Can a thunderstorm plane take off? Will thunderstorm weather affect flight?

Thunderstorm planes can't take off, and thunderstorm weather conditions will affect the normal operation of flights.

In terms of flight safety, it usually rains and can fly without affecting normal visibility, except for thunderstorm weather. Aircraft flying in thunderstorm weather will have strong bumps, which will easily damage the aircraft structure, and strong lightning will also damage the aircraft.

Within the prescribed flight route, if there is bad weather such as thunderstorm, the flight will not pass. Thunderstorm is a disastrous weather phenomenon caused by extremely unstable air, which often carries strong winds, heavy rains, lightning strikes and even hail, so it can often cause disasters and greatly endanger the safety of civil aviation transportation.

Extended data

First, the reason why aircraft are prohibited from flying in thunderstorm weather:

Thunderstorms will threaten the safe operation of aircraft, mainly in:

1, heavy precipitation

When an airplane flies under, near or in a thunderstorm cloud, it may enter a heavy precipitation area. Heavy precipitation will cause the engine to inhale too much water and affect the engine. In the low-altitude landing stage, heavy precipitation will reduce the aircraft performance and affect the pilot's observation and judgment. In addition, the runway surface is slippery due to precipitation, and there have been accidents such as pilots' unclear vision, planes rushing off the runway and even plane crashes.

2. Lightning

Thunderstorm clouds contain huge energy, and they will show their terrible side in the form of electric discharge. Green, yellow, red and other colors often appear on radar pictures, and the intensity of precipitation (liquid) is expressed by radar reflection. In most cases, the intensity of reflected echo also represents the possibility of discharge at this position. If the plane is struck by lightning, it may cause damage to the body, failure of some navigation equipment or damage to system equipment.

3. Hail

Hail usually appears in or downwind of thunderstorm clouds. Hail is very harmful to fast-flying aircraft, which can lead to windshield rupture or radome damage in severe cases. If the engine or operating system is damaged by hail, the consequences are unimaginable.

4. Strong wind (wind shear)

Thunderstorm clouds are often accompanied by strong winds, and the wind direction and wind speed may change dramatically, resulting in strong turbulence of the aircraft. For example, in the low-altitude landing stage, there are not a few flight accidents caused by the sharp reduction of aircraft lift caused by the downburst and wind shear under the thunderstorm cloud.

5. Ice accumulation

Thunderstorm clouds are generally "tall", and supercooled water droplets often exist at some heights in the clouds. The cloud anvil blown by the wind at the top of the cloud is relatively large, and the air temperature is very low. Once the aircraft flies in these areas, it may encounter strong ice accumulation in a short time, which will lead to the attenuation of the flight performance of the aircraft.

6. Collision

Thunderstorm clouds are accompanied by unstable air convection, especially airflow movement. The outside air is also very unstable, which will cause moderate to severe bumps in the plane. Flying in bumpy conditions for a long time will make the crew feel unwell and reduce their working ability. If the seat belt is not fastened properly, it may also cause injury to the crew or passengers.

7. Low visibility

Civil aviation has strict visibility standards for aircraft taking off and landing. Generally, when the visibility is lower than 1000m, the take-off and landing of flights will be affected.

8. The psychological impact of thunderstorm weather on pilots and ground personnel, the fatigue that may be caused by increased workload, and so on.

Second, no-fly weather.

1, thunderstorm

Thunderstorm is composed of strong convective cumulonimbus clouds, often accompanied by thunder, thunder, showers, strong winds, and sometimes there are small and medium-sized convective weather systems such as hail and tornado.

Strong turbulence in thunderstorm clouds will cause aircraft to bump; In the development stage, a large number of supercooled water droplets in thunderstorm clouds will cause aircraft to accumulate ice; There are often a lot of hail in the mature thunderstorm clouds, which is easy to make the plane suffer from hail. Lightning approaching the plane will charge the plane. When there is lightning between clouds or between clouds, the plane will be struck by lightning, or the lightning will directly hit the fuselage, which will lead to the disorder of the electric field of the plane and the interference or interruption of instruments and communication equipment. If lightning strikes the fuel tank, it will also cause the plane to explode.

2. Turbulence

The jet stream is a strong and narrow high-altitude strong wind belt. When flying along the rapids, it can save fuel, shorten the flight time and increase the range; It's the opposite when you fly against the current. However, the jet stream is often accompanied by strong wind shear, which will make the plane violently bumpy. When crossing the rapids, there will be a great bias current, which has a great influence on maintaining the course.

3. Ice accumulation

Aircraft icing refers to the phenomenon that supercooled water droplets or cloud droplets attach to the aircraft fuselage to freeze or water vapor condenses into ice when the aircraft flies over the cloud area. Aircraft icing will change the weight of the aircraft, thus changing the center of gravity of the aircraft, generating pitching moment and affecting the dynamic characteristics of the aircraft. In addition, the inclusion of crushed ice in the engine will also cause serious damage to the engine.

4. Low-level wind shear

Wind shear refers to the sudden change of wind direction, and low-altitude wind shear has a great influence on the take-off and landing of aircraft. Downwind shear refers to the situation that (strong) headwind suddenly becomes weak headwind, calm wind or downwind. In this case, the airspeed and acceleration of the plane decrease, and the plane can't keep its balance and fall. Counterwind shear refers to the situation that (strong) downwind suddenly becomes weak downwind, static wind or headwind. In this case, the plane will leave the channel with the increase of airspeed and acceleration.

Crosswind shear refers to the situation that the wind on the left (right) side of the original aircraft suddenly becomes the wind on the other side. In this case, the plane will slide sideways and the fuselage will lean to one side. If the low-altitude wind shear height is high, the pilot should immediately take corrective measures to restore the aircraft to a balanced state. If the low-altitude wind shear height is low, the pilot has no time to complete the correction action, which is easy to cause flight accidents.

5. Downburst

Downburst is one of the low-altitude windshear which has the greatest influence on the landing safety of aircraft. This downward airflow will cause a strong divergent wind when it reaches the ground. If the plane is in the landing stage, when crossing the downburst, it will first encounter a strong headwind, and the airspeed and acceleration of the plane will increase.

When the plane flies to the center of downburst, the headwind disappears, and the plane is impacted by strong downdraft and descends rapidly. After the plane flew over the central area, it entered the strong downwind area. At this time, the airspeed and acceleration of the aircraft decreased, and the altitude continued to decrease. If the pilot does not have good operation skills at this time, the plane will easily deviate from the scheduled channel and dive, and then stall, causing serious flight accidents.

Phoenix net-on the influence of thunderstorm weather on civil aviation flights

Baidu encyclopedia-no flight weather