The ULPower UL520i is a

Belgian Belgian may refer to: * Something of, or related to, Belgium * Belgians, people from Belgium or of Belgian descent * Languages of Belgium, languages spoken in Belgium, such as Dutch, French, and German *Ancient Belgian language, an extinct languag ...

aircraft engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Most aircraft engines are either piston engines or gas turbines, although a few have been rocket powered and in recent years ma ...

, designed and produced by ULPower Aero Engines of Geluveld 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 direct ...

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, wh ...

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

electronic ignition An ignition system generates a spark or heats an electrode to a high temperature to ignite a fuel-air mixture in spark ignition internal combustion engines, oil-fired and gas-fired boilers, rocket engines, etc. The widest application for spark i ...

and produces at 3300 rpm.

Variants

;UL520i :Base model with fuel injection and a

compression ratio The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values. A fundamental specification for such engines, it is measured two ways: the stati ...

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 The Whisper X350 Generation II is a South African amateur-built aircraft, designed in 2015 and produced by Whisper Aircraft of Mossel Bay. The aircraft was developed from the 2004-designed Whisper Aircraft Whisper motorglider. The X350 Gene ...

* DarkAero 1

Specifications (UL520i)

References

External links