Thanks guys. I know it's kind of hard to understand exactly.
I don't get the point those VGs could reduce the noise of airflow hit the shield at the cruise velocity.
and also those VGs will energize the airflow, which makes the velocity further at a high number. Hense it will hit the shield at a more higher speed!.
I didn't know not all NGs are not fitted with these VGs, thanks for you info.
anyhow if really it reduces cockpit noise, why other airliners do not adopt that? is it Beoing patient?
I am still struggling to find the answers! but always end up with only with questions!
Thank guys
cheers!
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