Frequently asked questions

Atmospheric pressure influence

Pressure and temperature influence on the performance of a naturally aspirated engine. The ideal gas law The ideal gas law is the equation of state of a hypothetical ideal gas. It is a good...

What is different about the ULPower engine?

The ULPower engine is a completely new engine. It looks like some of its collegues (it actually is a boxer engine), but the detailled finishing and the electronic injection make it unique. A lot of...

Fuel requirements

The fuel system installation for the ULPower engine differs from carburettor engines. Whereas a carburettor engine will usually have only one, small diameter fuel line from the fuel tank(s) to the...

ECU reliability

How reliable is the ULPowers Engine Control Unit (ECU) system? The ECU (Engine Control Unit) used for the ULPower engine engine has been specially developed, and thoroughly tested. Every possible "...

ECU diagrams

Diagram I: 1x ECU plus 1x BATTERY This is the standard equipment. With the optional capacitor, the engine will continue to run in case of battery failure. However an engine restart in the air using...

Redundant components

Does the engine have redundant components? The ULPower engine designers have given a lot of thought to the question of where and if, to build in redundancy. In general, it is either impossible or...

No hydraulic cam followers?

Why doesn't the ULPower engine have hydraulic cam follower compensators? A modern engine and no hydraulic valve train compensation ! The decision not to use cam followers with hydraulic compensation...

ULPower Engine TBO

What is the TBO of the ULPower engine? ULPower has done very much "ground testing" and after all these tests, we decided to start with a TBO of "1000 hours". It is possible that we change the TBO in...

First installations

What were the first aircraft to fly with the ULPower engine? Mission M106 The first aircraft to be fitted with the UL260i was the Mission M106 (a high wing tube and fabric 2-seater) which is based at...

Monitor CHT & EGT?

Why monitor all CHT's and EGT's ? In an air-cooled engine, we think it is important to monitor all cylinder head temperatures (CHT's) and exhaust gas temperatures (EGT's), not just one. Many pilots...

In flight alternator fail?

What if my alternator fails in flight ? To answer this question we performed a test with the ULPower engine on the dyno and its' alternator not connected to the battery. Before starting the small...

Air cooled engine

Why not water cooling for the ULPower engine ? In the design of any aero engine, weight and reliability are all important . Every component not used, is one which can not fail. Eliminating the need...

Oil consumption

What is the oil consumption of the ULPower engine ? The oil consumption of the ULPower engine (and of any engine) is dependant on a number of factors: The general condition of the engine condition of...

Jabiru engine mount compatibility

Is the Jabiru engine mount suitable for the ULPower engine ? Although the ULPower engine has the same engine mounting points, resulting in the same thrust line and almost the same propeller flange...

Vacuum pump mount

Is there a provision to mount a vacuum pump on the ULPower engine? The back plate of the ULPower engine has provisions for the attachment of an additional accessory plate on which a mechanical vacuum...

Why no Diesel?

Why develop a gasoline aircraft engine and not a diesel? Engine Weight considerations: The real problem with diesel engines is that they are NOT light. Diesel engines capable of producing +/- 100 hp...

Alternator performance

The following graph shows the electrical current the alternator can deliver at various RPM. The red area is the maximum current needed to run the ECU and a single ignition system. Adding the red,...

FADEC

FADEC stands for Full Authority Digital Engine Control. In ULPower's case it means that the ECU (Engine Control Unit - digital computer) controls all aspects of the engine performance and decides on...