What does radar look like? Isn't that the tablet? There are thin slits on the slab, and then there are some IFF identification antennas in front of the slab?

Of course not, it's just the antenna of the radar, the real radar, the antenna is just one part of it.

Now that it has been decided to reequip the J-8, the agreement has been reached, and China has already paid a part of the deposit in advance, the Americans are still moving very quickly, and now, they have sent a radar over to study how to install it.

There has never been such a large radar in China, and at this time, several radar experts who came with him were also studying this radar.

The radar is a whole, it seems that the front is the antenna, and the equipment behind it is integrated, just like a box stacked together, but its cross-section is not circular, even if it is the radar antenna in front, it is also a flat ellipse.

Qin Feng knew that this thing was to adapt to the F-16 fighter, and the nose of the F-16 was flat, on the one hand, because the air intake was below, and on the other hand, it was to precompress the air, if you look at the radar of the F-15, it was a circular section.

Now, Qin Feng also followed to the front of this radar, and studied it with everyone, this radar is numbered AN/APG-66, and after being exported to China, a new headfix was added, PRCF-82, this headfix also has a clearer meaning, that is, peace model 82.

Now, on the platform here, there is still this sign pasted, Qin Feng squeezed in and admired this radar together.

If you disassemble the Su-27 radar, you can see the comparison of the two radars, this kind of radar, which looks even smaller, because it has begun to use integrated circuits on a large scale.

If the radar is all eliminated from the vacuum tube, it is impossible, take the most important radiation source of the radar, the magnetron, it is an absolute vacuum tube, all radars are the same, whether you are an inverted antenna, or a flat plate gap, even if it is a passive phased array radar, it is like this, only the active phased array radar, completely get rid of the vacuum tube.

However, in addition to the vacuum tube, people began to popularize integrated circuits on a large scale, and now, this small box looks very large, in fact, the total weight is only 110 kilograms, and its mean time between failures has reached 100 hours.

If you compare the Su-27, the radar of this cargo weighs more than 500 kilograms, and if you count the heat dissipation system and power supply in the back, it is a ton of total.

Now, Qin Feng looked at this radar, and his heart was full of yearning, when will this kind of radar be manufactured in China, how good it would be!

Xiaoxue, you must come on!

"It's cold." At this time, on the An-12 transport plane, Xiaoxue couldn't help but say something.

After intense preparations, a few months later, they finally put the first airborne radar of the 14th Institute, which is also the country's first modern pulse Doppler radar with flat slot antennas, into the sky!

This is an An-12 transport plane, and at this time, where they are riding, the cold wind is waving.

This kind of aircraft is an aircraft developed and produced by the Soviet Union in the fifties, and it is also a wonderful flower among transport aircraft, because it is modified from passenger aircraft, and it is estimated that it is unique in the world, and in comparison, there are more cases of bombers being converted into passenger planes.

Because the predecessor is a passenger aircraft, there are many problems, for example, since it is a transport aircraft, it must be airdropped paratroopers, and the back is a common tail hatch form of a transport aircraft, which can be unfolded downward, which can become a bridge for paratroopers to go out.

However, due to the length limit, when it is on the ground, it cannot directly form an inclined plane, and it is necessary to add another cargo bridge on the ground.

However, due to the alteration of the tail of the fuselage, the airflow was disordered, so that once the rear door of the cargo compartment was opened in the air, it could no longer be closed.

In this way, they simply cancel the sealing of the cargo hold, the internal and external pressure is the same, and the hatch can be closed, otherwise, the internal pressurization, the pressure is strong, and the external high-altitude pressure is small, which is also a reason why the tailgate cannot be closed.

This problem is solved, but the cabin in the back is not pressurized and sealed, and once the rear is manned, it is quite uncomfortable.

The higher the altitude, the colder and the less oxygen, the harder it is for a person to breathe.

Now, this An-12 has become a test machine for airborne radar, and the radar is installed in the nose of the An-12, after all, the radar is not big, but in order to test the radar, it is necessary to have a variety of instruments, and now, the entire rear cargo compartment is occupied by instruments, and even because of the installation of these things, a temporary generator had to be added, at this time, the generator rumbled in the tail warehouse, in order to provide enough air to the generator, and also to prevent the exhaust gas from being discharged from suffocating them, so, The tail hatch is open, and it's even colder here.

When Qin Xue finished speaking, he felt that a military coat was put on, Qin Xue turned his head in surprise, looked at Li Zhiqiang, and found that he had taken off his military coat.

There was Li Zhiqiang's body temperature on the military coat, as well as the smell on his body, and for a moment, Qin Xue's heart was full of joy.

Before getting on the plane, I originally thought that there were instruments everywhere here, all of which were dissipating heat, and it was inconvenient to wear too much, so each person only prepared a military coat, but Qin Xue was not feeling well these days, so she felt that she couldn't resist it.

The two are in love with each other, and they have already told their brother that Li Zhiqiang's family conditions are not good, and there are not too many material conditions, and they are busy with work, and many times, the two have no time to whisper.

However, between lovers, sometimes it doesn't take too much, just like now, a simple little thing can be reflected.

Li Zhiqiang's inside is wearing a sweater, the sweater is woven with various colors of wool, it looks colorful, many poor people's homes, can't get together the same kind of wool, so they can only use this way.

Now, seeing his figure shaking, Qin Xue said, "No need, you will be cold too." ”

"I'm not cold, I'm sweating all over my body, look, our radar is malfunctioning again." Li Zhiqiang said, picked up the screwdriver, and it was time to disassemble it again to find the source of the fault.

Qin Xue's heart is very warm, but it's a pity that she doesn't have time, if she has time, she must buy a ball of wool and knit a sweater for her lover, a warm sweater.