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by buildsjets
31 days ago
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The -8 also has a lower maximum certified altitude than the -400. The -400 can go to 45,100 feet, the -8 is limited to 43,100 feet. This is actually because the -8 wing is MORE efficient than yhe -400. There is a regulation that in case of a pressurization failure the airplane has to be able to descend below 15,000 feet in a certain time. The -8 wing has less drag, so it is easier to overspeed in descent, and they had to limit the maximum operation altitude to compensate. |
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