Quote:
Originally Posted by edgemar
Question for you guys:
If you fly into icing conditions while descending to an airport and you forget to turn the auto-ignition on and the engines flame out (due to icing) is it possible to re-light them while still flying in those conditions?
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I doubt any of that is possible for a number of reaons
1 You are already descending and that means you already gave up altitude (energy) to relight your Jet engine
To my knowledge, Jet engines don't relight in the air from an APU but from windmilling in the airflow
2 The fact that a jet engine would flame out is already extreme.
It would mean the fanblades already became so laden with ice they lost their ability to push air.. Which means they will also not spin properly in the airflow which is key to getting them to relight.
3 Your wings will at that point already be iced up as well to the point where they are draggy and unable to provide lift.
Every second your engines are flamed out, your wings are icing up to the point where even the working deicing system won't manage to overcome the ice
So I'de say , no , in your scenario, you won't be able to relight and you are on your way to your maker.
Note : not a rated pilot of any kind, just basing myself off numerous sources and making an educated guess.
https://skybrary.aero/articles/high-level-ice-crystal-icing-effects-engines
They don't discuss them flaming out, just vibrations and loss of thrust.