A straight-14 engine or inline-14 engine is a fourteen-cylinder

piston engine A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common fea ...

with all fourteen cylinders mounted in a straight line along the

crankcase In a piston engine, the crankcase is the housing that surrounds the crankshaft. In most modern engines, the crankcase is integrated into the engine block. Two-stroke engines typically use a crankcase-compression design, resulting in the fuel/ ...

. This design results in a very long engine, therefore it has only been used as

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 elect ...

engines in large ships. The only straight-14 engine known to reach production is part of the

Wärtsilä-Sulzer RTA96-C The Wärtsilä RT-flex96C is a two-stroke turbocharged low-speed diesel engine designed by the Finnish manufacturer Wärtsilä. It is designed for large container ships that run on heavy fuel oil. Its largest 14-cylinder version is 13.5 meter ...

family of 6-cylinder to 14-cylinder two-stroke marine engines. This engine is used in the

Emma Mærsk ''Emma Mærsk'' is the first container ship in the of eight owned by the A. P. Moller-Maersk Group. When launched in 2006, she was the largest container ship ever built, and in 2010 she and her seven sister ships were among the longest ...

, which was the world's largest

container ship A container ship (also called boxship or spelled containership) is a cargo ship that carries all of its load in truck-size intermodal containers, in a technique called containerization. Container ships are a common means of commercial intermoda ...

when it was built in 2006. The engine produces and displaces , has a bore of and a stroke of . The engine is long, high and weighs .

References

Straight-14 14-cylinder engines 14 {{Automobile-stub