Chapter 157

There is an ancient profession called magician, which exists in both the eastern and Western world. Magicians are quite magical. They can perform magic and change all kinds of things. In fact, it is completely a cover up. It is impossible to create something out of nothing. They have prepared their tools in advance.

When performing magic tricks, a very important way is to divert the audience's attention. For example, holding a magic wand in his right hand drives the audience's line of sight, and all focus on his right hand. At this time, the left hand can operate secretly without being found.

Now, Qin Guan is also doing magic. There is no false and real magic. People can't believe it. If people see this situation, it will certainly arouse suspicion.

Qin Guan wandered around the cemetery for too long and forgot that there were so many people here. Now, he had to use this lowest way.

There's an earthquake!

When they heard the sound, everyone was stunned. Then they all ran towards the door.

Is the hangar strong? Normally, it should be solid and even be able to resist the bombing of ordinary bombs. However, that is in theory. In fact, who dares to trust?

Life is in your own hands. Of course, you have to run away at this time.

Just as everyone's eyes began to look at the door and prepare to run, no one noticed the change of the MiG-23.

There was a wave of space energy in the air. This wave was very familiar to Qin Guan. Looking at the shape of the MiG-23, he suddenly became one smaller and became an owl dragon fighter with two ribs.

After the washing of time and space, this Xiaolong fighter has returned to its best state again. Its vertical tail is also painted with the symbol 03, which represents the third prototype.

Now, Qin Guan looks at other people running. If so many people cause congestion, it's not good. There may even be a stampede accident. Those old guys can't run.

"Well, you can turn around. I've brought you a new fighter." Qin Guan's voice sounded again.

New fighters? What happened?

Those with fast feet had to run to the door. Those with slow feet had not started running. They just turned their bodies. At this time, when they heard Qin Guan's words, they turned around.

It's amazing that the MiG-23 has disappeared. What appears in front of them is a plane they've never seen before.

Needless to say, just looking at the integral windshield of the nose is so attractive.

The cockpit cover is divided into two parts. The upper part can be turned over for pilots to enter and exit, and the front part is fixed. Now, due to technical constraints, the front of Han fighters is three-piece windshield, which is divided into three parts with two thick frames.

These are to block the view.

Therefore, for more advanced aircraft in later generations, the front gear is simply cancelled, which is directly a cabin cover of the whole. Just push it down, and the field of vision is clearer.

"What kind of plane is this?" someone immediately asked.

"This is the advanced aircraft I mentioned," Qin Guan said. "It uses turbofan engine and edge wing technology to improve its aerodynamic performance, especially its mobility at high angles of attack. It also uses flat panel slot radar."

With that, Qin Guan went to the nose, took apart two removable bolts and lifted the radar cover of the nose.

Inside, a circular flat radar antenna appeared. In an instant, everyone exclaimed, "sure enough!"

The purpose of radar antenna is to radiate electromagnetic waves, so the early radar antenna is like a pot cover. However, the efficiency of this method is very low. Moreover, with the increase of radar power, the weight of radar antenna is also increasing, which leads to new problems. Driving radar antenna to rotate is too heavy.

Therefore, some people have an idea. They simply turn the radar antenna upside down, use two reflecting surfaces, and go out after two reflections, so as to save the trouble of rotating the heavy paraboloid antenna. This is called inverted Cassegrain antenna, or inverted Cassegrain antenna for short.

The technology of inverted card antenna is relatively simple, easy to achieve high gain, low manufacturing cost and convenient for a large number of equipment. The disadvantage is that due to the use of double reflecting surfaces, it takes up a lot of nose volume. If it is to be used, the nose volume of the fighter needs to be large enough, and its weight is very heavy, and the performance degrades seriously during scanning.

Therefore, the western world has eliminated the inverted card antenna and began to use the latest flat panel slot antenna. As the name suggests, its radar antenna is a flat panel with appropriate slots on it to radiate electromagnetic waves.

The weight and volume of this flat slot antenna are relatively small, and it is very easy to achieve low sidelobe. The performance does not degrade during scanning. It also has the potential to upgrade to phased array.

In later generations, after more than 20 years of hard work, the Han country finally mastered the production of this radar. The kjl-7 multi-mode pulse Doppler radar stuffed in the nose of the current Xiaolong fighter is a self-developed flat slot radar.

Some people from avionics development units came to the scene. When they saw this radar, their eyes were straight.

We must reverse copy and get this kind of radar out!

"What kind of air intake mode does it use? Neither fish nor fowl, and what's the matter with the bulge of the air inlet?" the man who had just asked Qin Guan began to ask again.

Didn't you say abdominal air intake? Now it's the abdomen, not the abdomen, not both sides. What's this way?

"This is a compromise air intake scheme." Qin Guan said: "the abdominal air intake is the best, but it is not necessarily for our existing conditions. In the field airport, if the runway is not clean and the air is sucked into the air intake, it will hit the engine and cause accidents. The air intake on both sides can not improve the efficiency of high angle of attack, so this two rib air intake is adopted."

"As for this drum, please study it. This is a way to reduce the weight of the aircraft. With this drum, the air inlet adjustment at different speeds can be realized, which is the most convenient and effective."

The air inlet of the aircraft should be adjustable. At low speed, the air inlet should be fully open to absorb enough air. At high speed, close part of the air inlet to prevent excessive air flow and engine surge.

The F-16 inlet does not have a regulating device, so its maximum speed is only Mach 1.6. It can't go up any higher. With a regulating device, the J-10 can fly to Mach 2.

Old song's eyes are bright. Since he started his work, he has been engaged in the research of aerodynamic layout. This kind of inlet looks very contrary to the sky.

"Oh, my God, look at its cabin!" at this time, a technician climbing up the gangway saw the cabin inside and immediately shouted.