Zündapp 9-092

9-092
	Rear view of the 9-092 engine on display at the Technikmuseum Dessau
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

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 cu in)
Length: 800 mm
Width: 350 mm
Dry weight: 60 kg (132 lb

Components

Valvetrain: Overhead valve
Fuel system: Downdraught carburettor
Cooling system: Air-cooled

Performance

Power output: 37 kw (50 hp) at 2,300 rpm
Compression ratio: 6.2:1
Power-to-weight ratio: 0.62 kW/kg (0.38 hp/lb)

References

↑ Flight - 'The Belgrade Show' - 9 June 1938, p. 561. Retrieved: 18 December 2012

Bibliography

Kyrill von Gersdorff, Helmut Schubert, Stefan Ebert: Flugmotoren und Strahltriebwerke, Bernard & Graefe Verlag München, ISBN 978-3-7637-6128-9

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[1] Flight - 'The Belgrade Show' - 9 June 1938, p. 561. Retrieved: 18 December 2012