Why do Aeroplanes need to go so high to travel?

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I hope I convey my point probably, but why do planes go so many thousands of feet in the air? Is it faster that way, or could they achieve similar flight times at a lower altitude?
Does it have something to do with the curvature of the earth?

In: Engineering

34 Answers

Anonymous 0 Comments

The really high airspace is more controlled, has less traffic, and the higher altitude provides the pilots with more glide distance in the event of engine failure

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