Sulzer ZG9

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Sulzer ZG9 was a pre-World War II opposed-piston two-stroke diesel engine by Sulzer.[1][2] The engine was available with a choice of two, three and four cylinders (2ZG9, 3ZG9, 4ZG9); the two-cylinder version developed 120 bhp. It used a piston scavenge pump. This was mounted vertically above one rocker, driven by a bellcrank from the main rockers. This engine is sometimes cited as an inspiration for the Commer TS3 design.[3]

## Specification

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Data from [1]

### General characteristics

* Type: Two cylinders, four opposed pistons.
* Bore: 90 mm
* Stroke: 120 mm

### Performance

* Power output: 50 PSe / 36,77 kW [4] at 1,500 rpm

## See also

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* Arrol-Johnston \- 1905 opposed piston petrol engine
* Commer TS3
* Junkers Jumo 204 \- an opposed-piston aircraft engine of the 1930s
* Napier Deltic \- large multi-bank engine, with crankshafts shared between cylinder banks.

## References

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1. ^ a b Chapman, C.W. (1956). Modern High-Speed Oil Engines. Vol. I (2nd ed.). Caxton. pp. 222–223.
2. ^ Williams, D.S.D.; Millar Smith, J. (1939). The Oil Engine (journal) (ed.). The Oil Engine Manual. London: Temple Press. pp. 120–121.
3. ^ "Rootes-Lister TS3". www.oldengine.org. Archived from the original on 2016-05-02. Retrieved 2012-09-23.
4. ^ Abdelfattah, A.I.Ibrahim (1951). Versuche an einem raschlaufenden Zweitakt-Gegenkolben-Dieselmotor (Thesis). ETH Zurich. doi:10.3929/ethz-a-000091415. hdl:20.500.11850/133240.