motors, and gas turbine engines on faster ships. Marine nuclear reactors, which appeared in the 1950s, produce steam to propel warships and icebreakers; commercial application, attempted late that decade, failed to catch on. Electric motors using battery packs have been used for propulsion on submarines and electric boats and have been proposed for energy-efficient propulsion.[1]
A marine steam turbine manufactured by MAN Energy Solutions
Development in liquefied natural gas (LNG) fueled engines are gaining recognition for their low emissions and cost advantages. Stirling engines, which are quieter, smoother running, propel a number of small submarines in order to run as quietly as possible. Its design is not used in civilian marine application due to lower total efficiency than internal combustion engines or power turbines.
^"Energy Efficient - All Electric Ship". Archived from the original on May 17, 2009. Retrieved November 25, 2009.
Marinepropulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some...
Nuclear marinepropulsion is propulsion of a ship or submarine with heat provided by a nuclear reactor. The power plant heats water to produce steam for...
frequently, in jet drives, an impeller. Marine engineering is the discipline concerned with the design of marinepropulsion systems. Steam engines were the first...
on the principle of jet propulsion include the jet engine used for aircraft propulsion, the pump-jet used for marinepropulsion, and the rocket engine...
as its marinepropulsion system. The integration of a steam engine into a watercraft to create a marine steam engine was the start of the marine engineering...
An inboard motor is a marinepropulsion system for boats. As opposed to an outboard motor where an engine is mounted outside the hull of the craft, an...
forward. Studies examining MHD in the field of marinepropulsion began in the late 1950s. Few large-scale marine prototypes have been built, limited by the...
Retrieved 2019-12-04. "Propeller Propulsion". NASA. May 5, 2015. Carlton, John (2012), Marine Propellers and Propulsion, Butterworth-Heinemann, p. 363....
Astern propulsion (as applied to a ship) is a maneuver in which a ship's propelling mechanism is used to develop thrust in a retrograde direction. Astern...
Berg Propulsion is a Swedish company that designs and manufactures controllable-pitch propellers for the marine industry. The company produces customized...
inspections revealed stress-cracking. This did not reflect poorly on the marine-propulsion gas-turbine concept though, and the trial was a success overall. The...
electric propulsion (IEP), full electric propulsion (FEP) or integrated full electric propulsion (IFEP) is an arrangement of marinepropulsion systems...
Azipod is a trademarked azimuth thruster pod design, a marinepropulsion unit consisting of a fixed pitch propeller mounted on a steerable gondola ("pod")...
Volvo Penta is a Swedish marine and industrial engine manufacturer, a joint stock company within the Volvo Group. Volvo Penta was founded as Penta in 1907...
Steerprop Oy is a Finnish company that produces marinepropulsion equipment such as azimuth thrusters and bow thrusters. The company was established in...
A marine thruster is a device for producing directed hydrodynamic thrust mounted on a marine vehicle, primarily for maneuvering or propulsion. There are...
A propulsor is a mechanical device that gives propulsion. The word is commonly used in the marine vernacular, and implies a mechanical assembly that is...
A sterndrive or inboard/outboard drive (I/O) is a form of marinepropulsion which combines inboard power with outboard drive. The engine sits just forward...
operated by Fluor MarinePropulsion Corporation, a subsidiary of Fluor Corporation. Previously operated by Bechtel MarinePropulsion Corporation, a wholly...
multiple designs of light-water reactor designs suitable for nuclear marinepropulsion for Indian Navy submarines beginning with the CLWR-B1 reactor design...
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