Date: 19 Feb 97 02:46:21 From: email@example.com (Charles Platt) Organization: PANIX Public Access Internet and UNIX, NYC Followups: 1
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Recently enjoyed my first flight on an A320 (via America West, out of Newark) and noticed a prolonged groaning noise that began shortly after takeoff while the engines were running at high power. The noise sounded like the kind of groan you sometimes hear briefly when wheels are retracted (if you're sitting right over the wheel wells), but it lasted 5 to 10 minutes, finally fading away when the angle of ascent leveled off. The noise returned during descent and lasted another 5 to 10 minutes. I have heard a kind of "buzz" from engines or resonating airframe on a 747 when it climbs after takeoff, but I'd never heard anything like this groaning sound before. Is it a well-known feature of the Airbus, and if so, does anyone know what causes it? I'm just curious.