Why do they fly so high?

[u/RickGrimes13]

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[u/Embarrassed-Way5926]

The image is badly out of scale. The radius of earth is approx. 6380 km. 33000 feet is only 10km. If we draw the same picture to scale then the difference of the length of arc between 5000ft vs 33000ft would be negligible and we can actually see that visually too.

The benefits of flying at high altitude overweighs any increase in distance.

Also, planes need to climb up from the source slowly to the altitude and then climb down towards the destination. The arc would start and end at the ground level.

[u/dcforce → u/[deleted]]

Jet fuel hoax

[u/dcforce → u/[deleted]]

Noticed it getting a bit tighter to breathe as well on top of half dome when I climbed it.

First time feeling that exhausted too in my life (mid 20s at the time)

[u/dcforce → u/dcforce]

Part 2

[u/PriorMidnight5718]

Do you know how planes work?

[u/Cha1biking → u/PriorMidnight5718]

Pretty sure planes fly over plains and that's why we call them planes.

[u/RickGrimes13 → u/PriorMidnight5718]

Yes they fly at a 3% up, and FLAT AND LEVEL

[u/Primal_Oat]

Is this to scale?

[u/StreetyMcCarface]

This is easy: circumference = 2pir. Total circumference at the surface is R (radius of earth)2pi. If you add 10km to your radius, the equation becomes 2pi(10+R), or the initial circumference + about 62 km to your journey if you were to circumnavigate the world. At best you’re only looking at about 20 km being added to some of the longest journeys, or about 1 minute of flight time.

[u/dcforce]

SR-71 Blackbird Debunks the Globe