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A straight-14 engine or inline-14 engine is a fourteen-cylinder internal combustion engine with all fourteen cylinders mounted in a straight line along the crankcase. A straight-14 is a very long engine, and therefore only suitable for marine engineering installations in large ships.
The only engine of this type known to have been built is a member of the Wärtsilä-Sulzer RTA96-C family. It is a huge two-stroke diesel engine for use in container ships. The engine became well-known due to photos taken at the Aioi Works in Japan, which subsequently spread through blogs.
The 14-cylinder version of this modular engine displaces 25,480 litres (25,480,000 cc) (1,556,002 in³), with a 38 inches (965 mm) cylinder bore and 98 in (2,489 mm) piston stroke. The engine is 89 feet (27.1 m) long, 44 ft (13.4 m) high, and weighs 2,300 tonnes (2,264 LT; 2,535 ST) (2,300,000 kilograms).
If built, the 14-cylinder variant of the MAN B&W K108ME-C would be even larger at nearly 33 metres (108 ft) long, and over 2,800 tonnes (2,756 LT; 3,086 ST), and more powerful at 97,300 kilowatts (130,481 hp).
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