Straight-12

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A Straight-12 engine is a Straight engine with twelve cylinders. A straight-12 is a very long engine, and therefore straight-12 engines are not common in automobiles, but it has been used for large military trucks. Also some Russian firms built straight-12s for use in boats in the 1960s and 1970s.

The Wärtsilä-Sulzer RTA96-C, the largest reciprocating engine in the world as of 2006, is a straight-12. It is used on container ships.

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Reciprocating engines and engine configurations
Straight
Single · 2 · 3 · 4 · 5 · 6 · 8 · 9 · 10 · 12 · 14
Flat
2 · 4 · 6 · 8 · 10 · 12 · 16 · H
V
2 · 4 · 5 · 6 · 8 · 10 · 12 · 16 · 18 · 20 · 24
W
8 · 12 · 16 · 18
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