Sauer S 2400 UL

The Sauer S 2400 UL is a 4 stroke aircraft engine for homebuilt and ultralight aircraft.^[1][2]

Sauer S 2400UL
Type	Horizontally opposed piston engine
National origin	Germany
Manufacturer	Sauer Flugmotorenbau GmbH
Major applications	Ultralights and Experimental Aircraft
Developed from	Volkswagen air-cooled engine or the Volkswagen Wasserboxer engine

Design and development

The engine is based on the Volkswagen air-cooled engine or the Volkswagen Wasserboxer 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] The engine can be delivered with aluminium or magnesium casing (Wasserboxer-casing or the casing from the beetle engine), where the aluminium casing weighs 7 kg more.

Applications

• Groppo Trial

Specifications (variant)

General characteristics

• Bore: 94mm
• Stroke: 84mm
• Displacement: 2332cc
• Dry weight: 68 or 75 kg depending on casing

Components

• Valvetrain: Single overhead exhaust valve, single overhead inlet valve per cylinder
• Fuel system: Bing carburetor with altitude compensation
• Fuel type: min 95/98 RON
• Cooling system: Air-cooled

Performance

• Power output: 100hp at 3500 rpm
• Compression ratio: 7.9:1

See also

• Sauer engines