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A comment on A380 cancellations by Qantas raise new questions about the superjumbo's future. Parent comment

Re:A380 cancellations by Qantas raise new questions about th... by FabHK on Thursday February 07, 2019 @07:02PM (#19109949)
Also, aircraft are certified to be able to complete take-off with one engine failure.

Thus, twin engines have to have basically 100% reserve, while the 4 engines only need to have 33% reserve (to make up for one engine failing).

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Re:A380 cancellations by Qantas raise new questions about th... by youngtaff on Friday February 08, 2019 @04:14AM (#19112616)
Norwegian currently have a 787 stuck in Iran with a broken engine, so I'm not sure they can take off with only one engine
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Re:A380 cancellations by Qantas raise new questions about th... by FabHK on Friday February 08, 2019 @06:39AM (#19113317)
From what I gather, certification requires that they can take off successfully if an engine fails during the take-off run (after V1). I doubt that they're allowed to leave with half the engines inoperational already.
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Re:A380 cancellations by Qantas raise new questions about th... by youngtaff on Friday February 08, 2019 @08:05AM (#19113737)
With you… like this Thomson plane that had a failure due to bird ingestion during take off at Manchester - https://www.youtube.com/watch?v=9KhZwsYtNDE
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