Is the configuration of the plane flying to Lhasa the same as that of an ordinary plane?

Lhasa has a civil aviation airport, namely Gongga Airport. From the nature of use, Gongga Airport is a dual-use airport, with a standard grade of 4E, and has a runway and terminal with a length of 4000 meters. The local altitude reaches 3600 meters, which is a typical plateau airport among domestic civil aviation airports, but it is not a more difficult plateau airport.

From the perspective of civil aviation aircraft, flying to a plateau airport like Gongga in Lhasa has the following three main impacts on flight performance requirements:

1, takeoff and landing performance;

The biggest change of air parameters in plateau area is the sharp drop of air density, which leads to the decline of aircraft lift at the same speed. In this case, the length of the take-off and landing runway of civil aircraft with the same model and passenger capacity is much longer than that of plain airport. This is why the runway length of Lhasa Gongga Airport should be increased to 4000m, while the runway length of Hongqiao Airport (4E) at the same level is only 3400m.

On the contrary, for civil aircraft, it is necessary to make their own weight as light as possible, so that they can have better plateau acceleration and landing deceleration performance under the same engine thrust. Even if an accident occurs in the air, the distance and time of gliding flight will be longer. To carry out professional performance parameters, it needs ETOPS, that is, the longest time for an aircraft to fly safely under the condition of single engine failure, which is generally required to be 120 minutes instead of the common 60 minutes.

2. Stability of plateau mountain area when encountering airflow;

The airflow in the plateau mountainous area is more complicated, and the airspace around the airport will encounter all kinds of sudden strong winds and wind shear. In this case, on the one hand, the pilot's operational ability is tested, on the other hand, the stability of the aircraft is tested. Generally speaking, the length of aircraft fuselage is shorter, and the vertical and horizontal tail areas of aircraft are larger. Of course, if there is a flight control system, the software part needs to be readjusted.

3. Cabin pressure maintenance requirements;

When a civil aircraft flies normally in the air, the pressure in the cabin is generally maintained at a height of 2000-2400 meters, and the pressure is constantly adjusted during the landing process to keep it consistent with the ground pressure outside the cabin. However, after switching to the plateau area, it is necessary to adjust the cabin pressure mode. We can't copy the requirements during the plain area, but we should keep the air pressure in the cabin as high as possible to make passengers feel comfortable.

In fact, there is no high requirement for the realization of specific models. As long as the runway is long enough, ground navigation equipment can take off and land. However, for domestic flights to Lhasa, considering the comprehensive factors such as flight safety, performance, cost and route density, it is generally completed by smaller aircraft. In the 1970s and 1980s, four-engine aircraft like Boeing 707 were generally used to fly. In the 1990s, it was replaced by wide-body aircraft like A330 and low-density narrow-body passenger aircraft like Boeing 737-700, and Soviet-made aircraft like Tu-154 also flew in.

After 2000, Airbus carried out altitude adaptation transformation on the short fuselage model in its A320 series, and thus launched this A3 19 passenger plane, which was known as the "Little Prince of the Plateau", and was purchased in large quantities by domestic airlines such as Tibet Airlines and Sichuan Airlines, and specially flew to Xizang Autonomous Region.

Therefore, generally speaking, the requirements for civil airliners flying to Lhasa are "small, light and stable" models.

This is the end of the question-

Friends who are interested in aviation may wish to pay attention to Eagle Airlines.

The plane that usually flies to Tibet is A3 19 of Airbus Europe, which is suitable for flying to the plateau.

But consider the seasonal factors. From spring to the end of April, Gongga Airport may be closed due to the weather, and the punctuality rate of flights is not high, so flights entering Tibet may not be able to land and return. The alternate field of Gongga Airport is Chengdu Shuangliu.

When you get off the plane, you will feel the air is different. I call it the taste of Tibet. Just get off the plane, don't be alive and kicking, don't smoke, it is easy to cause a violent reaction. Don't drink when you first arrive in Lhasa, it's easy to bring a dog.

It is recommended to choose a seat near the left window for the flight to Tibet, with good scenery. Outside Tibet, it's the opposite.

On the left side of the Chengdu-Lhasa route is the Himalayas, and Nange Bawa can be seen at close range. On the right is Nyainqentanglha Mountain, and in the distance is Tanggula Mountain, both of which are very spectacular. When the weather is clear and the visibility is high, all three mountains are clearly visible. After taking off from Chengdu, you can see the Hengduan Mountains, including Siguniang Mountain. From Lhasa to Chengdu, if the weather in the basin is fine and there are few clouds, you can clearly see the cliff-like transition from the Qinghai-Tibet Plateau to the Chengdu Plain, which is also spectacular.

At present, most flights take the Lhasa Valley and land eastward in Qushui, which is not as good as the scenery directly below the Yarlung Zangbo River Grand Canyon. Lhasa and Potala Palace can't be seen from the air.

Military aviation has been suspended. Il 76, who used to be able to take a military plane, had no seat, but took an parachute seat, with luggage piled in the middle and mixed goods. Lhasa people affectionately call it "aerial tractor". I sat on it once, and it tasted sour and refreshing. Chengdu landed at Taiping Temple Airport.

The configuration of the plane flying to Lhasa is different from that of an ordinary plane. The difference lies in the following two aspects.

First, in ordinary aircraft, if the cabin pressure is released, the oxygen supply equipment of the aircraft will automatically fall off from the top of the head, and passengers will immediately wear oxygen masks to absorb oxygen. And how is his oxygen produced? He is the oxygen produced by chemical reaction. Once this oxygen supply is turned on, it cannot be stopped. Ordinary aircraft can provide about 12 minutes of oxygen. 12 minutes, on the normal route, the plane can descend to a safe altitude. At this height, passengers can feel it without oxygen, which can ensure the safety of passengers. On the other hand, the route to Lhasa has complex terrain and high altitude, usually above 65,438+00,000 feet. Ordinary chemical oxygen supply aircraft can no longer meet the relevant requirements. Therefore, aircraft flying to Lhasa usually need to modify the cabin oxygen supply system. At present, most planes flying to Lhasa use oxygen cylinders for oxygen supply. In the case of emergency decompression of the engine room, oxygen supply can usually be provided for at least one hour. Within an hour, the plane can descend to a safe altitude, fly to the alternate airport and land safely. Oxygen cylinder bracket is easy to operate and can be interrupted at any time. Can be used repeatedly. Before each takeoff, professional maintenance personnel should check whether the oxygen cylinder equipment is normal and the pressure is sufficient. To ensure the navigation needs.

Lhasa airport has high altitude and thin air. We know that the power of the engine is directly proportional to the air density. At the same engine speed, the thin air at high altitude will weaken the aerodynamic force. Therefore, in order to provide enough power, the engine power of aircraft flying to Lhasa is usually large.

The above two points are the main core differences.

Where is it? It's different. Planes flying to Lhasa usually have four wings and an engine that can rotate vertically ... It's too old, don't you believe me?

Just like an ordinary plane! There is no special configuration, and the highest Mount Everest is over 8000 meters. Isn't the current passenger plane flying tens of thousands of meters? Trains are different. This is an American-made locomotive, and every car has oxygen supply.

Let's put aside the professional point of view, because we went as ordinary passengers. The planes flying to Lhasa, like those in the mainland, are all ordinary civil airliners, among which Airbus has the most models, among which Airbus A3 19 has the most. The famous Sichuan Airlines are all Airbus models, and other planes flying to Lhasa are almost all Boeing 737 and Airbus, so they are the same as mainland planes, and there is no difference. As for the increase in oxygen in the warehouse,

As a passenger, I don't feel any different. I often fly from Lhasa to Xi 'an, Chongqing and Beijing for work reasons. What's the difference? From the passenger's point of view, we can feel two things: 1. The scenery of the journey is beautiful, mainly because the snowy mountains and blue sky are particularly beautiful after entering the Qinghai-Tibet Plateau. 2. The price, the tourist season (May -65438+ 10) is above 2000, and only the transit is cheaper, but it is not good to reach the destination, and it still needs a long wait.

The same, right?

It's definitely different, but it's not professionals who can't give you professional answers. But analyze it from several aspects: First, the oxygen-increasing equipment Lhasa belongs to the plateau, with low oxygen content, and all kinds of needs of passengers have to be met. 2. Engine or captain's flying skills. The plateau area is windy and bumpy, and the technology should be excellent. Once I flew from Ali Kunsha Airport to Lhasa Gongga, and the sudden landing of the plane scared a girl to cry. My palms are sweaty. . There is nothing to say about the scenery. .

/kloc-in 0/6, I went to Nepal twice and stopped at Gongga Airport in Lhasa. Because Lhasa is a plateau, the flights to Lhasa are generally 32 1 or 3 19 plateau planes.