The discussion continued until the rest of the group went to work, and the designers, who had not slept all night, washed their faces and went back to their posts.

For them, it is very normal for them to stay up late and continue to work without resting in this mountain.

As the quote says: 10,000 years is too long, seize the day!

The republic finally ended the turmoil, and they finally had the opportunity to apply what they had learned in their lives to contribute to the national defense of the motherland, so they naturally had to recover those lost time. This group of them, that's it, they can give up everything for the sake of the country.

All because they hope to have a strong motherland, and hope that under the protection of the motherland's strong national defense forces, they will no longer be bullied by the great powers!

From 1840, when the British giant ships and cannons bombarded the country of the rotten Manchu government, to the founding of New China, a total of one hundred and nine years, the entire land of China was plunged into turmoil, many patriots wanted to develop the national defense industry, but without the support of the state, in the end everything became a bubble, the country is still weak, a small island country can actually bring more than ten years of deep disasters to China!

All this is due to the fact that the country does not have a strong defense industry.

At present, the state strongly supports the development of the cutting-edge defense industry, and they naturally cannot give up such an opportunity.

Tanks, as long as they are made, the pressure on the northern border will be much lower. Because the tanks of the republics were a whole generation worse than the Soviet ones, and they were even more insufficient in number! Once the Soviets start attacking, their torrent of steel will easily crush the capital of the republic!

Liu Yijiu is the same. Discuss all night in the evening, although the body is very tired. The mental state is not too bad.

The modification plan of the 59 tank has been completely finalized, and there is no need to do technical demonstration or anything. They have set up these projects on their own, and this can be avoided completely. Of course, if Liu Yijiu was not very confident in the realization of these above technologies, he would not have failed to do technical demonstrations.

Otherwise, when the tank prototype is made in the future, it will fall apart after firing a shot, and this joke will be big.

Unscrewed the faucet in the sink outside the office of the ninth district, washed his face with water in his hand, and the whole person was in a lot of energy, Liu Yijiu went to the production workshop of the tank gun research with Yu Mingjiang, the person in charge of the fire control system design with a tired face.

Since last year. Work is underway to upgrade the 59 tank gun from the 100 mm tank gun to the 105 mm rifled gun.

Don't look at the caliber is only an increase of five millimeters, but for a republic with a weak foundation, the difficulties in this are definitely not small. What's more, the development of a 120-mm 50-caliber barrel was also underway.

The 50-caliber tank gun of the 120 smoothbore gun is mainly composed of a smoothbore barrel, a wedge-type gun tail and a bolt, a barrel-shaped cradle, a throttle rod-type anti-recoil device, and a body tube thermal sheath. The total weight of the gun was 2600 kg. Its structure is simple and compact, reliable and easy to use and operate. In order to speed up the work, Liu Yijiu stayed up all night to draw these drawings after the new cannon steel provided by Liu Yijiu for the production process and raw material formula was manufactured on a small scale.

He had studied these before, and he still had a deep memory of the drawings.

Of course, there are some non-critical points, which he often doesn't pay much attention to. This requires researchers to match......

Originally, most of the people in the base were inclined to use 125-mm smoothbore guns, after all, the Soviet-style standard has always been used in China, and now they have T64 and T72 in their hands. All of them are 125 mm smoothbore guns, so they are naturally inclined to this scheme.

Liu Yijiu knew that the Republic was about to introduce 105-mm rifled guns in Britain. So, at a time when the whole world began to use smoothbore guns. He had to waste money and his own energy to get this out. the whole world, for many years to come. Only British tanks were armed with 105 rifled guns. How many tanks did the entire British country equip with? And the entire NATO standard is a 120-mm smoothbore gun, and if you want to export to NATO countries, you must make the ammunition of tank guns universal! The Warsaw Pact countries were simply too poor.

The power of 125 is not much greater than that of 120.

The smoothbore gun, which was developed in the mid-nineties by the Republic of China from foreign technical standards, was able to penetrate most of the third-generation tanks equipped by countries around the world in the early 21st century at a range of 2,000 meters! And Liu Yijiu appeared, so the Leopard 2 and M1A2 that could not be penetrated, this was impossible!

The shape of the 120mm tank gun made by the Ninth Courtyard is similar to that of the Type 59 100mm tank gun and the Type 83 105mm tank gun (this thing was imported from the United Kingdom) that will only appear in a few years, and the mass is comparable, and the interface size is the same as that of the turret and other parts, but it has more power!

"Director Liu, Mr. Yu, didn't sleep last night?" Seeing the bloodshot eyes of the two people, Chen Yang, a tank gun designer who was fiddling with a group of technicians who were fiddling with a model gun made of wood, asked in surprise. "The body is the capital of leather & life!"

"It's okay, last night was mainly to discuss the assembly design plan of the 59 reform project. How's it going on your side? Haven't started the sample production yet? Liu Yijiu nodded and said indifferently.

"Now that we are starting to prepare materials, Director Liu, are there really no problems with these design schemes? Especially the self-tightening process of the barrel, we have never been in contact, this caliber has increased by 20 mm, the weight has not increased, we always have no bottom in our hearts......" Chen Yang said with a wry smile.

The whole gun adopts a new design concept, and even the process of self-tightening of the gun body that they have only heard of has been adopted, without more demonstration, Liu Yijiu asked them to supplement the design of some non-key parts, and then directly let the production process of the sample gun be formulated......

This kind of thing is really scary.

"No problem, haven't you all been working on this wooden model for a long time, and all kinds of data are constantly being simulated and calculated? You don't even believe the calculations, do you? Engage in technology research and development, full of skepticism, this is necessary, but you have to experiment more boldly......" Liu Yijiu looked at the wooden model, and was a little depressed.

Without advanced computers and 3D simulation software, if you want to analyze the structure from the overall design and carry out various strength calculations, you can only use wood to make models......

"What's more, this is not something that will be used directly after it is produced, and it has to have all kinds of experiments and tests!" Liu Yijiu's words made Chen Yang and others have a bottom in their hearts.

Liu Yijiu's magic, they all know, as he said, there is a real problem, and in the end, it will be solved during the experiment. If you don't produce samples, you'll never be able to find a problem, let alone talk about improvements.

"It's going to cost money!" They have all come from hard years, Yu Yang said with some heartache.

The Republic has never wasted many experiments in its experiments.

It's a miracle in the whole world. Just because the republic is poor!

Dongfeng 2, failed only once, and succeeded!

"Money is not an issue! You only need to be responsible for all kinds of technical research, and if you can't save it, you can't save it! Liu Yijiu emphasized again.

The Republic is always that kind of thrifty mentality, so that the technology research and development is very conservative, many designs, are the use of mature technology and design schemes, will eventually cause greater waste. At the same time, it also restricts the designer's mind.

The Z-7 is the best example of this.

Now Liu Yijiu must correct this problem from the beginning, and the money that should be wasted must not be saved! Failure to do so will result in even greater waste.

Only by failing can we achieve greater success.

The Soviets invested heavily in weapons development, while the Americans were even more coquettish, and basically all kinds of weapons were piled up with money. Therefore, their weapons and equipment are developing very quickly. It was not until the second decade of the 21st century had passed, when the republic had money in hand and vigorously used it to smash weapons and equipment technology, that it realized this problem.

"Isn't there a need for our 105 guns? It's a bit of a waste to get two guns at the same time...... "The problem of funding for the base is not something they consider, but the province's really has to be saved."

Therefore, Yu Mingjiang also felt that it was another 105 gun, another 120 gun, and even a third 125 gun design scheme......

The caliber is about the same, and the power is not much different, so it's really unnecessary.

"No, it has to be! Rifled guns and smoothbore guns are two different guns, if we can make our 105 rifled guns reach the power of naval guns, wouldn't it make our tanks have more powerful attack power? Although Liu Yijiu knew that two kilometers away, it was basically the range of artillery, but in order to save the country a sum of foreign exchange for the introduction of this kind of artillery from Britain, he had to get it.

Even if it's useless, it's good to use it as a technical reserve.

Although his reasons were far-fetched, Yu Mingjiang didn't say anything more.

The plan made at the beginning was like this, tentatively named the new tank project of the 59 change, to produce two prototypes, one with a 105 rifled gun on it, a smoothbore gun with 120 on it, and possibly even a 125 smoothbore gun, after all, considering the war with the USSR on the northern border, it could be replenished with captured ammunition......

"The chrome plating process inside the barrel, which needs to be carefully studied, can effectively improve the stability of the ballistic performance of the gun during the life of the barrel, so that the gun will always maintain the same ballistic performance and shooting accuracy before the end of the barrel life...... The inner chamber of the barrel is chrome-plated, which is also convenient for maintenance and improves the anti-corrosion performance...... "Liu Yijiu doesn't understand the technology of chrome plating inside the barrel, anyway, just explain this."

At that time, there will naturally be a surface treatment technician in the second area to cooperate. (To be continued......)