Why do commercial airlines not fly higher?

Because the higher you go, the thinner the air, going too high can make it tough to keep the plane in the air. Why? There will not be enough lift to do so. Above 25,000 feet or so, air pressure begins to drop.



Commercial airlines typically cruise between 30,000 and 42,000 feet because this altitude represents the "sweet spot" for fuel efficiency and safety. At these heights, the air is thinner, which reduces aerodynamic drag on the aircraft, allowing it to fly faster while consuming less fuel. However, they cannot go significantly higher because jet engines require a specific amount of oxygen to maintain combustion; as the air thins further, the engines risk "flameout." Additionally, there is a phenomenon known as "coffin corner," where the difference between an aircraft's stall speed and its maximum speed (Mach limit) becomes dangerously narrow. If a plane flies too high, it might not be able to stay fast enough to generate lift without exceeding its structural speed limits. Furthermore, flying higher would require much heavier, reinforced fuselages to handle the greater pressure differential between the cabin and the outside atmosphere, and the cosmic radiation exposure for passengers and crew would increase to unsafe levels over time.

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Much thinner air means that the engines cannot produce enough trust, and the wings would not produce sufficient lift. There could also be problems restarting a failed engine at a higher altitude in the event of a failure, as well as other safety implications of flying at higher altitudes for passengers and crew.

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For starters, the engine may suffocate from a lack of oxygen. Engines work by mixing air with fuel to create combustion. The higher an airplane flies, the less air the engines will receive. Second, the airplane's wings may fail to produce a sufficient amount of lift to maintain its current and excessive altitude.

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A: No commercial or business airplane flying today can exceed 100,000 feet. Special rocket-powered airplanes can fly over 100,000 feet to gather data, but they are specially designed for it.

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Air itself is constantly in motion; it will often rise toward the sky. But, any air that rises will expand and cool, as it encounters progressively lower atmospheric pressure (explained further in the next section). The upshot is that the air outside a plane will be much colder than at ground level.

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Whether flying at night or during the day, pilots need to see some kind of horizon. They use this to determine the airplane's attitude. At night pilots will turn their gaze from outside to inside and use the artificial horizon. The artificial horizon is normally a simply globe split into two hemispheres.

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The higher you fly, the more efficient it is The reason planes cruise at high altitudes is that they burn less fuel and can fly faster, as the air is less dense. At 30,000 feet and higher, it is also possible for aircraft to avoid weather systems, making it more comfortable onboard.

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At 40,000 feet its only 2.72 PSI. If outside air gets into the mask and is breathed, it contains one-fifth (20 percent) of the oxygen necessary for survival at 40,000 feet. The time of useful consciousness on ambient air only at 40,000 feet is 15 to 20 seconds.

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Aerodynamic altitude: If a commercial airliner flies too high, it will encounter less dense air passing over the wings to create lift. This can cause the plane to stall and fall out of control. Depending on the weather conditions and aircraft weight, this can occur anywhere between 40,000 and 45,000 feet.

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Planes have lower oxygen levels If this didn't happen, everyone inside the plane would die, as the low air pressure at the elevations planes fly (typically 35,000 feet or so) means there isn't enough oxygen present for your body to function.

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Airlines these days cruise at around 35,000 feet, some higher and some lower, but without protection at these altitudes a human being cannot survive.

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white was the first pilot to fly any aircraft faster than mach 4, 5 and 6, as well as the first to fly above 200,000 and 300,000 feet. he set the only official world record of the X-15 program when he flew to 314,750 feet on July 17, 1962, a f?d?ration a?ronautique internationale altitude record that still stands.

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Can you fly at 80000 feet? The US Air Force U-2 reconnaissance aircraft flies at 72 000 feet almost every day for many hours. The world's fastest manned aircraft, the SR-71, flew for many years at 80 000 feet and higher.

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The North American X-15 may be the fastest plane in the world, with speeds at 4,520 mph and Mach 5.93. It's an experimental aircraft used and powered by NASA and USAF.

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