It is said to be a laboratory, but it looks like a "workshelf".

Because the huge laboratory was actually made of simple brick-concrete structures, the decoration inside was made of only quicklime pasted with a layer of white walls. Liu Feng could clearly see the mottled pieces on the surrounding walls. The red bricks and stones exposed after the quicklime were weathered and exposed.

Outside the window, a strong wind blew, and then a buzzing sound came from his ears. Liu Feng looked up at the sound. It was the roof of the laboratory, which was actually paved with aluminum alloy structures similar to roller shutter doors common in rural areas. When a buzzing wind blew, the aluminum alloy on the roof blew, making people wonder if these things would be taken away by the wind.

Is this an academician's laboratory?

Liu Feng couldn't believe his eyes.

"The conditions are a bit simple, which makes Professor Liu laugh." Academician Ma seemed to know Liu Feng's doubts and explained with a smile, "This laboratory used to be a warehouse. Because it was close to our Haizhou University and the land price was cheap, it was bought by the school. However, it has not been developed before. It just so happened that our electromagnetic catapult covers a large area, and I couldn't come up with an experimental building specially used for the placement of catapults, so I simply applied for this old-fashioned warehouse from the school and just made it simple to use it. Fortunately, the construction party was very powerful. After so many years, there were no major problems except for the weathering of the walls."

Liu Feng was so impressed that he was so impressed.

If he hadn't seen it with his own eyes, it would be hard for him to believe that an academician of the national treasure level had created the most advanced aircraft carrier electromagnetic catapult on the earth in such a simple laboratory, although it was just a prototype!

Only such a person can be content with this. He will not care whether the conditions are simple or not. As long as there is a place to let him do the experiment, he will be satisfied. If it were him, he would have been muttering all the time.

Fortunately, in addition to this "laboratory", Academician Ma's other laboratories look quite 'glorious'. Whether it is equipment or environment, that is the treatment that academicians should have. Otherwise, Liu Feng would have doubted whether Academician Ma offended some big shot and was exiled here.

Such talents are actually treated like this, so how can they not let other people feel like they die of rabbits and foxes are sad and hurt their kind?

Shaking his head, Liu Feng no longer cared about the environment here.

In fact, although he is a little vain, he is generally a person like Academician Ma.

Yes, that's right.

Looking up and looking carefully at the overall layout of the laboratory, I found that the laboratory, which was transformed from a warehouse, covers a very large area, as big as two basketball courts. A complete set of complex electromagnetic catapult prototypes, with hundreds of thousands of small and small parts placed inside, and there was still room left around that allowed a heavy truck to pass through.

"Is this the 1:1 unit equipment prototype?" Liu Feng asked, staring at the instruments and equipment that were filled with most of the warehouses.

“Yes,”

Academician Ma nodded and led Liu Feng directly into the gate. Two security personnel around him followed him and walked to a corner of the laboratory.

"Our catapult prototype is mainly composed of two structural modules: power grid and electromagnetic launch device. Now in front of you is the power grid module, which is also a comprehensive power generation system composed of 12 AC DC dual winding generators, which is used to simulate the power supply facilities on warships."

Liu Feng nodded, admiring this set of Academician Ma’s proud works, because with his ability, he could not find any place to ‘deeply process’.

Without causing humiliation, Liu Feng followed Academician Ma to another corner of the laboratory.

"What you see now is the electromagnetic emission device module. It is composed of a closed-loop motion control system, mainly composed of energy storage system, pulse power conversion system and pulse emission device."

"The working principle is simply put, when the entire system starts to work, the energy storage system absorbs and stores energy from the power grid for a long time with a small power; and when the stored energy meets the transmission requirements, once the transmission command is received, it will immediately release energy to the pulse power conversion system; the pulse power conversion system then converts the electric energy released by the energy storage system into the pulse power energy required for the operation of the pulse transmitter, generating electromagnetic force to drive the transmitter movement; finally, the closed-loop motion control system controls the transmission trajectory in real time to ensure that it is accelerated to the set final speed at a predetermined position and completes the transmission task."

While listening to Academician Ma’s introduction, he observed the structural layout of this system, and then used it to verify the technical details he obtained from Academician Ma.

Liu Feng's eyes shone.

It seemed to be inspired, and finally, he nodded.

Speaking of which, the technical bottleneck Academician Ma encountered was not on the power grid and energy storage systems, but on the pulse power conversion system and the pulse transmission device.

In fact, according to the use of electromagnetic catapults, the different lengths and final speeds of the launch tracks, Liu Feng knows that electromagnetic emission technology can be mainly divided into three categories:

One type is the carrier-based catapult used in aircraft carriers. The length of the pulse launcher of the pulse launcher is generally not more than 100 meters, and its final speed can reach 100m/s (360 kilometers/hour). The maximum weight of the catapult can reach 45 tons.

Another type is the electromagnetic railgun technology that Liu Feng saw before, which is mainly used for military electromagnetic guns and near-defense guns. The length of its launch track is generally within 10 meters, the final speed can reach 3km/s (8-9 times the speed of sound), and the mass of its ejected object is generally around 10 to tens of kilograms.

As for the third type of electromagnetic push-out technology, it is more sci-fi, mainly used for the launch of spacecraft. The length of its launch orbit is generally in the level of kilometers, its final velocity can reach 8km/s (the first cosmic velocity), and the ejection mass is generally above ton.

From these three types of electromagnetic emission technologies, we can see that when discussing electromagnetic emission technology in detail, a technical indicator that needs great attention can be summarized here, that is, the acceleration G value!

This is a crucial indicator for electromagnetic catapults!

Because, for ordinary people, acceleration exceeding 3g is unbearable, and even a trained pilot can only temporarily withstand acceleration not exceeding 9g. If it exceeds the limit, it may cause short-term or permanent physical damage or even death.

Therefore, like various equipment, there is a G value limitation. For example, a general civil aviation passenger plane cannot exceed 2.5 g, otherwise there will be a possibility of air disintegration and structural damage.

Even fighter jets have a very limited G value. For example, in the initial design, the maximum structural acceleration value that the F35 can withstand does not exceed 6.5G.

In the field of electromagnetic emission, since it can achieve a fairly stable acceleration process, its emission process can be approximately simplified to a zero initial velocity uniform acceleration process in Newtonian mechanics.

According to the corresponding motion formula, the acceleration required during the emission process is actually only affected by the length of the emission track S and the final velocity V. To be more precise, its acceleration is opposite to the length of the track (the longer the track, the smaller the required acceleration); it is proportional to half of the average value of the final velocity (final velocity) (the larger the required final velocity, the greater the required acceleration, and the flattening method is increased).

From this we can see that the acceleration of electromagnetic catapults for aircraft carriers must be less than 6G, while the acceleration of electromagnetic guns and near-defense guns can reach more than 45,000G!

Therefore, compared with steam catapults, electromagnetic catapults are actually very stable, adjustable, and have a lower G value, which is definitely its most prominent advantage;

However, success and failure are the same, stable and adjustable, but the lower G value will definitely test the catapult's design indicators and science fiction level.

On the one hand, a lower G value is required, while on the other hand, a short instantaneous speed is required, which is a great test for the pulse power conversion system and the pulse transmitting device. This is the biggest bottleneck that Academician Ma has never been able to solve!

However, for Liu Feng, he had already thought of two ways to improve these problems. Of course, it is not certain whether it can succeed in the end. He still needs to be more familiar with these devices and be able to simulate the operation of the devices in his mind.

But at present, he is at least 80% sure.

As time passed, the two of them stayed in the laboratory for several hours. Finally, before it was getting late, Liu Feng smiled confidently:

"Academician Ma, I heard that Country M is building the latest Ford-class aircraft carrier, which also uses electromagnetic catapults; for MG's electric bullet equipment, do you know how they solve these problems?"

Academician Ma looked contemptuous and was simply disdainful of the so-called electric bullet equipment of M Governor:

"It's not me, Ma, who boasted. Even my 1:1 prototype is more than twice as advanced as the electromagnetic catapult indicators they announced!"

"Oh?" Liu Feng stretched his neck and listened with ease.

"Although I don't know where they got such confidence, they dared to announce that they would abandon their mature steam catapults on the Ford aircraft carrier and switch to immature electric bullets, but in my opinion, in addition to pursuing high-tech, there must be many ulterior motive secrets here, among which, the biggest possibility is to defraud funds from their Congress."

“And, as far as I know, their catapults are facing much more problems now than ours.

Experts look at the tricks and laymen watch the excitement. I have summarized 4 major issues here.

First of all, the people of M seriously underestimated the workload and maintenance load brought by electric bullets to the aircraft carrier! For this reason, not long ago, I heard that their Ford aircraft carrier changed its original design and expanded its related space due to the electromagnetic catapult, and struggled for a long time!

Secondly, it is the issue of catapult stress: the original design indicators of Chinese people, and they felt that the use of electromagnetic catapult should effectively reduce the structural stress load during the aircraft's catapult (i.e. the g value discussed in the previous article), but in actual land tests, the main structural stress load of the F/A-18 carrier-based aircraft has increased.

Next is the independent maintenance of electric bullets: their electric bullet maintenance design method is very problematic. Not long ago, the M Navy discovered that their Ford aircraft carrier design cannot isolate a catapult for independent maintenance, which seriously reduces the reliability and operational capabilities of the system.

Finally, there is the reliability issue: the current failure rate of our prototype is one in 200, which means that there will be a problem once in 200 ejections. However, the electric bullet data released by the people of M is one in 100, and there will be a failure once in 100 ejections. It is still far from the 4166 targets it designed!

Of course, most of these are the data they published. After confirmation by our people, it may be quite different from the facts, but it will not be much different."

Listening to Academician Ma's confident and disdainful tone, Liu Feng suddenly remembered a sentence

——"To lead the country M!"

This is a sentence Academician Ma said when he was successfully developed in the comprehensive power system.

Confident and domineering!

I'm afraid that only such a national treasure-level scientist can say such words!

Academician Ma's efforts and talent in scientific research have been well known to the most cutting-edge research on both sides of the enemy and us. It is admirable and fascinating.

Although Liu Feng thought he could do it, even better than Academician Ma, Academician Ma did not have plug-ins!

Without cheats, you can overtake like cheating. In addition to Academician Ma, only a few scientists from the older generation occasionally appear... Liu Feng has always admired such people from the bottom of his heart.

"It seems that we are creating an unprecedented record," Liu Feng was also proud of himself. "The second generation catapult system of the aircraft carrier - the electromagnetic catapult, will eventually be led by our country!"

"It seems that Professor Liu is very confident!" Academician Ma said with a smile.

"Of course, how can I let Academician Ma down?" Liu Feng also smiled, "Then, let me throw my bricks and tell me what I think."

So, Liu Feng explained his thoughts in detail, and Academician Ma also listened to Liu Feng's narration carefully, his face full of expectations.

The sun sets in the west and the night is getting darker, but neither of them seems to have noticed the passage of time. In the small office next to the laboratory, discussions are heard one after another and never stop.

The staff who were driven out of the door by the two professors looked at the closed door and waited from afternoon to evening, and then waited from evening to late at night. Then they shook their heads helplessly and left each.

Only Geng Tang, who was following Liu Feng and the security guard next to Academician Ma, were waiting outside the door.

Seeing the two big shots who had never left the office, Geng Tang said worriedly: "Old Wei, you said that these two people stayed in there for a long time and didn't eat or drink, so nothing should happen, right?"

Speaking of which, he and the one next to Academician Ma are also colleagues, but the different numbers of the system are similar in their work. Therefore, while waiting outside the door, the two have already formed a relationship.

The comrade named Lao Wei seemed to be one hundred years older than Geng Tang, and had a lot of experience. He had experienced this kind of thing more than once. He smiled and encouraged him, "How about you go in and take a look?"

Geng Tang hesitated for a while, walked to the door and was about to knock on the door, but suddenly remembered something and turned around: "But why don't you go?"

Old Wei smiled: "Because I'm afraid!"

Geng Tang also smiled: "Scared? What's there to be afraid of?"

Lao Wei: "I'm afraid I will become the eternal sinner of our country!"

Geng Tang: "..."

Three words suddenly flashed through my mind - a cheating father!
Chapter completed!