Chapter 1,119: The First Flight of the J-20 (Part 1)
"Hmph, what's the big deal about having a few stealth aircraft? Taking advantage of this opportunity, we will send F-22 fighters there. As long as we enter the area this time, we will never exit again!" Someone painted this
In the white room, a voice said coldly.
"Yes, they only have single-engine stealth aircraft. They have no supersonic cruise and no super maneuverability. The only thing they have is stealth. They are not considered fourth-generation aircraft at all. Our F-22 is the real
Only with this kind of fourth-generation aircraft can we scare them and let them know who has the final say in this world!"
"Do you think there will be similar aircraft in the East?" At this moment, a worried voice sounded.
"Of course it's impossible." The first person who proposed it said immediately: "Dongfang doesn't have this capability at all. After all, they still lack a lot of aviation technology. They may combine two J-35s together.
, we have built a twin-engine J-35, but this is definitely not comparable to our F-22."
It is not possible to achieve the so-called 4S performance by combining two engines together. It is also impossible to achieve the effect of one plus one being greater than two by stacking the components of two fighters together. There are many technical problems in this.
For example, engines, although the thrust of the two engines is large, they are also heavy. If the thrust-to-weight ratio of the engines does not reach 10, then even if more engines are piled up, the aircraft will not be able to cruise at supersonic speeds or have super maneuverability. France's
Except for gusty winds.
Dongfang has indeed caught up in some technologies, but in some technical fields, it is still lagging behind. Take aviation engines as an example. This thing tests the accumulation of technology and cannot be achieved overnight. Dongfang can imitate the R79 and make
There is a turbofan 15 that can be used in fourth-generation stealth aircraft, but if you develop it yourself, the product may not be better than the turbofan 15, especially in terms of reliability, it may be much weaker.
"Who did you listen to?"
"Zhang Zhong, in the previous programs, Zhang Zhong once specifically talked about this project. Dongfang really wants to build a new heavy-duty fourth-generation stealth fighter, but it is just a thought. The United States has been working on it for so many years before it can
The -22 was not mature enough, and because it was too expensive, less than two hundred were produced. As the economy in the East developed, it was absolutely impossible to build such a heavy-duty fifth-generation aircraft. At most, it would be two J-35s.
We can get together and come up with a modified version of the J-35, but it will still be impossible to achieve supersonic cruise and super maneuverability."
The Zhang Zhongshuo program is the most professional and authoritative military program in the East. It has many viewers all over the world. Even in the United States, the source of intelligence for many people is the Zhang Zhongshuo program.
At this time, after hearing his words, everyone present became excited.
"That's right, their economy has just developed. A chicken's fart is less than one-tenth of ours. They simply don't have the ability to develop advanced fighter jets!"
"Our F-22 is the most advanced!"
"You think, should we change the classification of aircraft? Those European fighters are also clamoring that except for their stealth, everything else is the same as our fourth-generation aircraft. The East has stealth fighters, but other aspects are ordinary. We
Should we characterize the F-22 as a fifth-generation aircraft? The others are all fourth-generation aircraft, and only our F-22 is the world’s first and only fifth-generation aircraft?”
"Can!"
Zhang Zhong's identity as a strategic swindler is already known to everyone, but there are still many people who firmly believe in Zhang Zhong's statement.
Just when the Americans were thinking about defining their F22 as a fifth-generation aircraft, in the east, in the morning light, a fighter plane was slowly dragged out of the hangar.
The exterior of the aircraft is yellow and has no stealth coating. It looks like a big yellow duck.
Yes, it looks like a duck, because it is a fighter plane with a canard layout!
The diamond-shaped nose is made smoother, so that the fold line on the top of the nose is not very clear. The air inlets on both sides of the bottom are just against the sides of the diamond, with two bulges. This is the famous DSI
Intake duct.
Above the nose is a single-seat cockpit. The entire cockpit cover is flipped backwards. Although there is a partition frame in front, this partition frame only serves as a reinforcement and does not separate to form a fixed windshield.
The F-16's integral bubble canopy is the same.
Through the windshield, you can see the green diffraction HUD inside and the half-exposed ejection seat.
On the line above the air intake, extending past is the canard.
The J-10's canards are above the main wing, forming an up-and-down staggered structure. This is to utilize vortices and reduce transonic drag. The center-mounted canard layout was once considered the best canard.
But on the J-20, this design changed. In order to pursue the stealth effect, the wing roots of the canards and the main wing must be on the same horizontal plane, so as to reduce the radar reflection area.
At the same altitude, if you want to reduce transonic drag, the canards must be turned upwards and the main wings must be turned downwards. This achieves a good balance between stealth and aerodynamic efficiency.
However, this will also cause the problem of insufficient utilization of vortices. After all, the distance between the canard and the main wing is a bit far, so the canard is moved backwards, adding an extra edge to the fuselage before reaching the main wing!
The size of this side strip is very large, larger than the small side strips on the Typhoon. It is a completely independent main vortex generator.
This aerodynamic layout is very complex. The vortex lift of the aircraft mainly comes from the side vortex and the main wing leading edge vortex, and the canard in front is not idle either. The vortex generated by the canard can induce the fusion and superposition of the first two to enhance the canard.
The layout of the slatted wings is stronger than the simple slats and the simple canard wings, which greatly improves the maneuverability of the fighter aircraft!
When our engine is not strong enough, we have to use aerodynamic layout to make up for it!
The design of the entire front fuselage is eye-catching, and the rear fuselage also has great features. For example, the two cambered V-shaped vertical tails are not ordinary vertical tails, but full-motion vertical tails! The entire vertical tail is
A rudder surface is fully movable. The advantage of this is that the entire rudder surface can generate aerodynamic torque, which greatly reduces the area of the vertical tail. Moreover, the two rudder surfaces can not only move in the same direction, but also move differentially to achieve more precise movements.
Many functions.
In addition to its vertical tail, it also has ventral fins, which poke under the vertical tail and form an inverted V shape. The area is small, but it can provide more control capabilities.
That’s right, these pelvic fins can move too!
The design of the entire aircraft is similar to that of the MiG 1.44, including canards, side strips, leading edge maneuverable flaps, main wings, trailing edge flaps, ailerons, fully moving vertical fins, ventral fins, and rotatable aerodynamic rudder surfaces.
Reached 16! At the same time, there are at least five kinds of vortices, which are simply utilizing everything that can be used in human aviation technology.
These technologies have brought the J-20 powerful maneuverability, but also brought terrible integration difficulties. If you want to take advantage of these, the complexity of the flight control law is unimaginable, and the writing of the flight control is also difficult.
Difficult, you must know that most of these rudder surfaces are non-linear!
If you look from the direction of the nose of the aircraft, you can see that the aircraft is very wide and the entire aircraft is a huge flying body.
Seeing such a fighter plane appear in front of him, Qin Tao's mood was very complicated.
But someone is happy.
A large group of leaders from the Air Force came. Mr. Lin, who had retired to work on the Bomb Twenty, also came. When he saw Qin Tao, he immediately ran over.
"Mr. Qin, are you here too? Yes, it is said that this aircraft has a modified carrier-based aircraft model, and the Navy has also come over. How about it? How do you feel when you see this aircraft?"
"Another of our shortcomings in the aviation industry has been filled." Qin Tao said: "Our Mingzhou Group can only develop a medium-sized aircraft at most. For such a big thing, we still have to fly to do it!"
The maneuverability of the J-31A series aircraft is actually not high. After all, it is a single-engine aircraft. It focuses on stealth and can be used all over the world with one move. Of course, this low maneuverability is compared to the fourth-generation aircraft. If it is compared with the fourth-generation aircraft,
Compared with other third-generation aircraft, dogfighting and other such things are still no problem.
The F-22 is the world's first fourth-generation heavy-duty aircraft. The highly praised 4S capability is still very strong. This aircraft is specially designed for air control!
"We have also received a lot of support from you in our research and development. You are the one who built the front fuselage. Its stealth performance is quite good. We also built the rear rudder. In this way, we have achieved great results in both stealth and maneuverability.
Breakthrough progress, even without the vector nozzle, we are confident to have a close combat with the F-22!"
Another voice sounded, and the gray-haired Mr. Song came over.
At the beginning, the Mingzhou Group came up with the J-31A. The appearance of this aircraft immediately embarrassed Song Lao's J-10 status. The J-10 had good performance, especially its high maneuverability and was easy to fight at close range, but
After all, there is no invisibility.
Although the J-10 has a small amount of equipment, Mr. Song is not discouraged, but urgently needs to research advanced fighters. The Mingzhou Group is developing medium-sized aircraft, and the heavy-duty aircraft must be left to Chengdu! This aircraft must compete with the F22
, the performance must be better than F22!
I don’t know how many days and nights I have spent, and I don’t know how many times I have been blown through the wind tunnel. Over the years, Mr. Song has not had a good night’s sleep, and he finally succeeded in tinkering with this airplane!
Back then, when the J-10 made its first flight, everyone was very worried, for fear of any accident. But now, when the J-20 makes its first flight, everyone no longer has any worries or doubts, because everyone is full of confidence!
"We don't have a vector nozzle yet?" Mr. Lin was stunned.
"Yes, not yet. We are still developing it. If the lifespan is not up to standard, we will not install it. However, our flight control has made reservations. As long as the lifespan of the vector nozzle is sufficient in the future, we will
It can be relaunched and the aircraft's maneuverability will be improved to a higher level."
A normal aircraft tail nozzle only blows air backwards to provide power to the aircraft. Maneuverability is achieved by each steering surface, while a vector nozzle means that the nozzle is moveable. By changing the direction of the engine jet wake, the aircraft can be maneuvered.
Planes are more maneuverable.
For example, if the aircraft wants to climb upward, it can not only use the horizontal tail rudder to pry off the tail and raise the nose of the plane, but also rotate the nozzle upward to blow the air upward, making it easier for the nose of the plane to climb.
The shorter the time it takes to lift it up, the more sensitive the aircraft will be.
One of the hallmarks of fourth-generation aircraft is super maneuverability, which requires vector nozzles to function.
The F-22 engine is equipped with a binary vector nozzle, which is actually a simple baffle. The airflow can only be deflected up and down. It looks like a rectangular structure. Lao Maozi has always attached great importance to maneuverability and has developed it a long time ago.
The ternary vector nozzle, the nozzle can not only move up and down, but also move left and right. It is also called an omnidirectional nozzle. It looks round in appearance, no different from a conventional nozzle, but the nozzle is divided into many pieces, each piece has
Special hydraulic lever control allows the entire nozzle to change its angle in any direction.
However, the high-temperature and high-pressure airflow ejected by the engine poses a great threat to the nozzle. The nozzle can still withstand it if it is fixed. If the nozzle is movable, it means that the service life is very poor.
Ah San has the best say on this point. When Dongfang bought the Su-30MKK, Ah San will buy the Su-30MKI. The performance must be better than that of Dongfang. All fancy things must be added, such as canards and vector nozzles.
, it doesn’t matter if you add a little more budget.
Lao Maozi is also very good at deceiving, claiming that the life of the vector nozzle of the matching AL-31FP engine is 250 hours, and can be extended to 500 hours after upgrading. Ah San feels that this life is not bad, after all, the life of Uncle San’s engine is only a few hours.
Hundreds of hours? But when they got the plane, the nightmare began.
This chapter is not finished yet, please click on the next page to continue reading the exciting content! What is 250? Ah San himself is 250! Their Su-30MKI fighter must maintain the vector nozzle after 20 hours of flight, with a maximum of 50
It needs to be replaced every hour. For an aircraft that can easily fly for four or five hours, it is necessary to repair the chrysanthemums of the aircraft every four or five flights. It is definitely a big project that is expensive and time-consuming.
Even now, the lifespan of the vector nozzle is not very long. The domestically produced J-20 has not installed such immature things on the aircraft. They are still very sensible.
"The design of our aircraft is very good. It can fly to 9G easily just by relying on this aerodynamic shape. If we add vector nozzles, I'm afraid it will easily knock the aircraft out." Qin Tao said at the side.
In fact, vector nozzles are not used very frequently in modern fighters. Although they are very maneuverable, the pilot's body has limitations! Moreover, high-value aircraft rarely engage in close combat. If the horse stumbles, the loss will be
It's very big, and it usually fires from a distance. Once it gets into close combat, it can cruise away at supersonic speed at any time.
In many confrontation trainings, European pilots were helpless when facing the F22. As long as the F22 turned on supersonic cruise, it meant waving goodbye. They wanted to catch up but could not catch up, and the initiative was completely in the hands of the F22.
"I just don't know if our plane can cruise at supersonic speed?" Qin Tao continued to ask.
It doesn’t matter whether it has vector nozzles or not, but as a fourth-generation heavy-duty aircraft, it must have supersonic cruise capabilities, right?
"The supersonic cruise capability mainly depends on the aircraft's appearance design and engine." Mr. Song said: "The appearance design of our aircraft is longer and has less resistance. Next, it depends on the engine."
The J-20, a fourth-generation heavy-duty stealth aircraft, is slightly larger than the F22. There is no way around it. The canards, side wings, and main wings all add up to a very long length. Moreover, Dongfang’s engine is not powerful and the fuel consumption is very low.
The consumption rate is higher. In order to maintain sufficient range, the only option is to enlarge the aircraft body.
That's it for the body, now let's look at the engine.
"Then is the performance of our engine okay?" Mr. Lin asked anxiously. This is what he is most concerned about. You, Mr. Song, should hurry up and say it.
"Currently, we are using two turbofan 15s. According to theoretical derivation, at an altitude of 10,000 meters, the aircraft should be able to fly to Mach 1.3 without afterburner. When we have improved turbofans 15
Only after A is installed can it fly to Mach 1.5."
The maximum speed of the fighter cannot be used for cruising, because the afterburner must be turned on at the maximum speed. At this time, the fuel carried by the fighter will be consumed at an alarming rate: specifically, the famous Tomcat fighter can be used. If it is turned on
If it reaches afterburner 5, even if the plane is fully loaded with fuel, it will burn out in three minutes. This is much more powerful than stepping on the accelerator of a certain Zhijie that fills the fuel tank.
In addition to consuming too much fuel, the engine cannot bear it, and the afterburner can only burn briefly. Only a pervert like the MiG-25 can continue to use afterburner to exceed Mach 2.5. Relying on more than a dozen tons
The fuel in the machine is burning continuously, and nothing else can compare with it.
Most fighter jets can fly at supersonic speeds with afterburner turned on, and can even reach Mach 2 or above. However, currently only the F-22 can fly at supersonic speeds without afterburner.
This kind of fighter plane relies on the incredible F119 engine. Its single maximum thrust is 104 kilonewtons, its afterburner thrust is 156 kilonewtons, and its thrust-to-weight ratio exceeds 10. Looking at this maximum thrust alone, when afterburner is not turned on,
If it can reach 104 kN, you know how powerful it is. An ordinary big push is only about 60 to 70 kN without afterburner, and it only exceeds 100 kN with afterburner.
The F119 does not turn on afterburner, just like many engines when they turn on afterburner. Of course it can fly at supersonic speeds.
Currently, the only turbofan available in China is the 15-inch turbofan. The afterburner thrust is large enough, but it is heavy. The thrust without afterburner is not as good as that of the F119.
Therefore, it can only fly at supersonic speeds up to Mach 1.3.
"For supersonic cruise, flying to Mach 1.3 is enough." Qin Tao said.
He just said this to comfort people, but Mr. Song was very surprised: "Mr. Qin, it seems that you are really an all-rounder and know everything. You also know that Mach 1.3 is the dividing line!"
At transonic speeds, air shock waves will be generated, which is the unique cone-shaped structure that appears on the nose of the aircraft in some photos. Only when it exceeds Mach 1.3, the airflow will become smoother. After exceeding Mach 1.3, the fighter can
Carry out maneuvers calmly, especially when launching missiles, without worrying about being bounced back from the wall of compressed airflow flying towards you. It can be said that Mach 1.3 is the dividing line of supersonic speed. If you exceed it, it will be calm, but if you cannot exceed it, it will be a storm.