Super military empire

From a long time ago, Liu Yijiu began to transform the tank gun.

The most important thing is gun steel.

A new type of gun steel, but also a new type of gun steel with rare earth elements.In order to get this material out faster, Liu Yijiu did everything from the recipe to the craftsmanship.Therefore, it is so easy to make a tank gun.

To ask what is the most powerful thing about the Republic, it is estimated that after the 21st century, people in the whole world will know that Shanzhai!

Because the Republic is powerful in copycats, the entire country has become a super manufacturing power in a short period of time.Of course, manufacturing powers are not the same as manufacturing powers, and there is basically no comparison between the two.

However, at present, this kind of copycat ability is very important for the military industry of the Republic, such as Lao Maozi’s t64 and their t72. The tank guns of these two tanks are the same, they are both 125mm smoothbore guns. , It's just that the times are different.

Liu Yijiu did not follow them, but made his own design. It uses a Western-style 120 tank gun with a 45-caliber diameter. The length of the entire barrel reached 5.4 meters.This is a weird thing in this era, especially for medium tanks.The length of the entire tank is 6.3 meters, the width is 3.4 meters, and the height is 2.25 meters. The barrel length reaches 5.4. According to the layout of the turret, the barrel looks much longer than a normal tank.

Most of the tanks of the Fifty and Nine Modifications use 39 or 42 diameter barrel lengths.

If it weren't for the processing technology, it would be very difficult after the barrel length was increased. He even wanted to get a barrel length of 55 times the diameter.

As we all know, the longer the barrel, the higher the accuracy of the shell and the farther the range.

"Director Liu, are you here?" Chen Yang did not expect that when he arrived at the base of the Ninth Academy, Liu Yijiu directly asked him to take over the tank gun project from Yu Mingjiang.

All Yu Mingjiang's energy is now put on the fire control system and gun stabilization system.

"I have already contacted the Rongcheng Military Region, and I hope they can arrange for our tank guns to be tested in the last few days. At the same time, I will also be responsible for conducting actual tests on our artillery radar..." Liu Yijiu Nodded.

Tank guns have been engaged for quite a while.

They need to test not only the entire system of tank guns, but more importantly the performance and service life of these tank guns.

Anyway, this time, a thousand rounds of shells were prepared to test the service life of their new gun steel.

The new gun steel samples given to the Americans did not contain rare earths.

For my own use, rare earth elements are added.

"Let's start live ammunition testing now? Isn't it too early? Now we have only produced three qualified barrels..." Jiang Ming frowned and asked Liu Yijiu."Our gun uses a lot of new technology, and for the old Maozi's gun, the technology is not well understood. Will we carry out theoretical verification and static testing for a period of time?"

"No, isn't there any problem with our theoretical verification? These cannons must be tested as soon as possible. Pakistanis are pressing hard now..." Liu Yijiu stroked the unpainted metal fort on the workbench, feeling cold From the palm of the hand directly to the bottom of my heart

This thing can only be tested for its true performance on the battlefield.

He thinks that he has drawn a picture from his memory, and it is no problem after his own modification.These tank guns adopted the self-tightening process of the gun body, and the small details of the gun hoop were improved.The thickness of the chrome-plated layer of the entire inner chamber is also increased a lot.

The only thing is that the production efficiency is too low.

But these are not problems. After all, they don't have much production capacity here, and they are not specialized artillery factories.

There is no additional barrel on the turret, and the automatic loading mechanism below is not hidden. A circle of upright shells is arranged circularly under the entire turret. The entire mechanism not only has hydraulic control, but can also cause problems in hydraulic control. When using mechanical control, but the design speed of the tank will drop a lot at that time.

"Director Liu, your design is really amazing! If on the battlefield, our troops will win the war because they have a faster shooting speed and higher accuracy than the enemy!" The Pakistani military sent it. The tank gun expert Mohamed Taka Ax, who came here to cooperate and learn, almost every time I see Liu Yijiu, he does not hesitate to praise this tank gun that has not yet undergone shooting experiments.

Pakistan simply cannot design and produce a cannon barrel with a barrel length of more than 40 times.

Long-barreled tank guns with more than forty times the caliber are all cannons, and now there are not too many countries using 45-times long-barreled tank guns.

There are only the United States and the Soviet Union.

Liu Yijiu smiled and nodded. He was really immune to this guy's compliments.

"Forty-five times the length of the barrel, -8°~~+20° high and low shooting range, 360° shooting range, it is really perfect, especially the rate of fire of 8 to 10 rounds per minute. Third, knowing that we have such a tank, I don’t know if they will cry..." The compliment continued, Liu Yijiu still had a smile on his face, even though he was upset, he could only endure silently. Complimentary words.

"Aix, these guns have not been fired on the spot yet, and the specific performance is unknown..." Jiang Ming smiled bitterly and looked at Liu Yijiu, who was enjoying his face, and said to this fifty-something old man from Pakistan. .

"Isn’t it said that the shooting experiment will be carried out soon? I am looking forward to it. Especially the installation of such a cannon on the medium tank is really creative. If it is put on the Kashmir Plateau, it will form a torrent of iron and steel. All the invading troops were driven out of our country..." The old man became more excited as he said.

At the end, Liu Yijiu could only shake his head helplessly.

If it weren't for God's sake, he would definitely just lift a cannonball to block his mouth.

This guy is a typical war fanatic.

"There is no problem with the various theoretical tests of this gun? During the bombardment test, all three barrels were brought on. The fourth one should be coming out soon, right?" The barrels produced in the base are really too slow.

Due to the improvement of the process and the experimental production, the barrels produced before are basically one for each batch.

The barrel of a tank gun is not a whole.

Even with a very strong deep hole processing technology, it is impossible to process a barrel that is five or six meters or more long at one time.

Of course, the most important thing is to consider the processing cost.

Since then, the self-tightening process of the gun body appeared when the requirements for the chamber pressure of the smoothbore gun became higher and higher.

The barrel processing technology does not seem to be very complicated, because it just processes an outer circle and an inner hole, and nothing else.

However, the inner hole is only 120 mm in diameter, but it is several meters long. The lathe can't process it at all, because the longer the tool bar extends, the worse the rigidity will be. During the cutting process, the tool will give way.Therefore, the broaching machine, which originally belongs to the finishing category, can only be used directly after casting to perform broaching. As a result, the processing time is longer and the cost is higher.

The resulting production cost is beyond ordinary people's imagination.

These things all seem very simple.

However, these detailed issues have a very high impact on the performance of the entire tank gun. The ejection speed of the shells, the first shot hit rate and the range, etc., all have a very high impact on the processing quality.

It becomes a requirement that the inner wall of the barrel must be very smooth and wear-resistant, otherwise, the service life of the barrel will be affected.

The tank guns of European and American countries have a lifespan of 500 to 1,000 rounds. If they exceed 600 rounds, the accuracy will be much lower.

The Soviet tank gun has a lifespan of basically 300 rounds. After 300 rounds, the accuracy is reduced, and when it reaches 500 rounds, it will be completely scrapped.

The technology of the Republic comes from the Soviet Union, so this is also a flaw in the Republic.

Liu Yijiu knew this problem, so he was so concerned about it.Whether it can solve the problems of the Republic that have plagued the next decades depends on the actual use of these barrels.According to the design theory, a 45-diameter tank gun produced from a new type of gun steel with rare earth elements can have a service life of more than one thousand rounds.The accuracy will gradually decrease at around 800 rounds, and after 1,200 rounds, the barrel is basically scrapped.

Of course, if all the tail fins are used to stabilize the shelling armor-piercing projectile, it is estimated that this thing will only be able to fire six to seven hundred rounds and the accuracy will be reduced.

"It is estimated that the barrel will not be able to catch up. It is still undergoing chrome plating. After chrome plating, it has to be finished..." Chen Yang said with a wry smile.

"Wait if the experiment here is successful, Chen Gong, you go to the 2983 factory once. The 152mm howitzer with a 55-diameter barrel is currently in trouble..." Liu Yijiu nodded and did not say They must produce more barrels.

Accumulating production experience is the most important thing.

The 2983 factory has very big ambitions. Originally it was only a production of mortars. Now it has directly installed a 152mm heavy cannon howitzer. If it were not blocked by Liu Yijiu, they would even build a 155 or larger.

This is also because of Zheng Hao's support.

For this, Liu Yijiu even personally drew a lot of pictures of key parts for them.

At present, the production of self-propelled artillery is somewhat unrealistic, but the production of towed heavy artillery is definitely not a problem.