The mapping of the ground is to provide information support for the ground attack of the fighter, while the ground mapping of pulse Doppler radar depends on the Doppler beam sharpening function to realize the terrain mapping of the ground.

With the function of topographic mapping, the radar can realize the linkage with the aircraft autopilot, which is a necessary capability for the fighter to attack at ultra-low altitude, and it is also a necessary element for the fighter to use various precision ground attack ammunition and track ground targets.

It can be said that a fighter plane that truly has multifunctional combat capability must possess the most basic topographic mapping capability, and no matter how topographic surveying and mapping is realized, this must be necessary anyway, and this is also necessary for the FC-17 operation.

Since the performance requirements were put forward early from the beginning, the development of the 7806 radar here must have these considerations.

"This is reassuring, when the EL/M2035 radar has the function of terrain mapping, we will definitely have no problem developing the 7806 radar now."

Since there is no problem with the important topographic mapping function, Yang Hui already knows most of the capabilities of this radar, as long as the weight can be controlled, the problem will not be too big.

This radar should have all the functions, and what you need to care about later is all kinds of data, and the most important thing in the data is the detection range of the radar.

The detection range of the radar also has approximate data at this time, which is derived by scientific researchers through the calculation of radar power, or has a certain reference significance.

Originally, these data should have been kept secret, but the object of such secrecy certainly did not include the developer of FC-17.

When the data was placed in front of Yang Hui, Yang Hui and the three accompanying people were stunned.

"Radar upward view 70km. 46km downward, topographic mapping greater than 140km? ”

The first time Yang Hui saw this data, he didn't believe it. I am afraid that such radar performance can only be achieved by at least the heavyweight radar of the EL/M-2035 radar, as a lightweight and reduced version of the 7806 radar. It is possible to achieve performance without shrinking......

This simply subverted Yang Hui's view of this radar, what is the level of performance of this radar now?

To make the simplest comparison, the US-made APG-67 radar has an upward view of 72 km and a downward view of 39 km, and such data has reached the world-class level of light radar at least in terms of detection range.

At the current level of radar in the republic, the development of such a radar is definitely a cannon battle.

For Yang Hui's surprise, the introducers here didn't feel redundant at all, if Yang Hui wasn't surprised by this, it would be strange.

"Yes. Our radar performance indicators have surpassed the American APG67 radar in some aspects, after all, the APG67 radar has been developed in 81 years, and under the development of these years, we must also make progress. ”

Hearing this statement, Yang Hui also smiled in his heart, what kind of republic's radar progress, it is almost the same as Israel's support.

Yang Hui is absolutely clear about the ability of Changhong Factory, and he has just completed the Blue Fox radar, which can be regarded as figuring out all aspects of the single-pulse radar.

But to say that within a few years, it will directly break through the single pulse. While the problems of radar downward vision and topographic mapping can also reduce the weight and volume, Yang Hui doesn't believe anything anyway.

However, this time, the 7806 radar was developed with Israel's participation, and the Changhong Factory participated in the whole process. If it can be successful, it can be regarded as a breakthrough in the Changhong factory.

"The performance of this radar is indeed good, and if it can be developed, our FC-17 radar will definitely be it. In this way, let's increase the upper weight limit of the radar by another 10kg. I just hope that you can come up with the finished radar on time, and it must be absolutely reliable. ”

Why did Yang Hui take the initiative to expand the weight limit of the radar by 10kg. This is still because this radar is too big, and Yang Hui is afraid that the reliability of this radar will be bad after using it, and that will be more than worth the loss.

After all, the weight of the APG-67 radar in the United States is 122 kg, and the performance of the 7806 radar is almost the same, and the weight limit of the 7806 radar is limited to less than 100 kg.

Sure enough, after Yang Hui relaxed the weight limit to 110kg, the facial expressions of the radar developers here were greatly relaxed.

I know that the reason why the performance indicators of the 7806 radar are so high is mainly to be able to beat the competition.

As an international joint project, the FC-17 fighter naturally has more choices in the procurement of many subsystems, and because overseas orders for this aircraft will not be produced in the Republic in the future, Yang Hui simply let go of the radar procurement option.

The APG-67 radar from the United States is the biggest threat to the 7806 radar this time, whether it is the Changhong factory that is preparing to return to the first-line radar manufacturing unit of the Republic in this project, or the Israeli side, which is bent on proving its ability after the American father forcibly abolished the Lavi project.

Both sides have always decided to control the performance of the radar at the same level as the APG67 when the weight and volume of the radar are smaller than that of the APG67.

The goal is very ambitious, but in the development is all kinds of troubles, the most important thing is to control the weight of this aspect, to put it mildly, the current 7806 radar, in fact, is to carry out various weight reductions on the EL / M2035 radar, and then reduce weight.

Originally, Israel only completed the finalization of the 2035 radar in 87, which was definitely the use of Israel's most cutting-edge radar technology, and now it is only a year before it is proposed to reduce the weight by 35kg......

It is conceivable that the development of the 7806 radar this time is not very smooth, and now the weight limit of 10kg has been relaxed, which is definitely a major good news.

"No problem, now that the maximum weight has been relaxed to 110kg, we will definitely be able to come up with a reliable 7806 radar on time, and we must have taken the FC-17 radar!"

At this time, the words revealed a strong sense of confidence, in their opinion, the current radar development will not be too much of a problem, as long as there are two more years of development, 90 years can definitely be delivered to the aircraft.

With the confident answer here, Yang Hui also roughly understood the situation, and continued to listen to the follow-up introduction of this radar.

And the follow-up introduction finally made Yang Hui completely relieved that the 7806 radar of the Changhong factory was completely reassured, the reason is simple, the Changhong factory was absolutely attentive when developing this radar.

Whether it is the original Blue Fox radar or El/M2035, these two radars use an honest data exchange method, and many times they are not too easy to use.

As we all know: the antenna of the radar and the signal receiver are installed in the nose radome, and the weight of the radome is far away from the lift center of the fuselage.

This principle is like making a seesaw, and the effect of the same weight close to the fulcrum and close to the ends is a completely different concept. (To be continued.) )