Rj85
Thread Starter
Joined: May 2005
Posts: 4
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From: Brussels
Rj85
Hello. I fairly regularly fly with SN Brussels Airlines (for obvious reasons) and almost always on RJ85s or similar. I have noticed that about two minutes after take-off and a similar time before landing, the aircraft lets out this rather alarming groaning sounds that last perhaps five seconds and I have often wondered what that is.
I have travelled on loads of different Airbuses, Boeings etc., but never one that consistently makes the noise that the RJ85/BAe146 makes.
What love to know what causes this.
Many thanks,
George
I have travelled on loads of different Airbuses, Boeings etc., but never one that consistently makes the noise that the RJ85/BAe146 makes.
What love to know what causes this.
Many thanks,
George
Joined: Jun 2000
Posts: 2,878
Likes: 83
From: UK
As far as I know (I'm sure someone who operates the type will correct me if I'm wrong), the noise is caused during flap deployment/ retraction. At a certain point in process, the "howl" is caused by a gap between the inboard flaps and the fuselage.
Joined: Nov 2004
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From: Faroe Islands
That is correct. The flap settings are 0, 18, 24, 30, 33. The last apr 5degrees of retraction from flap 18 to flap 0 give this charictaristic sound. The same for the first apr 5degrees when the flaps are selected from flap 0 to flap 18.
Joined: Oct 2002
Aviation Qualifications: PPL
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From: London UK
