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.
| Piston engine configurations | |
|---|---|
| Straight | Single, 2, 3, 4, 5, 6, 8, 9, 10, 12, 14 |
| V | 2, 4, 5, 6, 8, 10, 12, 16, 20, 24 |
| Flat | 2, 4, 6, 8, 10, 12, 16, H |
| W | 8, 9, 12, 16, 18 |
| Other inline | H, VR, Opposed, U (Square), X |
| Other | Hemi, Radial, Rotary, Pistonless, Deltic, (Wankel) |