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

climbing the extra 15k feet adds a pretty negligible amount of straight line travel and time. if you only climb to 15k and I climb to 30k, I’m probably going to get there first unless you burn a lot more fuel to just barely beat me there.

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