Neune looked at the documents clearly marked on the computer screen on how to increase the range and how to operate the rocket anti-ship, and for a while he didn't know how to evaluate it.

In fact, not to mention him, even Zhang Hongyin was a little stunned when he saw this plan for the first time.

The launch dynamics of rockets, especially those with a large aspect ratio, is an extremely complex subject, and long-range ballistic weapons with a range of more than 300 kilometers such as the Defender 2 have to go through multiple temperature layers with completely different environmental conditions throughout the flight.

Asking customers to change the design of the bomb body on their own can easily make the already inexpensive ballistic computer even worse.

In particular, extending the range of ballistic weapons is by no means a solution that can be solved by stuffing more fuel.

If you mess around with the structure of the rocket, it will be completely inaccurate to fly around after launching, or it will disintegrate on its own before hitting the target.

At that time, the Iraqis took two Scuds and put them together to assemble a ballistic missile with a longer range, but after launching, almost none of them landed normally, and all of them were finally included in the Patriot's interception "results".

However, Rui Xiaoting said very confidently that he had completely taken into account the issue of launch dynamics, and the new missile body after replacing the seeker could share the firing table data with the prototype projectile, plus the final stage could also rely on active radar guidance to adjust the flight attitude, and the accuracy of hitting a frigate dozens of meters long could still be guaranteed.

As for the extended-range version, no changes were made to the body itself, but the maximum range was extended thanks to the correction of the parameters of the solid rocket engine.

In short, Rui Xiaoting quickly persuaded the apprehensive Zhang Hongyin with professional and accurate calculation results.

Of course, the customer does not understand the technology, and the detailed design data is a trade secret and cannot be fully disclosed, so it can only rely on test firing to speak.

But that's not all.

The PPT on the computer screen quickly turned to the back page.

"In addition to the existing three modes of ammunition, we also plan to produce supporting UAVs for the Guardian 2 rocket system, which can be directly loaded into the launch box, through booster rocket launch, interception net recovery, artillery reconnaissance and meteorological observation missions if necessary, as well as a co-launched, larger-caliber ballistic missile ......"

If Rui Xiaoting had learned anything other than the use of TORCH Multiphysics at Jinghang University, it must be Chang Haonan's painting skills.

Whether it is these drones or ballistic missiles just mentioned, it is too much to say that it is a plan, but in fact it is just the content of the brainstorming between him and Zhang Hongyin on the way to the shooting range.

After all, in the current year, there are few serious UAVs in the entire Chinese army, and the domestic aviation field is still close to blank in this regard.

This is not a problem that those of them who are engaged in the arms industry can solve.

However, Neune on the other side obviously didn't know this, and thought that these were also very mature technical solutions like the previous parts, so he asked a lot of details.

Fortunately, half an hour was not long, and before Rui Xiaoting could not make it up completely, it was time to conduct the launch test.

On the monitor not far away, the 6*6 launch vehicle was speeding on a dirt road, and after a few turns, it stopped at the preset launch position, and then slowly lowered the support frame.

"Because of the upgrade of the fire control computer, so there is no need to wait until after entering the launch position to calibrate the shooting elements, just now I have preset the coordinate data of the target in the preparation area, and now I only need to call it out, which greatly speeds up the reaction speed from entering the position to launching......

Zhang Hongyin explained beside him.

As soon as he finished speaking, with a puff of dust, the first rocket broke through the seal in front of the directional tube and shot out like an off-string arrow.

This was followed by the second and third......

"Compared with the previous generation, we have modified the design of the frame, hydraulic mechanism and directional tubes, and the firing interval between each two rounds has been shortened to less than 2 seconds, and the fire density is more guaranteed."

As he spoke, all six rockets had been fired, the support frame of the launch vehicle was raised, and then the launch position was withdrawn as quickly as possible.

The whole process probably lasted less than four minutes.

"The shorter the time from entering the position to withdrawing from it, the less dangerous it is for the firing unit, and our survivability can be about four times higher than the 10-15 minute transfer time for most artillery units."

"Of course, with the range of Defender 2, there aren't too many weapons that can threaten it......"

By this time, Neune's eyes were different from the beginning.

Although there has been no movement on the target area, he has already made up his mind that as long as the accuracy of the final hit is not too outrageous, this order must be placed.

After a long wait.

In another camera, six successive flashes of fire covered the entire target point with white circles......

"Bang!"

Neune directly smashed the table excitedly:

"Two, I'd like to take a look at your factory."

……

Chang Haonan, who was far away in the capital, naturally didn't know that Rui Xiaoting had already played Guardian 2 after getting his software.

After sending the design plan of the Air Police 200 to the Fucheng Wind Tunnel, he naturally put his main energy back to the aero engine.

The fact that compressors and turbine experimental installations have not yet been put into use does not mean that research is completely impossible.

During this period of time, Chang Haonan got the vast amount of aviation development data from the Commission of Science and Technology from the Commission of Science and Technology since the 80s.

Especially fault and accident data.

From the feedback of the use of aero engines such as turbojet 7/13, Spey MK202 and other models, including civilian models, the main pain points are not only the fluid dynamics design that has been more concerned, but also many problems in mechanical manufacturing and mechanical design.

For example, he found that among all the engine components caused by the air shutdown accidents, only the front fulcrum (three fulcrum) bearings of the spindle high-pressure rotor and the fulcrum (four fulcrum) bearings of the LPT shaft accounted for nearly 40%, which is the most important problem affecting flight safety.

In the maintenance data of Hangfa, it is also common to see the replacement records of these two parts.

Taking the turbojet 14 that has just been put into use as an example, the whole life cycle theoretically needs to replace 3-4 times of three-point ball bearings, and for the Spey MK202 with a longer service life of the whole aircraft, the number of replacements will reach 6-7 times, which adds a considerable amount of workload to the ground crew and seriously affects the completeness rate of the aircraft.

At the root of the fact, in the take-off, climb, cruise, landing and other stages of the aircraft flight cycle, the load, speed and other working parameters of the rotor system change continuously with the flight envelope of the engine, and the typical service conditions are high speed, heavy load, high temperature, etc. During flight, the aero engine is affected by short-term transient working conditions such as surge and rotor unbalance, resulting in the two bearings involving high-pressure rotor support often have to withstand the test of extreme working conditions such as variable speed, variable load, overrotation, oil cut-off, and spent oil, and often have early failure and benign contact fatigue failure of subsurface origin.

As for the solution......

Considering that even engines like the CFM56 suffer from bearing failures, it is certainly not enough to replace them with better materials.

It is also necessary to carry out the analysis of the three-point contact state in the main bearing area, the hoop stress of the inner ring and the performance analysis of the cage under the high-speed working condition, the lubrication state and the temperature field analysis for the typical service conditions of the aero engine, and realize the parameter optimization and surface fatigue and damage resistance design of the bearing by calculating the correlation between the change of working conditions and the structural parameters and the performance of the bearing.

And this happens to be the part that Chang Haonan is going to focus on next.

Because this technology is also crucial for a heavy-duty die forging press project that may soon be launched.

"Then let's start with you......"

Chang Haonan put down the statistical form he had just made in his hand, picked up the earpiece of the red landline from the table, and dialed Ding Gaoheng.

(End of chapter)