An important measure of radar reliability is the mean time between failures (MTBF).

"Mean time Between Failure", the meaning of this phrase refers to the average time from one failure to the next failure of the product, is a measure of the reliability of a product, this is an average value, of course, according to this meaning, the average working time between two adjacent failures, can also be called the mean failure interval.

For radar, there are tens of thousands of components in it, in the previous era of electron tubes, the tube was ignited, the filament was burned, the gate contact and other problems emerged in an endless stream, a radar can work stably for several hours is good, if it is a bad radar, even a few minutes will have a problem.

In the era of transistors, it is much better, with the development of large-scale integrated circuits, it is said that they have been relatively stable, such a mature radar as APG66, this time has reached 100 hours, but the current 1471 radar will definitely not reach this level.

How difficult is it exactly? The antenna of the radar, processing is already super laborious, but after all, this is a problem that can be solved as long as it is processed, and the circuit behind it is even more difficult, without any reference, they have to design various AD and DA conversion circuits, have special data processing chips, and input various programs in it, and even some chips, there is no suitable one in China, and they must temporarily replace them with civilian chips, or even 14 to design their own chips, or, for the time being, replace them with discrete components, In this case, the initial work of the radar, is quite unstable.

However, in the face of these problems, they do not have any complaints, nor are they entangled, and now the test flight, that is, to find the problem, and then solve the problem, there is no terrible problem, solve the problem, isn't it?

Now, they are in such a mood, 1471 Radar, just like their children, no matter how hard they try, they must make it mature!

They made up their minds.

The An-12 transport plane continues to fly in the sky, for the new generation of pulse Doppler radar, the comrades of the 14th institute, are fighting tenaciously, the older generation of builders, can not be afraid of hardship, the other is not afraid of death, they must also carry forward this spirit, for the construction of the motherland, no matter how much it costs, it is worth it!

I don't know, where is my brother now? At the end of the year, you must go home, this is an agreement, it is not easy to convince your parents, my brother married a city man, my father is happy, if I know that I have found a rural person, I am estimated to be emotional, and I am waiting for my brother to solve the siege.

At this time, Qin Feng was looking at the radar in front of him, this kind of radar is mainly divided into seven parts, antenna, transmitter, receiver, digital signal processor, computer and control system.

Now, a new problem is how to stuff it into the nose of the J-8.

You must know that in order to facilitate operation, the circuit board of this radar is designed to be plugged and unplugged, which can be easily replaced, and their fighters are also in the side openings, so that it is convenient for ground service detection and maintenance, but what about the J-8, the frame in front of the nose is dense, like a mouse cage, and there is no way to open it at all.

What if one of the compartments is sawn off, will it not be strong enough to tear in flight?

In the past, I thought it was very simple to remove the old one and replace it with a new one, but if the installation method was different, it would be very troublesome.

Fortunately, this radar was originally F-16, the nose of the F-16 is small, much smaller than that of the J-8, if the nose is large, then you have to consider how to stuff it in, and now, you need to put a bracket on it to pad the radar.

The fighter is being dismantled over there, and the installation is being discussed here, it seems that the progress can be very fast, but Qin Feng knows that this progress will definitely not be high.

This involves a very serious issue, a system problem.

China has always been in accordance with the Soviet standards to design aircraft, which is very different from the design of the West, this is not just a simple rivet is different, the pattern of the screws is different, but involves a lot of deeper problems, such as different design ideas, different routes, etc., in short, want to install this kind of aircraft with Western avionics, it is difficult.

What about slaughtering them, will there be a lot of problems?

Tu Lao's side should be better, because the nose is newly built, and it will be designed according to the new indicators as soon as it comes up, so it will be much better.

The research and development of domestic military aircraft should also move closer to the West, and in particular, it is necessary to formulate a scientific and standardized standard. This requires the state to formulate this military standard, which is referred to as the first standard.

Wait a minute! Qin Feng suddenly thought of another question, let's install all these avionics now, but it seems that the issue of the Sparrow missile has never been mentioned!

The reason why the Air Force agrees with this project is mainly to intercept bombers in the north, for a long time, the J-8 did not have a suitable weapon system, and now, the problem of radar has been solved, what about missiles?

The introduction of missiles is even more important, although they are all called Sparrow missiles, but there are too many versions of Sparrow missiles, and the Americans can't fool them!

The development of the Sparrow missile can be traced back to the forties, yes, it was during the Second World War, when there was such an idea, of course, the level of electronic technology in that era determined that this missile must be no different from an uncontrolled rocket.

After twenty years of continuous development, until the battlefield in Vietnam, the AIM-7E-2 missile was considered to be more or less usable, and then, in 1982, the AIM-7M was born, and finally there was a qualified medium-range missile with stable performance! Its biggest feature, of course, is that it is equipped with a new type of single-pulse seeker, the technology of this seeker is actually developed by the United Kingdom, which is the heritage of a great power, although Britain has declined, after all, it is an old industrial country, gas turbines and the like, they were the first to get out.

Will the Americans hand over this state-of-the-art AIM-7M to their side? Or will you give your own AIM-7F missiles? If it's the latter, it's a bit behind.

So, Qin Feng cautiously asked: "Is this radar compatible with the AIM-7M missile?" ”

Directly ask what missiles to give, it's not easy to ask, or to put it another way, hearing Qin Feng's question, the American radar expert raised his head: "No, in your contract, there is no clause in your contract to order missiles from us at all." ”

It's strange, isn't this a gun without a bullet?