jimbobjoe
Posts: 453
Joined: Mon Oct 08, 2001 2:04 pm

### Question Concerning Distances In Air

I hope that this question has not been answered before...but I dunno how to search for it.

It's also weird to explain...so I have provided a drawing.

In my little drawing, A and B are cities. The line X is a line approximating the distance if you were to drive from A to B.

Line Y is approximating the distance if you were to fly from A to B at some sorta altitude. And finally line Z is approximating the distance of flying from A to B at some sorta altitude which is much higher than that at which line Y is.

With this in mind, I've come to the conclusion that there is a longer distance involved the higher the altitude. My question is, how significant is this longer distance? In particular, in airline terms, is the distance all that much longer between a plane flying between A and B at 35,000 feet and a plane flying at 45,000 feet? How much more distance does the Concorde have to fly since it's flying at least 25,000 feet higher than anything else?

TNboy
Posts: 1115
Joined: Mon Mar 04, 2002 8:12 pm

### RE: Question Concerning Distances In Air

Sometimes the altitude can be determined by the prevailing winds. For example, a flight of 1000km(or miles) at 30 000ft with a tailwind of 50 kph can be longer (and more expensive to operate) than the same flight at 40 000ft with a tailwind of 200kph. The small difference in climb and descent becomes negligible.
"...every aircraft is subtly different.."

timz
Posts: 6309
Joined: Fri Sep 17, 1999 7:43 am

### RE: Question Concerning Distances In Air

If Concorde flew the whole London-NY trip at 60000 ft it would fly 3 or 3 1/2 miles farther than if it flew the whole trip at 40000 ft.

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