Chapter 1424: Visit the stealth machine model

"How far has the pre-research of the new fighter been reached?" Qin Guan asked Song Lao.
At the end of 1981, Qin Guan once visited here. At that time, Song Lao reported to Qin Guan. After the J-10 completed the test flight, Song Lao gave the task of modification to his subordinates, and he himself, Bring the pneumatic team to study the layout of the next generation of fighters.
However, Song Lao was also worried about conflicts with Lu Lao's project. After all, Lu Lao also planned to transform the J-11 into a stealth model. Two fighters were developed at the same time, and the waste was too huge.
However, Qin Guan gave a lot of support. So, with the support of Qin Guan, Song Lao's research and development officially started. Now, two years have passed, how is Song Lao's progress?
"We have made a wooden prototype." Song Lao said.
Even now, Hanxin Technology Co., Ltd. has been able to manufacture advanced computers of this era, and has begun to use computer aids extensively in design, but wooden models are still a must.
When Song Lao said that a wooden prototype had been built, Qin Guan was quite excited: "Go, let's take a look!"
In that parallel world, in this era, the J-10 has not been formally approved yet, and under the promotion of Qin Guan, the research and development of the J-10 B has now been completed, and even the latest J-20 has come out with wooden prototypes. How can you keep Qin Guan from getting excited?
Qin Guan took his wife and children to investigate here. On the one hand, he took the children to visit the landscape here, and on the other hand, he came to see the progress here.
Now that there is already, Qin Guan is certainly quite excited.
"Aren't we waiting for Chen Rui to come down?" Song Lao asked.
Qin Guan shook his head: "Don't wait, let him fly again, let's go and see."
So leaving Chen Rui who was testing the mobility of the J-10 in the sky, Qin Guan walked into the workshop with the Xiucai under the leadership of Song Lao.
At the beginning, in the early stage of the design, Mr. Song said that the duck layout should be adopted. Now, what is shown to Qin Guan is a double-engine heavy aircraft with a duck layout.
"The sky in the future belongs to the stealth machine, so when we design, the main consideration is stealth." Song Lao said: "Ms. Qin, this is your bold prediction. We absolutely agree with it. "
This is also an adventure for Song Lao, because up to now, the Air Force has not invested any funds in the fourth-generation aircraft project. The current projects are all self-funded research and development projects.
In the past, this was simply unimaginable. If the superior has an order, there will be a development plan below, otherwise, it would be equated with crime, which is a crime of wasting the wealth of the motherland.
But now it’s different. The country is carrying out economic reforms and reforms, which has shown great vitality. In the research and development of new fighters, they can finally do it themselves. They have already made a lot of money in the production of the J-10.
Stealth depends on the wave-absorbing coating on the one hand, and on the other hand, it depends on the shape design. Simply put, the shape of the aircraft should be made into an inclined plane to reduce the vertical reflection of radar waves and scattering to other directions. Go up.
This approach must also be combined with the pneumatic layout, and pneumatics should not be ignored in order to take this approach into consideration.
One extreme of this is the F-117. This aircraft is fully focused on stealth, resulting in an aerodynamic disaster. When designing, some people even did not believe it could fly, but fortunately, people are very awesome.
At that time, it was also because the computer technology was not well-developed, and the next few aircrafts looked very beautiful.
Now, our computer simulation technology is already very powerful, and the server composed of multiple Hanxin CPUs is also serving scientific research.
The aircraft model in front of me is very similar to the J-20 in later generations.
Song Lao has studied the duck layout for more than 20 years, and now it's finally time to bear fruit.
"In our consideration of stealth, the canard is the easiest way to increase the radar reflection surface. Therefore, we deliberately reduced the area of ​​the canard, and in order to achieve the same effect, the canard was advanced." Song Lao said. Qin Guan introduced, because Song Lao knew that Qin Guan was also an expert.
The J-10 adopts a medium-distance coupling method. This is the best solution after its own research. It effectively utilizes the vortex of the canard and has a powerful control effect.
However, Eagle Country engineers have said that the best canards are on enemy aircraft, which means that this kind of thing has a large radar reflection area. Now, the way Song Lao adopts is to advance the canards of this verification aircraft model. The position of the relative main wing is further forward than the J-10, which increases the moment arm and enhances the utility, so the smaller canard can achieve great effects.
"But in this case, the vortex generated by the duck wing cannot be used by the main wing. Therefore, you have added side strips behind the duck wing." Qin Guan continued.
When Qin Guan said this, Song Lao immediately showed admiration. President Qin immediately understood his own design. Canard wings can produce vortex. The development of the third-generation aircraft is the use of vortex. Take a look. All fighter planes are beginning to engage in eddy currents, whether they are canard wings or side strip wings, they all use eddy currents.
"Yes, it is the side strip, and ours is the movable side strip, behind the canard. The side strip can be controlled to sag, and the movable side strip can strengthen the vortex lift and control the vortex direction. In this way, let the aerodynamic control The ability has been further improved." Years of accumulation have been demonstrated now. In terms of playing pneumatics, I am afraid that no one in the world can play Song Lao.
Looking back again, the tail is vertical.
A tall vertical tail is the main method of radar reflection. Therefore, if you want to be invisible, you must tilt the vertical tail. In this case, one is not enough.
Double-engine and double vertical tails, and the vertical tail is inclined to the outside, so that the radar waves reflected by the vertical tail can go in other directions.
The price is that it is complicated to control, and Song Lao's design is simply a nightmare for flight control designers.
Even the F-22 and F-35 are conventional fixed vertical tails and movable rudder surfaces, while the aircraft in front of you has a fully movable vertical tail.
In this way, the programming of the flight control is extremely complicated. There are more than 20 control surfaces on the entire aircraft, which makes the programmer crazy.
"No way, we don't have a powerful engine, we can only get back the advantage from the aerodynamics." Song Lao said.
According to the plan, the new generation of engines will have a thrust-to-weight ratio of 10, but we don’t have it. Spey’s thrust-to-weight ratio is only 5. The current F110 and its own-designed engine have a thrust-to-weight ratio of less than 8. Then it cannot meet the requirements of a new generation of fighters.
Another reason is that there is no vector nozzle technology.