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The Sauer S 1800 UL is a four stroke aircraft engine designed for homebuilt and ultralight aircraft.[1][2]

Sauer S 1800 UL
Type	Horizontally opposed piston engine
National origin	Germany
Manufacturer	Sauer Flugmotorenbau GmbH
Major applications	Ultralight and homebuilt aircraft
Developed from	Volkswagen air-cooled engine

Design and development

The engine is based on the Volkswagen air-cooled engine. It is extensively modified for aircraft use and all the parts are custom made. The engine is derived from the certified engines produced by the same manufacturer and used in several motorgliders and small aircraft.[1]

Applications

• Alpi Pioneer 200[3]

Specifications (variant)

General characteristics

• Bore: 92mm
• Stroke: 69mm
• Displacement: 1835cc
• Dry weight: 63 kg

Components

• Valvetrain: Single overhead exhaust valve, single overhead inlet valve per cylinder
• Fuel system: Bing carburetor with altitude compensation
• Fuel type: min 95 RON
• Cooling system: Air-cooled

Performance

• Power output: 68hp at 3200 rpm
• Compression ratio: 8.5:1

See also

• Sauer Engines

References

External links

• Official website

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