Straight-12

From Wikipedia, the free encyclopedia

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.

In the early 1970s Jaguar built a prototype straight-12 version of the famous XKE roadster called the XKEE. The hood was so long that it required a small video camera in the cockpit in order to see when driving out of an alley, and the car never made it into production.

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.

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
W	8, 12, 16, 18
Other inline	H, VR, Opposed, U (Square), X
Other	Radial, Rotary, Pistonless (Wankel)