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Old 18 April 2018, 03:27 PM
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GenYus234 GenYus234 is offline
Join Date: 02 August 2005
Location: Mesa, AZ
Posts: 26,695

FAR Part 25 covers the standards for aircraft used by an airline. It requires that aircraft be able to withstand negative g forces of at least -1.0. While inverted flight is not exactly the same as having a negative load factor, the same design that allows for maneuvers that would subject the aircraft to negative g forces would probably allow it to survive inverted flight.
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