# Question: What Is The Highest Flight Altitude?

## Can you breathe at 20000 feet?

It is the lack of oxygen rather than the reduced air pressure that actually limits the height at which we can breathe.

An elevation of about 20,000 feet above sea level is the maximum height at which sufficient oxygen exists in the air to sustain us..

## Why do commercial airliners fly at 35000 feet?

The “sweet spot” of flying is regarded as between 35,000 and 42,000 feet – too high and the oxygen becomes too sparse to fuel the engines, too low and the air resistance is greater. This optimum height is linked to the usual weight of a commercial jet – that is, heavier planes fly lower, and lighter higher.

## Why do planes have a maximum altitude?

The high altitude is because the air is thinner, meaning planes can travel easier and quicker, saving money. Planes flying higher also means avoiding air traffic as well as bad weather conditions. In the case of an emergency, it also gives more time to fix the problem when thousands of feet in the air.

## Can planes fly at 50000 feet?

Answer: Every airplane has a certified maximum altitude. … A: Yes, very high altitude, above 50,000 feet, where there is very little air, has little or no turbulence.

## Can you breathe 10000 feet?

At 10,000 feet above sea level, the normal saturation for a human breathing regular air is 87 percent. Go to 18,000 feet without supplemental oxygen and the saturation drops to 80 percent (thanks to the partial pressure of oxygen being just 21 percent of the atmospheric pressure at any altitude).

## What is the highest altitude possible?

There has been no lack of attempts to reach the highest altitudes. Up to the present, mankind has been able to reach an altitude of 11,800 meters in an airplane, 12,000 meters in a free balloon, and 8,600 meters on Mount Everest (Figure 9).

## How high can a plane flight?

Commercial aircraft typically fly between 31,000 and 38,000 feet — about 5.9 to 7.2 miles — high and usually reach their cruising altitudes in the first 10 minutes of a flight, according to Beckman. Planes can fly much higher than this altitude, but that can present safety issues.

## Why do planes not fly over the Pacific?

The primary reason airplanes don’t fly over the Pacific Ocean is because curved routes are shorter than straight routes. Flat maps are somewhat confusing because the Earth itself isn’t flat. Rather, it’s spherical. As a result, straight routes don’t offer the shortest distance between two locations.

## How cold is it at 35000 feet?

How cold is it up there? The higher you get, the colder it gets, up until 40,000 feet. If the temperature at ground level was 20C, at 40,000 feet it would be -57C. At 35,000 feet the air temperature is about -54C.

## Do planes fly over storms?

Jet aircraft can safely fly over thunderstorms only if their flight altitude is well above the turbulent cloud tops. The most intense and turbulent storms are often the tallest storms, so enroute flights always seek to go around them.

## Why do planes fly over water instead of land?

At lower levels, being over sea would typically offer less turbulence, in part because as the ground warms you can encounter rising air thermals. Generally, airliners fly whatever route provides the shortest time, which is not always the shortest distance, often called the Great Circle route.

## What is the highest altitude a 747 can fly?

That is why a 747 can be certified to 45,000 feet (grand fathered) while a 787 and an A350 are fighting to get above 41,000 feet. NOTE: FAA sets a maximum certification altitude of 51,000 feet.

## How far can a pilot see at 35000 feet?

If you look up into space you are looking through about 62 miles of atmosphere, at 35,000 feet you will be looking through almost 230 miles of atmosphere to see the horizon.

## Can a plane fly higher than Mount Everest?

Airplanes often avoid air paths that take them over Mt Everest or the Pacific Ocean. … This is because “the Himalayas have mountains higher than 20,000 feet, including Mt Everest standing at 29,035 feet. However, most commercial airplanes can fly at 30,000 feet.”

## At what speed do planes take off?

Typical takeoff air speeds for jetliners are in the range of 240–285 km/h (130–154 kn; 149–177 mph). Light aircraft, such as a Cessna 150, take off at around 100 km/h (54 kn; 62 mph).

## Do planes eject toilet waste?

Blue ice, in the context of aviation, is frozen sewage material that has leaked mid-flight from commercial aircraft lavatory waste systems. Airlines are not allowed to dump their waste tanks in mid-flight, and pilots have no mechanism by which to do so; however, leaks sometimes do occur. …

## Can a plane fly with one wing?

No, an airplane cannot fly with only one wing. In order for a plane to stay stable in air, it has to maintain balance.

## Can a plane fly at 60000 feet?

Answer: The highest commercial airliner altitude was 60,000 feet by Concorde. The highest military air-breathing engine airplane was the SR-71 — about 90,000 feet. The highest airliner flying today reaches 45,000 feet. The highest business jet flying today reaches 51,000 feet.

## What happens if a plane fly too high?

When the plane gets too high, there is insufficient oxygen to fuel the engines. “The air is less dense at altitude, so the engine can suck in less and less air per second as it goes higher and at some point the engine can no longer develop sufficient power to climb.” …

## At what altitude can a human not breathe?

8,000 mIt refers to altitudes above a certain point where the amount of oxygen is insufficient to sustain human life for an extended time span. This point is generally tagged as 8,000 m (26,000 ft, less than 356 millibars of atmospheric pressure).

## Why is it colder at high altitude?

The basic answer is that the farther away you get from the earth, the thinner the atmosphere gets. The total heat content of a system is directly related to the amount of matter present, so it is cooler at higher elevations.