9-092
Rear view of the 9-092 engine on display at the Technikmuseum Dessau (note:displayed upside-down)
Type Air-cooled inverted inline-four engine
Manufacturer Zündapp
First run 1938
Major applications Gotha Go 150, Siebel Si 202B
Number built c.200
Developed from Zündapp Z 9-090

The Zündapp 9–092 or Z 92 was a German four-cylinder, air-cooled, inline aero engine made by Zündapp and used in light aircraft of the late-1930s.[1]

Design and development

The engine was developed from the smaller Zündapp 9-090. This inverted engine featured dual gear-driven camshafts with the valve rocker cover acting as the oil tank. It featured a single Bosch magneto ignition system. A total of approximately 200 engines were produced.

Applications

Engines on display

  • Preserved examples of the 9-092 engine are on public display at the Deutsches Museum, Munich and Technikmuseum Dessau.

Specifications

Data from Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944[2]

General characteristics

  • Type: Four-cylinder air-cooled inverted inline piston aircraft engine
  • Bore: 85 mm (3.35 in)
  • Stroke: 88 mm (3.46 in)
  • Displacement: 2 L (122.05 cu in)
  • Length: 800 mm (31.5 in)
  • Width: 350 mm (13.8 in)
  • Height: 560 mm (22.0 in)
  • Dry weight: 60 kg (132 lb) dry, unequipped
65 kg (143 lb) wet, equipped

Components

  • Valvetrain: 1 inlet and 1 exhaust under-head valve per cylinder driven by pushrods and rockers
  • Fuel system: Downdraught carburettor
  • Fuel type: 78 Octane gasoline
  • Oil system: pressure feed at 0.2–0.35 atm (2.9–5.1 psi; 0.20–0.35 bar)
  • Cooling system: Air-cooled

Performance

  • Power output:
  • 50 PS (49 hp; 37 kW) at 2,300 rpm (30 minutes) at sea level
  • 45 PS (44 hp; 33 kW) at 2,225 rpm (max. continuous) at sea level
  • 40 PS (39 hp; 29 kW) at 2,150 rpm (cruise) at sea level

See also

Comparable engines

Related lists

References

  1. Flight - 'The Belgrade Show' - 9 June 1938, p. 561. Retrieved: 18 December 2012
  2. Schneider, Helmut (Dipl.Ing.) (1944). Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944 (in German) (Facsimile reprint 1986 ed.). Leipzig: Herm. Beyer Verlag. p. 419. ISBN 381120484X.

Further reading

  • Gersdorff, Kyrill von; Schubert, Helmut; Ebert, Stefan. Flugmotoren und Strahltriebwerke : Entwicklungsgeschichte der deutschen Luftfahrtantriebe von den Anfängen bis zu den internationalen Gemeinschaftsentwicklungen (in German) (4. erg. und erw. Aufl ed.). Bernard & Graefe. ISBN 978-3-7637-6128-9.


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