Straight-seven engine

A straight-seven engine or inline-seven engine is a straight engine with seven cylinders. It is more common in marine applications because these engines are usually based on a modular design, with individual heads per cylinder.

Marine engines

Straight-seven engines produced for marine usage include:

Wärtsilä-Sulzer RTA96-C two-stroke crosshead diesel engine^[1]
Wärtsilä 32 trunk piston engines^[2]
MAN Diesel IMO two-stroke crosshead diesel engine^[3]
Burmeister & Wain 722VU37 two-stroke diesel engine (commenced 1937, used in the Danish Havmanden-class submarines
Sulzer 7QD42 diesel engine (1939-1940, used in the Dutch O 21-class submarines).^[4]

Land use

The AGCO Sisu 98HD is a straight-seven diesel engine that was released in 2008.^[5] Intended for farming machinery, the engine shares various components with the company's straight-six engine.^[6]

References

^ "Wärtsilä RT-flex 82T".
^ "Wärtsilä 32".
^ "MAN Diesel Marine Engine IMO Tier I Programme". Archived from the original on 2011-03-10. Retrieved 2011-03-07.
^ Cummins, C. Lyle Jr. (2007). Diesels for the First Stealth Weapon. Carnot Press. p. 405,464. ISBN 978-0-917308-06-2.
^ "7-Cylinder - AGCO Sisu Power". Archived from the original on 7 July 2011.
^ "AGCO SISU POWER launched new innovative 7-cylinder 9,8 litre engine". 10 September 2008. Archived from the original on 4 March 2016.

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[1] "Wärtsilä RT-flex 82T".

[2] "Wärtsilä 32".

[3] "MAN Diesel Marine Engine IMO Tier I Programme". Archived from the original on 2011-03-10. Retrieved 2011-03-07.

[4] Cummins, C. Lyle Jr. (2007). Diesels for the First Stealth Weapon. Carnot Press. p. 405,464. ISBN 978-0-917308-06-2.

[5] "7-Cylinder - AGCO Sisu Power". Archived from the original on 7 July 2011.

[6] "AGCO SISU POWER launched new innovative 7-cylinder 9,8 litre engine". 10 September 2008. Archived from the original on 4 March 2016.

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