Chapter 681: Invisibility

On the Raptors, Song Lao realized his ideal of duck layout. Today is only the first flight. Judging from the opinions given by Chen Rui, the agility of this aircraft is quite high, not only better than the previous two. The generation machine is a lot higher, even higher than the third generation machine like the F-16.
Why? Because it is a duck layout, it is a positive lift, which is the advantage of this aerodynamic layout!
However, with only this model, Song Lao is not enough. According to the sequence of fighter development, one generation of equipment, one test flight, and one pre-research.
The J-7 is now equipped, and the test flight is the Raptor. The pre-researched one is a new generation.
Old Song couldn't wait any longer.
In the current Raptors project, we have achieved our goal of catching up with the West. The performance of this third-generation machine has reached Western standards. However, just catching up is not enough, we have to surpass it!
That's right, it is transcendence. No matter what the weak links in the domestic industry, transcendence seems to be a castle in the sky, but as an engineer of aircraft development, he must have this courage!
Qin Guan understood what Song Lao meant, and the expression on his face became solemn.
"Song Lao, what do you think is the greatest threat to our fighters?" Qin Guan asked.
What is the biggest threat to fighters? This is a very simple question. It can be the opponent’s fighter planes or ground-based air defense missiles. These can make the fighter planes crash and sink into the sand. In the wars of the past few years, the Sam Six missiles were famous. Ten thousand, hundreds of planes were shot down.
However, this is obviously not the answer Qin Guan wants. He must ask this question with profound meaning.
After thinking about it, Song Lao asked, "You mean radar?"
Whether it is a fighter plane or a ground-based air defense missile, the first step to find a target is to find it on the radar.
Not to mention the J-7, which is purely visual, it is already far behind. In a real war, I am afraid that it has not waited for it to fly in front of the opponent and use the aircraft cannon, and it has been shot down by the opponent.
Radar is the eye of the aircraft and the eye of ground-based air defense missiles. Radar is responsible for the important task of spotting aircraft.
Hearing what Song Lao said, Qin nodded his head, yes, Song Lao is smart, and he has found the key problem without his own guidance.
In the future sky, whoever can get rid of the radar's discovery will be invincible!
"Therefore, the first and primary goal of our next-generation fighters is stealth." Qin Guan said.
It is less than 80 years now. In history, the first time the outside world heard the word stealth, it was in 1981 when it was obtained from Eagle Country.
Eagle fighters have always led the world in terms of research and development. Their F-15 and F-16 have formed a generational advantage over the fighters of the bear country, but the bear country will not always be left behind. Therefore, they developed two new three-generation aircraft, the MiG-29 "fulcrum" and the Su-27 "Flanker".
In this way, the Eagle State Air Force felt a challenge. So in 1981, the senior officials of the US Air Force began the research and development of the next-generation fighter, aiming to develop a new fighter that could replace the F-15 Eagle as the main force at the time. In June of the same year, they issued a request for information on the "Advanced Tactical Fighter".
The code name for this is ATF. At that time, the ATF plan had three rigid requirements: stealth, supercruise, and shorttakeoff and landing. Later, super mobility was added and it became a typical term for 4S.
Stealth performance is the key to later generations of aircraft. But now, everyone in this era does not have this consciousness.
When Qin Guan talked about invisibility, Song Lao was taken aback for a moment. What are you talking about? Is it like Sun Monkey, can you change yourself?
Of course Song Lao didn't believe it.
"Lao Song, this invisibility doesn't mean that you can't see it with your eyes. It doesn't exist. When I say invisibility, I mean that it can't be seen by radar."
"How could it be possible that as long as the radar shines on the fighter, it will reflect the radar!" Song Lao expressed his opinion to Qin Guan.
Impossible, this is absolutely impossible, this is beyond one's own perception.
"However, we can reduce the radar reflection of the fighter through a special structure." Qin Guan said: "For example, the air intake, our current belly air intake, you can directly see the engine turbofan blades inside. These blades are huge sources of electromagnetic reflection. If we make the intake duct S-shaped and block the blades, the reflection can be greatly reduced."
"We made the plane into various angled slopes, so that when electromagnetic waves are irradiated, the electromagnetic waves will be reflected in other directions. As long as they are not reflected on the other party’s radar, it is not a 180-degree reflection. If the other party can’t receive it, it’s fine.
"For another example, our vertical tail, don't make a tall single vertical tail, but make two inclined vertical tails with large inclination, so as to reduce side reflections."
"For those that cannot be reflected away, we can lay a layer of electromagnetic wave-absorbing material on the surface of the aircraft to absorb the electromagnetic waves."
When Qin Guan mentioned invisibility, he definitely didn't just talk about indicators, but used simple and easy-to-understand descriptions to explain the invisibility scheme.
For Qin Guan from later generations, these plans are too simple and are the clearest.
"Through these methods, we can reduce the radar reflection of the entire fighter aircraft to the size of a ping-pong ball. In this way, if ground radar can be found a hundred kilometers away, it is now less than 10 kilometers away. I What do you think of this idea?" Qin Guan said to Song Lao.
Qin Guan gave too much information.
The plans one by one were simply unheard of and unthinkable. However, Qin Guan said this, but they were all so simple and clear. If he followed his plans, they were all feasible.
Old Song carefully digested each of Qin Guan's plans, the air intake, the fuselage, the vertical tail, and what stealth coatings were there.
Suddenly, he came up with an idea: "In this case, I'm afraid it will greatly increase the resistance of our fighter plane? Can it still fly?"
Can this thing fly? Historically, when the stealth machine was just developed, many people had such doubts. The first generation of stealth machine, F117, is now being developed in full swing, and only a few high-level executives know its existence. An absolutely confidential model. Anyone who knows it has such an opinion. Can it fly?
As long as the engine is powerful, the bricks can fly into the sky!