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The ULPower UL520i is a Belgian aircraft engine, designed and produced by ULPower Aero Engines of Geluveld for use in homebuilt aircraft.[1]

UL520i
Type	Aircraft engine
National origin	Belgium
Manufacturer	ULPower

Design and development

The engine is a six-cylinder four-stroke, horizontally-opposed, 5,254 cc (320.6 cu in) displacement, air-cooled, direct-drive, gasoline engine design. It employs dual electronic ignition and produces 180 to 200 hp (134 to 149 kW) at 3300 rpm.[1]

Variants

UL520i

Base model with fuel injection and a compression ratio of 8:1, producing 180 hp (134 kW) at 3300 rpm[1][2]

UL520iS

Model with 8.7:1 compression ratio, fuel injection, producing 200 hp (149 kW) at 3300 rpm[3]

UL520iST

Model under development, fuel injection, turbo-normalizer, producing 220 hp (164 kW) at 2700 rpm sea level[4]

UL520iSA

Inverted oil system version of the UL520iS, producing 200 hp (149 kW) at 3300 rpm[5]

UL520iHPS

Model under development[6]

UL520iSRR

Model with reversed rotation, 8.7:1 compression ratio, fuel injection, producing 200 hp (149 kW) at 3300 rpm[7]

Applications

• Whisper X350 Generation II
• DarkAero 1[8]

Specifications (UL520i)

Data from Tacke and manufacturer[1][2]

General characteristics

• Type: Six-cylinder, four-stroke aircraft engine
• Bore: 105.6 mm (4.2 in)
• Stroke: 100 mm (3.9 in)
• Displacement: 5,254 cc (320.6 cu in)
• Length: 723 mm (28.5 in)
• Width: 736 mm (29.0 in)
• Height: 472 mm (18.6 in)
• Dry weight: 108 kg (238.1 lb), ready to fly

Components

• Fuel system: fuel injection
• Fuel type: gasoline
• Cooling system: air
• Reduction gear: none

Performance

• Power output: 180 hp (134 kW) at 3300
• Compression ratio: 8:1

See also

Aircraft of comparable role, configuration, and era

• CAMit 3300
• Jabiru 5100

Related lists

• List of aircraft engines

References

External links

• Official website

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