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Old 06-29-2002, 11:00 PM   #1
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Default Jet Engine Noise!

Today I heard what I thought were turboprop engines - like a big Herkie or something flying over. I look up and to my surprise it's an American Airlines MD-80 or -90 with big fat jet engines! Now I have never heard a pure jet plane sound like that. Very quiet for such a plane especially compared to the NW DC-9s that still fly here.
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Old 06-30-2002, 01:07 AM   #2
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Hmmm. (no pun intended) I'm not well-versed in the MD twinjet series, but believe the MD-90 has higher-bypass fans than the MD-80. Hence, the larger nacelle and characteristic hum of very large bypass engines.
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