A straight-10 engine or inline-10 engine is a ten-cylinder internal combustion engine with all ten cylinders mounted in a straight line along the crankcase. A straight-10 is a very long engine for its displacement, and as a result, has never been fitted to an automobile.
Large ten-cylinder engines are common on large ships, such as container ships. The MAN B&W 10K90MC-C (pictured) is an example of such an engine, and it is capable of developing a maximum power output of 58,600 brake horsepower (43,700 kW) at a speed of 104 revolutions per minute (rpm). Like the vast majority of marine diesel engines, it is capable of running on diesel or heavy fuel oil, the latter of which is used most often.
Railway and stationary use
Ten-cylinder two-stroke inline engines were widely used in USSR, mostly on diesel locomotives and as back-up power sources in Soviet military. Most known engines are:
- 2D100 (2000 hp@850 RPM, 207mm bore diameter, 254mm displacement, naturally aspirated) - was used on TE3 series of cargo locomotives that are no longer in service.
- 10D100 (3000 hp@850 RPM, 207mm bore diameter, 254mm displacement, supercharged) - used on TE10 series of cargo locomotives, currently being replaced with 4-stroke V16 diesel engines.
- 7D100 (same as 2D100, used as a backup power source on a nuclear weapons and other mission-critical facilities).
These engines produce very distinct "two-stroke" sound and are famous for the smoke they produce at full load.