Private jets can fly higher than 15,500 m, while most commercial passenger planes operate at altitudes of 9,000 - 12,000 m.
Bombardier Challenger 3500 private jet. Photo: Bombardier
There are many reasons why private jets, in addition to their luxury and comfort, often fly higher than commercial passenger planes.
Safety standards
Safety is a primary concern with any aircraft, but private jets have more flexibility in terms of regulations and systems. In the event of a loss of cabin pressure, commercial aircraft must quickly descend to a safe altitude (below 10,000 feet) with sufficient oxygen for passengers. This requires special features and safety equipment such as oxygen masks and emergency slides. However, private jets can descend more quickly, and have varying levels of cabin pressurization and an oxygen supply. The risk of a private jet suffering a fuselage failure due to engine failure is also lower because the engines are located at the rear of the plane, away from the pressurized cabin.
Private jets are faster and more efficient
Flying at higher altitudes has performance and fuel benefits. The air is thinner and cooler at high altitudes, which increases the efficiency of jet engines and reduces fuel consumption. However, there is a trade-off with the amount of fuel used to reach that altitude. This is more of an issue with heavier commercial aircraft. Private jets also have engines with lower flow rates, meaning they use more air from the engine core than from the surrounding fan blades. This helps optimize their performance at high altitudes.
Size
Private jets are designed for agility and efficiency, with a higher power-to-weight ratio than commercial aircraft. This means they can climb faster and maintain higher speeds at higher altitudes, where the air is thinner and there is less drag. Commercial jets are heavier and bulkier, carrying more passengers and cargo. They also need massive wings to support their heavy fuselages at high altitudes.
Smooth flight experience
Weather and turbulence can affect the comfort and safety of flying. At 35,000 feet (10,500 m), commercial aircraft are above most weather conditions, but they can still encounter turbulence from wind shear or jet streams. This can be uncomfortable for passengers and crew, and can put structural stress on the aircraft. Private aircraft can avoid these problems by flying higher, where it is calmer and clearer. They also have more options to change their flight path or altitude if they encounter bad weather or turbulence.
Low traffic
Traffic is another factor that influences altitude choice. Commercial aircraft must follow predetermined routes and altitudes, which are often very crowded. This can lead to delays, diversions, and increased fuel consumption and emissions. Private aircraft have more freedom to choose their routes and altitudes, and often fly more direct and less crowded routes. This saves time, costs, and reduces environmental impact.
Thu Thao (According to Interesting Engineering )
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