Why do most planes fly at 30000 feet?

The reason aeroplanes fly so high is due to improved fuel efficiency. Flying above 30,000ft also has the benefit of allowing the aeroplane to fly above most weather systems making it more comfortable for the passengers.

Why is it more efficient to fly at high altitude?

Cool air expands more when heated than warm air. It is the expansion of the air that drives combustion engines. The second reason is the low density of the air. Low density causes low drag and therefore the aircraft flies much faster at high altitude than on low altitude when it is given the same thrust.

How fast do commercial airliners fly?

Most commercial aircraft typically fly at around 460-575 mph, or 740-930 km/h, according to Flight Deck Friend. But private jet speed can vary depending on a variety of factors, such as the weight onboard and the weather conditions.

Why do jet airliners fly at very high altitudes?

“Why do jet airliners fly at very high altitudes, in the 30,000s to low 40,000s?” The simplest way to understand this is to say that higher the altitude, the more efficient the flight. Turbine engines are more efficient at higher altitudes, where the air is thinner and less fuel is needed in the mixture.

How high do airplanes fly?

Airplanes fly at many different altitudes and not just 30k feet. They usually have them fly at x,000 to keep them separated by at least 1000 feet vertically from aircraft flying a different course.

Why do commerical aircraft fly so high?

Why Do Commerical Aircraft Fly So High? The reason aeroplanes fly so high is due to improved fuel efficiency. A jet engine operates more efficiently at higher altitude where the air is much thinner, allowing an aircraft to travel faster whilst at the same time, burning less fuel.

What is the optimal cruising altitude range of an airplane?

Each airplane has an optimal cruising altitude range that is the best tradeoff of speed and fuel efficiency. All things equal, if you took an airplane and flew at 30,000 feet and measured its speed, then took the exact same airplane and went to 40,000 feet and measured its speed, it would almost always be universally slower at 40,000 feet.