Zündapp 9-092

9-092
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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.

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

• Brunswick LF-1 Zaunkönig
• Bücker Bü 180
• Fieseler Fi 253
• Gotha Go 150
• Klemm Kl 105
• Siebel Si 202

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)

See also

Comparable engines

• ERCO I-L 116
• de Havilland Gipsy Minor
• Walter Mikron

Related lists

• List of aircraft engines

References

Bibliography

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