What powers a plane to fly?

Jet engines move the airplane forward with a great force that is produced by a tremendous thrust and causes the plane to fly very fast. All jet engines, which are also called gas turbines, work on the same principle. The engine sucks air in at the front with a fan. A compressor raises the pressure of the air.



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The biggest reason for flying at higher altitudes lies in 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.

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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.

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Can a plane fly if all its engines have failed? A passenger aircraft will glide perfectly well even if all its engines have failed, it won't simply fall out the sky. Infact it can fly for around 60 miles if it loses its engines at a typical cruise altitude of 36,000ft.

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The higher a plane flies, the faster it can fly—to a point. “Less-dense air at higher altitudes means the actual speed the aircraft is traveling over the ground is much faster than the aircraft speed indicator shows the pilots in the cockpit,” says Kyrazis.

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The MLW is set in order to ensure safe landings; if an aircraft weighs too heavy during touchdown, it may suffer structural damage or even break apart upon landing.

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The operations department of the airline take the passenger, baggage and cargo information and collate this with the basic empty weight of the aircraft and the fuel load as determined by the pilots. They then feed this into a computer to calculate not only the gross weight of the aircraft but also the CoG at takeoff.

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An aircraft taking off with the wind. When taking off with a headwind it slows down the plane in its acceleration respect to the ground, but increases the flow of air over the wings, allowing to take off in a shorter distance and climbing in a greater angle in order to clear any obstacle.

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Among other things, this means descending to a lower altitude and, potentially, reducing the airplane's speed. If all of an airplane's engines fail simultaneously, the pilot will perform an emergency landing.

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