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A comment on Boeing 737 Max to Resume Flying U.S. Passengers Today. Parent comment

Re:Boeing 737 Max to Resume Flying U.S. Passengers Today by tyingq on Tuesday December 29, 2020 @12:49PM (#25572470)
Ah, yes, searching a bit, you appear to be right about the flat bottom. I believe the sawtooth edge is still correct though.
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Re:Boeing 737 Max to Resume Flying U.S. Passengers Today by rawgabbit on Tuesday December 29, 2020 @05:31PM (#25575866)
The sawtooth is called a "chevron" and is designed to reduce engine noise to meet FAA standards.
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