Hello, my dears.
Our guys just returned from their lunchtime round, and I'm wondering why Eurofighters sometimes screech and hiss so loudly while flying. I haven't noticed anything like that in other aircraft. It's more like a hum.
Does anyone know the solution?
LG Sina
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The engines in combat aircraft are different.
Although turbofans are also in the Eurofighter, i.e. part of the air stream is guided around the engine core as in a propeller aircraft and does not participate in the combustion.
But at the engine of a passenger plane, about 80% of the airflow “outside” runs around the hot core… and dampens the noise coming from the hot part of the drive. In addition, the engine blades run comparatively slowly in modern engines, which also produces a noise with a lower frequency, i.e. a lower sound.
With the Eurofighter, the jacket current does not even make 1/3 of the airflow, most of the air passes through the hot core and makes noise. So there’s only a little mantle current on a large, loud nozzle. As a result, the engine becomes louder and as a result of the small diameter, the wings also rotate faster, so that a higher tone comes out.
This is the design of the aircraft and the drive. The shape (the wing) cuts the air and this keeps producing the corresponding “creic” rubbers in conjunction with the engines.
First and foremost, the noise comes from the engines
Wings do not circle they are dumb as a fish
The engines of transport machines are also optimized for low running noise, which is considered not as important in the military field.
That’s the engines. Normal planes have turbofan engines. Combat jets have turbojet engines. They’re louder
https://de.wikipedia.org/wiki/Turbinen-Strahltriebwerk#Einstrom-Strahltriebwerk_%28Turbojet%29?wprov=sfla1
Only that the EJ200 is also a turbofan in the Eurofighter;) Also with quite small secondary current.
Oh, okay. In any case, the reason