Interesting Facts About Aircraft Engines

Interesting facts about aircraft engines | Editor: Florian Lieke

The aircraft engine - more than just a simple engine! We have interviewed experts and summarised four interesting facts for you.

How powerful is an engine measured in horsepower?
Austrian Airlines aircraft engine on the apron

How Powerful Is an Engine Measured in Horsepower?

Austrian Airlines:

"From a physical point of view, the power of jet engines cannot be expressed in horsepower (hp). In the case of jet engines, we are talking about thrust in kilonewton or kilogram. However, it is possible to calculate the horsepower at least roughly to get an idea of the engine performance", explains an expert from Austrian Airlines Engineering.

Calculated in horsepower, a single engine produces:

Boeing 777

In a Boeing 777, a single engine produces 52,000 hp.

Airbus 320

In an Airbus 320, a single engine produces 16,000 hp.

Boeing 767

In a Boeing 767, a single engine produces 32,000 hp.

Austrian Airlines employees working on aircraft engine
What are colossal silencers?

What Are Colossal Silencers?

Austrian Airlines:

The "High Power Run Up" is a load test and so-called trial run for the engines. If an engine is replaced due to a defect or a general check, a High Power Run Up must first be conducted with the new engine. Only then the aircraft with the replaced engine may take off! During the High Power Run Up, the engines are accelerated strongly during idle time. It can get so loud that colossal silencers come into play.

Colossal silencers of an Austrian Airlines aircraft engine

The airflow of the engines is dampened and above all deflected by the silencers. On larger aircraft, even the silencers are not sufficient due to the power of the engines. In such cases, the load tests are conducted at the boundary of the airport, where no damage can occur.


By the way: Replacing an engine can take up to 24 hours!

What is a Blade Out Test?
Austrian Airlines Blade Out Test

What Is a Blade Out Test?

Austrian Airlines:

In worst cases, sucked-in foreign bodies can lead to damage or separation of a "fan blade". Foreign bodies can be birds, but also stones, screws or similar. To ensure that the torn off blade remains in the engine casing and is not flung outwards, such situations are tested during engine development. One of the most spectacular of these tests is the "Blade Out Test". In this test, a blade is blasted off at full speed to check the engine's behavior. The engine must keep the blasted off blade inside the engine casing. This test is also necessary to obtain certification.

What is the function of the white loop in the middle of the engine?

What Is the Function of the White Loop in the Middle of the Engine?

Austrian Airlines:

We asked the experts: "Actually, there's only one reason why there's a white loop in the middle of the engine: so that you can immediately see if the engine is moving." - Sounds plausible!

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White loop of an Austrian Airlines aircraft engine

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