Straight-twelve engine

File:Wolseley 12 cylinder 360hp petrol or oil marine engine (Rankin Kennedy, Modern Engines, Vol III).jpg

A 1905 Wolseley straight-12, 360 hp, petrol or oil marine engine

A straight-12 engine or inline-12 engine is a twelve-cylinder piston engine with all twelve cylinders mounted in a straight line along the crankcase.

Land use

Due to the very long length of a straight-twelve engine, they are rarely used in automobiles. The first known example is a Template:Convert engine in the 1920 French Corona car;<ref name="Encyclopedia">Template:Cite book</ref> however it is not known if any cars were sold. Packard also experimented with an automobile powered by an inline 12 in 1929.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

The straight-12 has also been used for large military trucks.Template:Citation needed

Marine use

Some Russian firms built straight-12s for use in ships in the 1960s and 1970s.

MAN Diesel & Turbo 12K98ME and 12S90ME-C and the Wärtsilä-Sulzer RTA96-C are examples of contemporary marine engines in L-12-cylinder configuration. These are popular for propulsion in container ships.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

References

<references />

Template:Automotive-part-stub Template:Mech-engineering-stub