Step aboard any Boeing 737, shut the door, and watch the world outside shrink behind double-paned windows. As the big jet climbs, its cabin pressurization system begins to invisibly pump steadily more ...
Modern business aircraft efficiently cruise as high as 51,000 feet, where the outside air pressure is 89-percent less than that at sea-level and the temperature is a decidedly brisk -56.5°C (-87.7°F).
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