"Mr. Song, you are progressing very quickly!"
Looking at the fighter plane in front of him that was basically 80% complete, Zhang Xingyang said with some surprise.
"It's mainly due to the design draft you gave us before, which gave us a lot of inspiration."
Song Tianxing smiled and said.
More than a year ago, Zhang Xingyang gave Song Tianxing some drafts of the appearance design of the fourth-generation aircraft.
These drafts include a variety of different fourth-generation aircraft appearance designs in later generations, from the F-22, which has completed test flights, to the J-20, which was supposed to appear ten years later.
There are even some sketches of an integrated air and space fighter that was not supposed to appear until fifty years later.
However, that fighter jet that can shuttle back and forth inside and outside the atmosphere is no longer an aircraft in the strict sense today, and should be classified as a manned spacecraft.
In fact, according to the current level of technology, even if Zhang Xingyang gave them all the drawings, they would not be able to build it.
Neither the material level nor the processing level can be achieved.
"You finally chose the canard layout."
Looking at this fighter model, which is not much different from the J-20 of later generations, Zhang Xingyang said with some emotion.
The choice of fighter aircraft structure largely depends on the current domestic technical reserves.
Because in the process of designing and manufacturing the J-10, a lot of design experience was learned.
Song Tianxing and others also took this aspect into consideration when designing the domestic fourth-generation aircraft.
Although at this time, mainstream theories believed that adding a canard design would sacrifice the stealth performance of the fighter aircraft.
Because it will affect the radar reflection area at the front of the fighter jet.
Among the technical indicators of the fourth-generation aircraft, stealth performance is a very important one.
This is also the reason why everyone is generally not optimistic about the canard design.
"We have discovered many interesting phenomena from the previous J-10S."
As the fighter jet that is currently closest to the fourth-generation aircraft in China, the J-10S also adopts many unique designs in terms of stealth performance.
This includes the unique nose and front half side strip design.
"After adopting such a design, it can not only greatly reduce the radar reflection area, but also increase high-altitude and high-speed performance."
"Although the Yingjiang people said that 'canard wings are best installed on enemy aircraft,' many people think that there are certain problems with canard wings."
"But judging from the situation of our other verification aircraft, there is no such problem."
"Under the same conditions, there is not much difference in the stealth performance between the two."
Song Tianxing and his team actually didn't just make such a fighter model.
In order to be able to determine the differences and advantages and disadvantages between different layouts, they built models of three very different fighters.
And through testing, such a canard layout design plan was finally determined.
After conducting several tests, they found that when the canards and the main wings are on the same plane, it is beneficial to stealth processing.
This is mainly determined by the characteristics of the radar. If contemporary fighter jets want to achieve stealth, the most important thing is to rely on appearance design.
Only by making the radar reflecting surfaces of the aircraft in all directions not at a perpendicular angle to the incoming radar waves, can the radar waves not be reflected in the original direction, but concentrated at a few limited angles.
In this way, in the radar display, the reflection cross section of the aircraft will be much smaller.
This is also an important reason why there are so many ridges and jagged edges on the fourth-generation fuselage.
These special designs allow fighter jets to effectively reduce their own reflection cross-section by reflecting radar waves to low-threat secondary directions when facing radar.
"Mr. Song, you have put in a lot of effort to be able to reach this level."
Zhang Xingyang can imagine how much time and effort they spent in more than a year before finalizing the aircraft's appearance design.
However, in Zhang Xingyang's view, today's stealth fighters have reached their limits.
After all, no matter how small the radar reflection cross section is, it can only deceive ground radars and airborne early warning aircraft.
However, judging from Zhang Xingyang's later experience, in the wars after the 1950s, these radar stealth fighters were almost invisible to high-resolution reconnaissance satellites in space.
Because as heavy air superiority fighters, they are all over ten meters in size.
In the eyes of the high-speed development of high-definition satellites, their every step was clearly seen.
Especially in local conflicts, due to the restrictions of space treaties, satellites in space cannot be attacked.
This also resulted in that both sides in the war basically lost the fog of war in the past and could see the movements of both sides in real time.
This also places extremely high requirements on the military's attack speed. If it is slightly slower, it may lead to an attack by hypersonic missiles.
"How is the ground static test going now?"
Zhang Xingyang didn't worry too much about stealth performance, because no one has such a complete space reconnaissance system yet.
By the way, the most advanced space reconnaissance satellite system in the world after the 1950s was in the Dragon Kingdom, named Haotian Mirror.
"The new fighter aircraft in front of us has a very good static balance and can maintain a good balance of center of gravity."
Song Tianxing was also very excited when he talked about this:
“That’s mostly because of the canards, too.”
Zhang Xingyang naturally understood what he meant. One of the important functions of canards on an airplane is to maintain stability.
In particular, the problem of sudden stability drop during transonic speeds can be effectively improved after using canards.
And because the canards designed today are all variable canards, the angle of the canard can be adjusted when needed to obtain the desired lift or drag.
It is used to obtain lift faster when taking off, so as to shorten the original take-off distance required by the aircraft and allow the aircraft to perform short take-off and landing.
In this war time, it is very advantageous.
In today's wars, airports are the first wave of attack targets, especially airports storing military aircraft, which are the main targets of enemy attacks.
Often after receiving the take-off order, the fighter jet must complete the take-off within a very short time, otherwise it may be destroyed by the enemy on the runway and hangar.
Short take-off and landing not only allows fighter jets to take off faster, but more importantly, it can shorten the interval between fighter jets taking off, allowing more fighter jets to take off in a short time.
"The most important thing for us now is to complete the wind tunnel blowing work for the fighter jet."
Speaking of wind tunnels, Song Tianxing looked at Zhang Xingyang. Apparently he also knew that Zhang Xingyang was now in charge of several hypersonic wind tunnels.
In this regard, we still have to ask Zhang Xingyang to leave enough wind tunnel experiments for their fourth-generation aircraft.
Zhang Xingyang just glanced at Song Tianxing and understood what he was thinking.
But there was nothing difficult for him to do.
Because of the wind tunnel base group, two hypersonic wind tunnels that can reach 16 times the speed of sound are currently mainly used.
That wind tunnel, which can only reach five times the speed of sound, has not been used for a lot of time.
And that wind tunnel, in Zhang Xingyang's expectation, was built for the new generation of fighter jets.
"The wind tunnel used for the blowing experiment is not a problem, but there are some things that need to be made clear in advance."
Zhang Xingyang looked away from the fighter jet in front of him, which was only coated with a layer of stealth coating, not dark gray camouflage, and exuded carbon fiber black.
"Due to some reasons in that place, the scope of your activities will be subject to certain restrictions."
Zhang Xingyang's words were not very clear, but Song Tianxing still understood what he meant.
There should be other high-density projects at the wind tunnel base.
Song Tianxing didn't say much, he just said that he would restrain his subordinates.
——
One column was covered with three-color plastic sheets and looked like an ordinary fleet of heavy trucks, driving on the national highway at high speed.
Vehicles passing from the side of the convoy would never have imagined that this rustic-looking convoy was transporting domestic and even internationally first-class fighter aircraft design models.
At the front of the convoy, two jeeps full of people opened the road.
These were civilian soldiers guarding the rear convoy.
Because long-distance transportation at this time was not as safe as later generations imagined.
All kinds of robberies and even murders and robberies can be seen.
Fortunately, their journey was relatively smooth and nothing special happened.
When the fighter model successfully arrived at the city more than a hundred kilometers away from the wind tunnel base, they stopped.
Next, people from the base will transport the fighter model that has been dismantled into parts after inspecting their fleet through the base's fleet.
"Thank you for your hard work, Comrade Chu."
The middle-aged man in charge of transportation breathed a sigh of relief after contacting Chu Xuan from the base.
Although he was not told what was in the containers on the car, his superiors told him before departure that the cargo was very important and must arrive safely.
"Nothing, these are what we should do."
After a brief communication with the person in charge of the transport fleet, Chu Xuan completed the handover of procedures.
From this moment on, these goods were officially transferred to the hands of the Wind Tunnel Base.
After letting everyone in the transport convoy leave, Chu Xuan and the others began to inspect the convoys.
Although they knew that there was a high probability that there would be nothing wrong with these containers, everyone still checked all possible places with extreme caution.
You can't blame Chu Xuan and the others for being so cautious, because something happened just this year that made everyone feel scared.
A herdsman on the grassland unexpectedly ran into the base for some reason.
Fortunately, it was later found out that he was just lost on the grassland and was not a spy sent by the enemy.
Although there were no serious consequences, it still made everyone more vigilant.
Fortunately, after the inspection was completed, no monitoring equipment or anything like that was found.
While Chu Xuan and the others heaved a sigh of relief, they pulled all the containers back to the wind tunnel base overnight.
In the base, Song Tianxing and other technicians in charge of testing work have already arrived.
However, many of them still complained about the security inspection before entering the base.
The base's entry inspection is very strict. You not only need to pass the metal detector, but you are not allowed to bring any metal.
Everyone who enters needs to take off their clothes for inspection.
This is what makes it a little hard for everyone to accept.
Fortunately, Song Tianxing was able to understand, so after persuading everyone one by one, everyone's emotions stabilized.
"I'm sorry everyone, these are the rules of the base, and each of us must abide by them."
Chu Xuan, who is responsible for the daily work and security of the wind tunnel base, after transporting the container back.
After understanding everyone's mood, I hurried over and said sorry a few times.
"However, we have brought your things back, you can go take a look first."
Although the technicians had some complaints before, everyone was actually subconsciously able to accept it, especially after the double consolation from Song Tianxing and Chu Xuan.
So when Chu Xuan said that their fighter model had arrived, everyone got into working mode.
Because the fighter model is large, it is dismantled into several larger parts during transportation to facilitate road transportation.
The technicians brought over by Song Tianxing were very familiar with the fighter jets they designed and manufactured.
It only took one day to reassemble the fighter jet.
In the thermal power plant, black coal is burning, driving the gas turbine to do work, and then outputting a steady stream of electricity to activate the shock wave device in the wind tunnel.
There is a big difference between the wind tunnel for testing fighter jets and the wind tunnel for testing missiles.
Missile wind tunnels basically use shock wave technology to simulate aerodynamic phenomena at hypersonic speeds by generating shock waves.
Fighter wind tunnels mainly rely on compressor blowing for testing, because the speed of fighter jets is not as abnormal as those of hypersonic missiles, which can reach more than ten times the speed of sound.
The fastest fighter jet in the world currently does not exceed Mach 4, and neither the SR-71 "Blackbird" nor the MiG-25 exceeds Mach 3.5.
Such a speed can also be achieved with a high-power compressor.
The fighter model in the wind tunnel can still remain stable in the strong wind of nearly one thousand meters per second.
This made many technicians' eyes light up. Before the wind tunnel experiment, although everyone had enough confidence in the fighter jet they designed by themselves.
But I still don’t know exactly what technical level it can achieve.
Now the performance of the fighter model in the wind tunnel proves that their efforts for more than a year have not been in vain. The fighter model indeed shows excellent aerodynamics.
However, Song Tianxing was not satisfied with this result, because according to the news from the Aeronautical Development Research Institute, their WS-10 thrust had reached its limit.
According to their previous calculations, a fighter equipped with two WS-10 engines can reach a maximum speed of Mach 3.2, but the current speed is still not enough!
Please vote for me, please vote for me! ! !
(End of chapter)
