title: Straight-nine engine
text: # Straight-nine engine
  
  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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