The ULPower UL520i is a Belgian

aircraft engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Aircraft using power components are referred to as powered flight. Most aircraft engines are either piston engines or gas turbin ...

, designed and produced by ULPower Aero Engines of

Geluveld Zonnebeke (; ) is a municipality located in the Belgian province of West Flanders. The municipality comprises the villages of , , Passendale, Zandvoorde and Zonnebeke proper. On January 1, 2006, Zonnebeke had a total population of 11,758. The to ...

for use in

homebuilt aircraft Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenn ...

.Tacke, Willi; Marino Boric; et al: ''World Directory of Light Aviation 2015-16'', pages 262-263. Flying Pages Europe SARL, 2015.

Design and development

The engine is a six-cylinder

four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...

horizontally-opposed A flat engine is a piston engine where the cylinders are located on either side of a central crankshaft. Flat engines are also known as horizontally opposed engines, however this is distinct from the less common opposed-piston engine design, ...

, displacement, air-cooled, direct-drive, gasoline engine design. It employs dual

electronic ignition Ignition systems are used by heat engines to initiate combustion by igniting the fuel-air mixture. In a spark ignition versions of the internal combustion engine (such as petrol engines), the ignition system creates a spark to ignite the fuel-air ...

and produces at 3300 rpm.

Variants

;UL520i :Base model with fuel injection and a

compression ratio The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine. A fundamental specification for such engines, it can be measured in two different ways. Th ...

of 8:1, producing at 3300 rpm ;UL520iS :Model with 8.7:1 compression ratio, fuel injection, producing at 3300 rpm ;UL520iST :Model under development, fuel injection, turbo-normalizer, producing at 2700 rpm sea level ;UL520iSA :Inverted oil system version of the UL520iS, producing at 3300 rpm ;UL520iHPS :Model under development ;UL520iSRR :Model with reversed rotation, 8.7:1 compression ratio, fuel injection, producing at 3300 rpm

Applications

* Whisper X350 Generation II * DarkAero 1

Specifications (UL520i)

References

External links