At what altitude do jet engines stop working?

Flying at a typical altitude of 36,000 feet (about seven miles), an aircraft that loses both engines will be able to travel for another 70 miles before reaching the ground.

How high can a jet engine operate?

Jet Engine Efficiency

Maximum operating altitudes for general aviation turbojet airplanes now reach 51,000 feet. The efficiency of the jet engine at high-altitudes is the primary reason for operating in the high-altitude environment.

How do jet engines work at high altitudes?

Jet engines work more efficiently at high altitude because the air is cooler. … Hence, the larger the expansion of the air when heated, the faster the aircraft moves because it is the expansion of air that drives the turbines of the jet engine which generates more power for lesser fuel burn.

How long do jet engines last?

The high performing engines typically are specified to last 3000+ hours and the long lasting engines are often specified to last 30000 hours and usually last longer. The 30000 hour number is 3 1/2 years of continuous 24/7 operation.

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What will replace jet engines?

Wait, Could Plasma Thrusters Really Replace Jet Engines?

  • A new plasma thruster could scale up to compete with traditional jet engines.
  • The plasma is magnified by high-intensity microwaves and pressurized air.
  • Researchers had to invent a way to measure the 1,000-degree-plus plasma instrument.

Can planes fly at 50000 feet?

Normally, passenger jets or airplanes, fly can fly at an altitude, maximum of 42000 feet. Currently, no passenger airplanes are “able” to fly at 50,000 feet or above. Because, at these altitudes, air density is very low, which wouldn’t sustain the heavy weight of the passenger aircrafts.

What is the highest altitude A fighter jet can fly?

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.

Do planes use more fuel at lower altitudes?

At lower altitude an aeroplane usually has more lift. However an aeroplane flying at low altitudes (with gear/flaps up) at low velocity burns the same amount of fuel it would flying much faster at a higher altitude.

Why are jet engines so inefficient?

The main contributors to the inefficiencies in our big-bore engines is higher friction due to more ring contact area, and the biggest … running rich of the stoichiometric air/fuel ratio to cool the engines and make sure one cylinder is not running lean.

How reliable is a jet engine?

The Federal Aviation Administration (FAA) was quoted as stating turbine engines have a failure rate of one per 375,000 flight hours, compared to of one every 3,200 flight hours for aircraft piston engines.

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Does heavy rain affect jet engines?

Although rain is capable of hindering the function of a jet engine, it is rarely a noticeable effect. The majority of storms do not create enough rain or snow to disturb the engines, and the ice crystals that clouds are made of are far too small to affect function.

How expensive is a jet engine?

And then there are so many different types of engines, which each have their own thrust rating. Roughly speaking, an engine can cost anything from 12 to 35 million dollars.

How much does a Rolls Royce jet engine cost?

Cost. In 2000 Qantas were quoted a price of US$12.85 million per Trent 900. In 2015 Emirates Airlines signed a contract for 200 Trent 900s including long-term service support at a cost of US$9.2 billion or US$46 million per engine.

Is an electric jet engine possible?

You can’t have an electric jet plane. A jet plane would have a turbine engine and the whole principle of the turbine engine include a combustion chamber which mean that jet fuel is used in order to create combustion. … An aircraft that uses this for propulsion is a jet-propelled airplane. A jet plane.

Can hydrogen power a jet engine?

Hydrogen can either be burned in a jet engine, or other kind of internal combustion engine, or can be used to power a fuel cell to generate electricity to power a propeller.

Are plasma jet engines possible?

Now researchers have created a prototype thruster capable of generating plasma jets with propulsive forces comparable to those from conventional jet engines, using only air and electricity. … If air plasma jets ever become practical, they could reduce fossil fuel use and greenhouse gas emissions, the researchers say.

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