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Old Jul 25, 2005 | 4:39 pm
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LarryJ
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Originally Posted by Flaflyer
At 40,000 feet, WHAT ambient air?
If there were no air then the AIRplane would not fly.

If there were no air then the jet engines would not run.

If there were no air then their would be no air to compress to pressurize the cabin.

Roughly half of the atmosphere is below 18,000'. Most, but not quite all, of the atmosphere is below 100,000'.
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