Straight-nine engine
Piston engine with nine cylinders in a straight configuration
The straight-nine engine (also referred to as an inline-nine engine; abbreviated I9 or L9) is a piston engine with nine cylinders arranged in a straight line along the crankshaft. The most common application is for large diesel engines used by ships.
Examples of straight-nine engines include:
- Rolls-Royce Bergen B, C and K series
- Wärtsilä RT-flex60C-B, RT-flex82C, RTA84T-D, RTA84C, RTA96C, 20, 26, 32, Wasa32LN, 38, 46 and 46F series
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Engine configurations for piston engines
- Atmospheric
- Axial
- Beam
- Cornish
- Rotative
- Bourke
- Cam engine
- Camless
- Compound
- Double-acting cylinder
- Flathead
- Free-piston
- Stelzer
- Hemi
- Heron head
- Intake over exhaust
- Oscillating cylinder
- Opposed-piston
- Overhead camshaft
- Overhead valve
- Pentroof
- Rotary
- Single-acting cylinder
- Split cycle
- Swing-piston
- Uniflow
- Watt
- Wedge
| Inline / straight | |
|---|---|
| Flat / boxer | |
| V / Vee | |
| W | |
| Other |
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