T his route is called a geodesic or great circle. While map projections distort these routes confusing passengers, the great circle path is the shortest path between two far locations. This is why pilots fly polar routes saving time and distance. And this is why pilots often fly over Greenland. I realize that airplanes fly great circle routes that curve to the north. Is flying over Greenland unusual for this type of flight? It's very normal. It's not that the plane's route curves to the north, rather the earth is shaped like an egg and the plane is taking the most direct route over the narrowest portion of the planet.
If you check out www. No, it's quite typical that flights from the east coast of the US to Europe go over Greenland. Sorry, but the Earth is not "egg-shaped". See en. It is approximately an oblate spheroid or an oblate ellipsoid.
Across the Pacific, same idea: a flight from Los Angeles to Beijing will touch the Aleutian Islands and the easternmost portions of Russia.
One night at Kennedy airport I gave what I thought were accurate instructions to a group of Muslims crouched on the floor looking for Mecca. It seemed to me they were facing more toward Bridgeport, Connecticut, so I suggested they adjust their prayer rugs a few southeastward degrees. You can cut them at any angle — north-south, east-west, diagonally. As long as you cut two identical portions, then the circle where the cut was made is a great circle.
You could also cut it at the north and south poles. This longitudinal line also cuts two equal portions. Any meridian line is a great circle as well. A great circle generates two arcs with the shorter one being the shortest path. Here is the shortest path and how the plane is angled to create the shortest path. While a rhumb line track is at a constant azimuth, a geodesic line changes direction all the time.
Planes travel along the shortest route in 3-dimensional space. This route is called a geodesic or great circle. While map projections distort these routes confusing passengers, the great circle path is the shortest path between two far locations. This is why pilots fly polar routes saving time and distance.
And this is why pilots often fly over Greenland. Meanwhile, the Egyptians, who started all this, still could not figure out the height of the pyramids even though they had Pythagoras. Not to mention that even today there is no certain way to measure the partial volume of a cylinder. What about the direction of the route? Nobody can convince me that Madrid lies to the north of Newyork as they are saying now. Maybe thats how they conclude it but its wrong, even if it works.
Because the time it takes to fly to the higher altitude is not commensurate to the time lost by not climbing. Therefore, as you go higher, the weight of the air column decreases reducing atmospheric pressure and density. However, the air also gets colder slightly increasing density.
In the Stratosphere, temperatures increase with altitude instead of decrease. However, this layer of the atmosphere is above the troposphere where we live, so it has to be less dense.
Thus, the weight of the hydrostatic pressure of the air column has a larger effect on atmospheric pressure and air density at least less than 10 km above sea level.
The article fails to understand that aeroplanes travel in the air, which is moving, rather than fixed in relation to the earth. The origin and destination are fixed to the earth, if the sea and the air were likewise fixed, a great circle would yield the shortest path.
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