In the military industry that year, the cloud bombs started to wash the ground for monkeys

Active radar guidance is different from other guidance methods.

Inertial guidance is controlled by mechanical instruments such as mechanical gyroscopes, and the accuracy is not high.

Infrared guidance also does not require too much electronic equipment, so there is not much heat dissipation problem.

Active radar guidance is different.

There are micro-chipsets for instruction analysis and data analysis and processing inside, as well as various electronic components such as power supplies.

This is equivalent to a computer that processes various data, and the heat emitted is actually very large.

The heat dissipation is large, plus the large amount of heat generated by the friction between the missile and the air when flying at high speed.

It will quickly destroy the internal electronic system 803 in a high temperature state, and completely lose control of the missile.

This is also the key reason why the imitation Phoenix air-to-air missile has an effective range of only 70 kilometers.

"Using more advanced chips can indeed increase the ability to process data and lower the temperature."

"But the reduced temperature is useless at all. How to dissipate heat better is the key."

Lu Xuan memorized this problem and couldn't think of a better solution for a moment.

"Are there any other questions?" Lu Xuan asked.

"After installing a ramjet engine and improving natural fuel technology."

"The theoretical cruising speed can definitely exceed Mach 3."

"But the faster the speed, the more heat is generated."

"It's still a cooling problem..."

Lu Xuan was speechless, Wang Mingyi was just obsessed with the cooling problem and didn't let go.

"If the temperature is controlled within a safe range, how much will the performance be reduced?" Lu Xuan had to ask in another way.

"At least half the speed, and the speed will not exceed Mach 2, but the hit rate has been greatly improved." Wang Mingyi said, pointing to the simulated data on the monitor.

"Has the active radar part of the control system been developed?" Lu Xuan asked.

"Every sample has been produced, only the assembly is left, and the temperature is still very high..."

Lu Xuan immediately vomited blood. Apart from heat dissipation, doesn't this old guy have other problems?

Lu Xuan can only solve the heat dissipation problem first.

Electronics, especially computer chips.

As long as the amount of calculation is too large, a huge amount of heat will be generated.

Many solutions are to use heat sinks or cooling fans to dissipate heat.

But inside the missile, even heat sinks and cooling fans are not enough.

Because the high temperature generated by the friction between the missile and the air will be instantly transmitted to the internal radar guidance chip.

Coming to the testing room, Lu Xuan saw several active radar seekers that had been completed.

These seekers are now all powered on for testing, and the indicator lights on the seekers are constantly flashing.

"The temperature is so high without the outer casing?" Looking at the data from the test, Lu Xuan frowned even tighter.

"It will exceed 70 degrees within three seconds of starting up, and it will only get higher and higher in the future until the chip is completely burned."

"What if a 32-bit chip is used?"

Lu Xuan never thought about active radar guidance.

The first half is guided by the fighter plane or the ground control system for radar guidance.

It can be realized without too much complicated data processing.

But in fact, the difficulties faced are so high.

"It's useless. Using a 32-bit chip can lower the temperature a lot, but it's still not enough." Wang Mingyi said helplessly.

"How about making the cooling holes of the guidance system bigger?" Lu Xuan asked.

"We have also experimented with this plan, and it will affect the flight attitude of the missile."

The internal electronic components and power supplies of advanced radar guidance systems generate a lot of heat.

The heat in the missile guide compartment must be dissipated through the cooling holes.

However, if the cooling holes are opened too large, too strong airflow (accc) will also affect the guidance accuracy.

"What if liquid nitrogen is used?"

Lu Xuan suddenly remembered something with an ultra-low melting point.

If this thing touches human skin for two seconds, it will cause irreversible frostbite.

"Liquid nitrogen?"

Receiving Lu Xuan's reminder, Wang Mingyi's eyes lit up.

He really never thought of using this thing to cool down and dissipate heat.

"Yes, just use liquid nitrogen, calculated according to the speed of the missile at Mach 3."

"It takes more than 100 seconds from launch to maximum range."

"The ultra-low temperature characteristics of liquid nitrogen should be feasible..."

Lu Xuan's brain was running fast, calculating the feasibility of this plan.

After Lu Xuan proposed the plan of using liquid nitrogen to dissipate heat inside the guidance cabin.

A group of technical experts immediately started the technical demonstration and joined the supercomputer for simulation.

The results obtained made everyone very excited.

"Director Lu, I really didn't expect the effect of liquid nitrogen to be so good."

"We keep thinking about cooling with heat sinks or fans, but we ignore other physical cooling methods."

"Although it adds some weight, it is negligible compared to the heat dissipation effect."

"Hey, maybe ours is old and our thinking is rigid, or Director Lu is young and his brain is alive!"

For the experts' praise, Lu Lu felt very helpless.

Sometimes the solution to a problem is actually quite simple.

It's just that they didn't think of that.

After computer simulations, experimental tests were carried out.

The heat dissipation effect of liquid nitrogen is beyond imagination, and it is easy to implement.

A few loops of tubing filled with liquid nitrogen directly around the electronics will do the trick.

After the heat dissipation problem is solved, there will be no major technical problems in the improvement and development of the entire missile.

"The next step is to conduct a live ammunition target test to ensure the accuracy while ensuring the range and speed."

Lu Xuan directly ordered the improvement and target testing of the three missiles.

Combat beyond visual range relies on high technology and the performance of missiles.

"Let's test the Red Flag air-to-air missile first."

"Air-to-air missiles are much more technically difficult."

"As long as there is no problem with the testing of the air-to-air missile."

"There is no problem with Hongqi surface-to-air missiles and Hongqi surface-to-surface missiles."

Wang Mingyi suggested to Lu Xuan.

"Then quickly get out the Hongqi air-to-air missiles, and use the Jian 7 or Jian 8 fighters for target shooting tests."

Wu Qiming couldn't wait to see the performance of the Hongqi air-to-air missile.

After all, the imitation Phoenix air-to-air missile is amazing enough on the battlefield of the Persian Lion.

The improved Hongqi air-to-air missile can only be better.

However, Lu Xuan agreed with Wang Mingyi's proposal, but rejected Wu Qiming's proposal.

"Since the most complex air-to-air missile test has been chosen."

"We just have to maintain the highest standards, the highest demands."

"The maneuverability of the sword 7 and sword 8 fighters is obviously not good, we use the sword 9 to test.".

170 The embarrassment of having super powerful missiles but no target drone

There is a ramjet that solves the material problem.

With the experience of imitating Phoenix missiles.

With advanced technical reserves.

Solved the heat dissipation problem of the radar guidance system.

The Hongqi air-to-air missile with a speed exceeding Mach 3 and a range of more than 200 kilometers was quickly trial-produced.

Then "grabbed" a sword 9-fighter from the hands of the Persian lion.

And mounted the Hongqi air-to-air missile on the Jian 9 fighter.

Test pilot Zhou Qing will once again drive the Jian 9 to perform target shooting tests.

The location is still at the artillery testing ground of the Shudu Military Region.

Today's weather is fine, sunny, cloudless.

Early in the morning, a large group of people came to the experimental field.

Including Zhang Linsheng, Commander of the Shudu Military Region, Xia Zhentao, Commander of the Air Force Department, Zhao Xingguo, Chief of the General Staff, and Wu Qiming, Director of the Science and Technology Commission

Of course, Director Lu, Yang Changgen and other leaders of the 618 base and relevant experts also came here.

Everything is ready, and everyone is looking forward to seeing how the Hongqi air-to-air missile performs.

At this moment, Wang Mingyi trotted over with a look of embarrassment.

"Director Lu, I'm afraid we won't be able to test the performance of the Hongqi air-to-air missile today..."

Hearing this, everyone looked over with puzzled expressions.

The missiles have all been trial-produced, and the performance cannot be tested?

What kind of international joke are you making?

Seeing that everyone's faces were not looking good, Wang Mingyi quickly explained: "It's not our problem."

"The target drone sent by 352 has been calculated by us, and it is far from our requirements."

"The theoretical speed of our Red Flag air-to-air missile exceeds Mach 3."

"The unmanned target drone sent by 352 has a maximum speed of Mach 1.7."

"And it's even more unsatisfactory in terms of mobility and the ability to release interference..."

Lu Xuan almost spat out a mouthful of old blood.

What the hell is this?

The bosses frowned when they heard this.

Director Xiao Yuan of Institute 352 blushed and said:

"At present, there is only one unmanned target drone we have in our country."

"It was also the La-60 unmanned target drone Changkong that we imitated Maoxiong in the 17s."

"This kind of target aircraft is completely no problem for other domestic missile and air defense exercises."

"But for the high speed and performance of the Hongqi air-to-air missile, our Changkong is too far behind..."

Zhao Xingguo immediately became angry: "Director Xiao, didn't the Air Force long ago propose to develop an unmanned target drone with high-speed level and high maneuverability? How come there is only Changkong in reality?"

Although the 352nd Institute is not under the jurisdiction of the General Staff of the Army, Zhao Xingguo is the chief minister after all.