When the helicopter was flying in Slovakia, it was pouring rain outside the cabin.
The heavy rain was accompanied by flashes of lightning and loud thunder from time to time.
In a dark environment, the dividing line between the mountains and the sky is not obvious. The sky is even darker than the mountains.
"The current weather is very exaggerated. The current precipitation has reached 50 millimeters per hour." Wenjie checked the weather conditions online.
Heavy rain washed away the plants on the ground. Lightning bolts cut through the darkness and illuminated the valley.
The helicopter flying in such heavy rain is like a swaying leaf.
Every time a strong wind blows or lightning flashes or thunder sounds, the helicopter will experience some turbulence. But there is no need to panic because these military helicopters have good crash resistance. There is no problem in fighting such a storm.
The helicopter itself also adopts a lightning protection design, so it will not be struck by lightning.
Discharge brushes are installed on the top of the helicopter's tail and the wing tips of the rotors. They can quickly release the charge generated by the friction between the aircraft fuselage and the air. Even if the aircraft is really unfortunately hit by lightning, the discharge brushes on the helicopter will also Can quickly release lightning.
Moreover, the flying height of the helicopter is very low. It is also a covert flight. The flying height is lower than the surrounding mountain tops. If it were not for bad weather conditions and night flying environment, the flying height of the helicopter would be close to the ground.
But flying like this is not safe. After all, flying at ultra-low altitude when visibility is poor is very risky. And it is not a good idea to always fly in thunderstorm areas. There is an old saying in China: "Always fly by the river." "How can you walk without getting your shoes wet?" There is an old saying in China that goes "If you walk at night for a long time, you will bump into a ghost."
Therefore, there is no guarantee that you will not be hit by lightning if you have been flying in a thunder and lightning area. Although this kind of thing is a small probability event, it is the same as the crash is a small probability event. If nothing happens, forget it. If something happens, then it will be. Big event. Absolute destruction of machines and human lives.
Of course, the issue of discharge brushes was also mentioned before. But you have to know that in this environment, nothing can be said clearly, even if it is something that is technically guaranteed.
The discharge brush can ensure that the people in the aircraft will not be electrocuted. However, being struck by lightning will definitely cause violent turbulence. When the flight altitude is not high and the safety area on both wings is narrow, the violent turbulence may cause the pilot to Misoperation. If you are not careful, you may hit the mountain.
The so-called ultra-low-altitude flight refers to a flight whose altitude is less than 100m above the ground.
In the current interpretation of the military warfare field, according to the flight altitude, it is divided into ultra-low-altitude flight (less than 100m above the ground. It can be used for search and rescue, assault and escape from enemy areas, etc.), low-altitude flight (height between 100--1000m .Can be used for training, parachute, airdrop, reconnaissance, assault, etc.), medium-altitude flight (height at 1000.7000m. Can be used for training, patrol, bombing), high-altitude flight (height at 7000.15000m. can be used for training, reconnaissance, bombing, Interception, patrol), ultra-high altitude flight (height greater than 15,000m. Can be used for reconnaissance, interception, etc.).
By the way, flight is divided into five situations according to flight speed: low-speed flight (M0.3), subsonic flight (M=0.3~0.8), transonic flight (M=0.8~1.4), and supersonic flight (M=1.4 ~5.0), hypersonic flight (M5.0).
"Can you avoid the thunder and lightning area?" Wang Chaoyang asked loudly to Gao Fei and "Hound" who were flying the helicopter.
Modern helicopters are equipped with weather radar, which can check the weather conditions within a certain range. At this time, the radar display is showing the surrounding weather conditions.
"There is no way. From here to the mission area we are going to. It is raining everywhere. There is no way for us to avoid it." "Hound" said.
"Actually, we can increase the flight altitude. Such heavy rain will make the helicopter well hidden." Gao Fei said. "Then let's climb." Wang Chaoyang said.
"Calm down. Calm down." Sha Junlong said.
"How can you keep me calm?" Wang Chaoyang said.
"Actually, I don't think such wind and rain will cause big problems." Sha Junlong said.
"Why." Wang Chaoyang said.
"Because we are about to arrive at the mission location." Sha Junlong said.
"We still have half an hour to fly." Gao Fei said.
At the same time, the helicopter's altitude began to climb.,
After climbing a little higher, the helicopter can fly relatively safely.
"In such an electromagnetic environment, our navigation is likely to have problems. We must check." Sha Junlong said.
"I calculated our flight time before departure. We can't fly for that long," Sha Junlong said.
What Sha Junlong said makes sense.
You know, thunder and lightning is a majestic and somewhat terrifying electrical discharge phenomenon accompanied by lightning and thunder.
The conditions for generating thunder and lightning are accumulation and polarity in thunderclouds. Therefore, they are often accompanied by strong gusts of wind and heavy rain. Sometimes they are also accompanied by hail and tornadoes.
The top of cumulonimbus clouds is generally higher, up to 20 kilometers away. There are often ice crystals in the upper parts of the clouds.
Processes such as the attachment of ice crystals, the breakup of water droplets, and air convection generate charges in clouds.
The distribution of charges in clouds is more complex. But generally speaking, the upper part of the cloud is dominated by positive charges, and the lower part is dominated by negative charges.
Therefore, a potential difference is formed between the upper and lower parts of the cloud. When the potential difference reaches a certain level, a discharge will occur. This is our common lightning phenomenon.
The average current of lightning is 30,000 amps. The maximum current can reach 300,000 amps.
The voltage of lightning is very high, about 100 million to 1 billion volts. The power of a moderate thunderstorm can reach 10 million watts, which is equivalent to the output power of a small nuclear power plant.
During the discharge process, due to the sudden increase in temperature in the lightning channel, the volume of air expands rapidly, resulting in a shock wave and strong thunder.
When charged thunderclouds approach protrusions on the ground, a violent discharge occurs between them. A strong flash of light and the roar of an explosion will appear at the location of the lightning discharge. This is the lightning and thunder that people see and hear.
There are four types of lightning: direct lightning, electromagnetic pulse, spherical lightning, and cloud flash. Both direct lightning and spherical lightning can cause harm to people and buildings. Electromagnetic pulse mainly affects electronic equipment. It is mainly caused by induction; cloud flash is due to Occurs between two clouds or on both sides of a cloud. So it is least harmful to humans.
Direct lightning is to accumulate a lot of charges on the cloud body. A large amount of charges have to find a channel to discharge. Sometimes it is a building. Sometimes it is an iron tower. Sometimes it is a person in an open place. So these people or Objects become a channel for charge discharge, which can injure people or buildings. Direct strike lightning is the most powerful form of lightning, while spherical lightning is less powerful than direct strike lightning.
As mentioned before, electromagnetic pulses mainly affect electronic equipment. Electromagnetic pulses can form thousands of volts of transient voltage on the printed circuit board of unprotected electronic equipment in an instant, causing irreversible damage to electronic equipment in an instant. destroy.
Of course, this refers to high-power electromagnetic pulse. For this kind of pulsed microwave beam with a peak power of more than gigawatts and a frequency of 1 GHz to 300 GHz due to nuclear explosions and non-nuclear electromagnetic pulse bombs (EMP). That is to say, the electromagnetic pulse energy generated by lightning is much smaller. At most, it will affect the accuracy of electronic equipment.
"How can you be sure that we must have been affected?" Gao Fei said.
"This is good proof." Sha Junlong said and took out a compass.
Under normal circumstances, the compass needle will gradually stabilize and point in one direction after constant swings.
But now, the compass in Sha Junlong's hand is constantly swinging. It has no intention of stopping at all. This is a typical effect of magnetic field interference.
"Wait a minute." Gao Fei frowned immediately. "Check the navigation system immediately. Start the backup navigation system."
Compared with the electronic navigation system as the main system, the mechanical navigation system as the backup has stronger anti-interference ability.
The results of the backup system came out immediately. Indeed, the special forces had already deviated.
"Fuck." "Hound" immediately adjusted its course.
At the same time, the special forces activated the Beidou positioning system and began manual navigation.
Although there was a thunderstorm, the satellite signal did not suffer much interference. Therefore, the special forces quickly obtained the current coordinates and determined that they would arrive at the scheduled landing location in five minutes.
"Prepare the rubber boat." Wang Chaoyang said to the people in the cabin.
Liu Ronglu and Chen Guoqing immediately began to prepare. They found a rubber boat among the supplies piled aside and immediately began to inflate it.
Wang Chaoyang, Sha Junlong, Long Yuanquan, and Luo Xuan immediately started to put on their diving suits.
At the same time, the four people began to pack some necessary equipment into a waterproof backpack. They waited to prevent the equipment from getting wet.
At the same time, the "Red Boy Club" also sent a small team to the basement of a tavern outside the port agreed with the "Evil Spirit" to wait for the arrival of the special forces.
The previous cooperation experience made both parties feel at ease with each other. So there was no grudge.
At the same time, in order to cooperate with the operations of the special forces, at the insistence of the "Red Boy Club", the resistance army began to launch some small-scale breakout operations as feint attacks to disrupt and paralyze the surrounding enemy forces to cover the infiltration operations of the special forces. .
As for NATO, a large number of transport aircraft are parked neatly on the tarmac of the Hamburg Air Base in Germany, waiting for the attack to begin.
The 101st Airborne Division was on the tarmac of the airport, carrying parachute packs and getting ready to go. A large number of tanks, armored vehicles, light artillery, and light trucks were ready to go.
The 101st Airborne Division will directly occupy the airport located on the outside of the encirclement in the first step of the air attack to provide an area for heavy troops to land and assemble.
The light armored equipment capable of airdrop will parachute directly into the encirclement with the paratroopers of the two regiments, and establish a solid defensive position to resist the attack of the encircling troops.
After the troops in the direction of the airport are assembled, they will attack together with a regiment of troops in the encirclement. They will try to open up the connection between the airport and the inside of the encirclement within three hours. At that time, the US 82nd Airborne Division and the British 6th The airborne division will implement air landing at the airport and quickly achieve the campaign objectives.