# Question: What is the temperature at 40000 feet altitude?

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Between 30,000 and 40,000 feet (9,000 and 12,000 m), the cruising altitude of most jet aircraft, air temperature ranges from -40° F to -70° F (-40° C to -57° C).

## Can planes fly at 40000 feet?

Modern airliners are usually built with the ability to function when flying over 40,000 feet. Despite these capabilities, pilots don’t usually hit these levels when there are passengers are on board. According to USA Today, a Boeing 767 has a service ceiling of 43,000 feet.

## What is the temperature at 45000 feet?

U.S. Standard Atmosphere Air Properties – Imperial (BG) Units

Geo-potential Altitude above Sea Level – h – (ft) Temperature – t – (oF) Acceleration of Gravity – g – (ft/s2)
30000 -47.83 32.082
35000 -65.61 32.066
40000 -69.70 32.051
45000 -69.70 32.036

## What is the outside temperature at 35000 feet?

At 35,000 feet the air temperature is about -54C.

## What is the temperature at 30000 feet altitude?

A: The standard temperature for 30,000 feet is -44.5C or -48F (Source: meteorologytraining.tpub.com/14269/css/14269_75.htm). All materials used in airplanes are designed and tested to withstand temperature extremes.

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## Why planes do not fly over Tibet?

According Debapriyo, most commercial airlines avoid flying directly over the Himalayas. 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.”

## 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. …

## Do pilots sleep while flying?

Do pilots sleep in flight? The simple answer is yes, pilots do and are allowed to sleep during flight but there are strict rules controlling this practice. Pilots would only normally sleep on long haul flights, although sleep on short haul flights is permitted to avoid the effects of fatigue.

## Can planes fly at 50000 feet?

It was set in an SR-71 Blackbird in 1976. The speed record is also held by an SR-71, at 2,193 mph. This is not as high or as fast as the airplane can fly, however, it’s absolute speed and altitude limits are classified. Most US military aircraft can exceed 50,000 feet, if they really really try.

## Can a plane fly at 60000 feet?

Some aircraft can fly higher

Concorde has been the only significant exception amongst commercial aircraft. It could fly up to 60,000 feet due to the increased lift generated when flying at much higher speeds. At low altitudes, drag would prevent it from reaching its high speeds.

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## Why do planes not freeze at altitude?

However, when an airplane comes in contact with it, the airplane acts as the freezing nuclei, freezing the droplets immediately. At an altitude of 35,000 feet, however, the clouds are made of ice crystals so no supercooled droplets exist thus, airplanes do not face icing issues.

## Can you breathe at 37000 feet?

The Atmosphere

This means that at cruising altitude of 37,000 feet, the outside air temperature could be minus 76°F. … As you climb into the Troposphere, the air pressure also decreases. This decrease in air pressure makes it increasingly difficult to breathe, reducing the oxygen saturation in your blood.

## Why do pilots prefer to fly at 36000 feet?

The biggest reason for this altitude lies with fuel efficiency. The thin air creates less drag on the aircraft, which means the plane can use less fuel in order to maintain speed. Less wind resistance, more power, less effort, so to speak.

## Do planes fly better in hot or cold?

But icing aside, cold air can help a plane take off and fly more efficiently. So why do planes perform better in cold weather? Simply, colder air is denser than warmer air, which contributes to engine performance and air lift.

## Why do planes 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.

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## Can a plane fly at 100000 feet?

These rocket-powered planes are used mostly to collect data and are the only planes that can fly this high. Today, there are no business or commercial airplanes that are able to fly at 100,000 feet. It just isn’t possible.