At the beginning, when Tu Lao was preparing to introduce avionics equipment from abroad and improve the J-7 fighter, two improvements were finally canceled, one was pulse Doppler radar, and the other was the inertial navigation system.

This thing may seem inconspicuous to say, but for pilots, it is crucial.

The pilots of the older generation all have this experience, for example, General Lin has carried out transfer flights many times.

Generally speaking, because the range of one's own fighter is not large, so when flying, the main thing is to remember the landmarks, as long as the air defense of the important place, the landmarks around the area where the fighters are deployed are clearly remembered, as long as you look at the landmarks on the ground, you will know where you are, so as to avoid the problem of navigation.

What if you want to make a transition flight?

It's definitely a troublesome errand.

For bombers, it is the navigator's business, and for fighters, if it is a formation, although it is the task of a long plane, every pilot in the formation must be able to operate.

First of all, you should draw the route, measure the distance and the true course on the map, and then check the magnetic difference to calculate the course, and calculate the flight time according to the distance and speed. Before the flight, according to the wind direction and speed of the day, calculate the ground speed and deflection and consider the compass of the aircraft to determine the course and time that should be flown to fly.

In this way, in the transition flight, it is basically to take a chart, in the sky, while flying, while marking the track, it is quite tedious, constantly looking at the speedometer, course, to determine whether it is yaw.

And now, everything can be handed over to the equipment, this is the inertial navigation system, the core of the interior is the gyroscope, which provides a datum, and then, when the course changes, you can know the deviation from the gyroscope, so that, cumulatively, you can navigate.

"Our navigation system has an average error of 0.7 knots." Colonel Middo went on to explain: "This error should be considered very small. ”

Any system has errors, and an error of only 0.7 nautical miles after an hour of flight is nothing for fighters.

Why import advanced fighters from the West? Because all the domestic technology has fallen behind, and there is a big disconnect with the West, now direct introduction is the best way to improve one's own combat effectiveness.

General Lin kept sighing in his heart that the backward situation must be changed as soon as possible!

"We'll talk about the specific navigation flight when it's time to fly, and for now, we'll move on to other systems." "Our flight control system is so advanced that no matter how the pilot operates, it is impossible for the pilot to let it go into a spiral unless you disconnect the flight control system," said Colonel Midau. ”

In the flight of domestic fighters, Qin Feng has already entered the tail spin more than once, this is simply a life of nine deaths, if it were not for his experience, I am afraid that he would have become a martyr long ago.

The Mirage 2000 is a fly-by-wire operating system, which is equipped with an angle of attack limiter, which can usually ensure that the aircraft does not enter the stall deviation state, and can be automatically controlled so that the aircraft does not produce side slip, so that it is difficult to enter the stall spiral.

Looking at the two of them, Colonel Mido added: "If you can drill the plane into a spiral, I will lose you a case of champagne." ”

General Lin loves wine, and when he heard Colonel Mido say this, General Lin's eyelids blinked, and he quickly calmed down, this bet is not necessary, because people are full of confidence.

As long as the system design is perfect, it is simply possible for pilots to fly without worry.

General Lin remembered the domestic project again, the project of the 601 Institute, which still uses hydraulic control, can not meet the needs of future air combat at all, and the pilots need to be liberated from tedious flights and spend more energy on operations.

General Lin thought secretly in his heart.

Qin Feng is also recording carefully, isn't he? When the time comes, I'm going to give it a try and see if I can get into the spiral!

Anyway, looking at their confident appearance, even if they enter the spiral, they will definitely be able to change it, right?

"Okay, let's go on to introduce that the normal flight overload of this aircraft is 9G, but in the case of pulling the lever hard, the operating system will unlock the limit, and the maximum overload can not exceed 11G."

9G, 11G, these numbers, in the mouth of Colonel Mido, seem to be said easily, however, both of them were stunned, such a big overload?

True, the F-16 can also achieve such an overload, but that is only a publicly available data, and no one knows what the actual situation is.

Now, the aircraft that we are about to test fly can be pulled to an overload of 11G?

Can the body stand it in such a situation?

"In a test flight, we can also try, of course, if you think it's dangerous, forget it." Colonel Middo said.

"Gotta try." Qin Feng replied that the other party's question may have been unintentional, but Qin Feng knew that he must not let him look down on him.

In the case of negative overload, the blood of the whole body will rush to the brain, which will make people's faces flushed, and the blood vessels of the brain will burst at any time.

In the case of overload, the blood of the whole body will flow to the lower body, and at this time, the brain will be ischemia, and the eyes will be black. If the overload is too great, the person will even faint due to cerebral ischemia.

So, how can this be avoided?

First of all, of course, is exercise, the physical fitness of the pilot, the requirements are quite high, after a variety of endurance training, to exercise the pilot's physical overload resistance.

Fighter pilots are all one in a hundred, and the selection criteria for transport aircraft and passenger aircraft are different, which is a big reason.

Therefore, some people say that the pilots of transport planes and passenger planes can be transferred to the fighter unit at any time once they are in wartime, but this is just an imagination, and it is impossible to do it at all due to different physical conditions.

Of course, with the advancement of technology, there will also be technical means to solve it, which is anti-load clothing.

The gas drawn by the engine compressor or other air sources is inflated to the air bag of the anti-load suit through the load pressure regulator, and the air bag is inflated, the surface of the clothing is tightened, and the abdomen and lower limbs are put under pressure. This resistance to pressure prevents blood from being transferred to the lower body under positive overload, thus ensuring the circulation of blood to the head. Countering pressure also prevents the diaphragm from moving downward. The anti-load suit can improve the pilot's ability to resist overload to a certain extent, but the real anti-overload has to rely on the human body itself to resist.

Of course, Qin Feng will not admit defeat, although when driving a domestic fighter, he will pull up to 6 or 7 overloads at most, but Qin Feng firmly believes that he can withstand the test.

"Okay, let's move on to the engine."