Chapter 919

This construction, of course, was won.

In January 1960, the first aircraft department held a meeting on the "031" boat. The original planned shipyard has not yet formed production capacity and does not have the conditions to start construction in the short term. The meeting suggested that Huating Jiangnan Shipyard be built, but the shipyard has no time to undertake it because it is building "033" boats.

In this case, the leaders of Bincheng shipyard who attended the meeting volunteered to undertake the construction task of "031" boat. After repeated investigation, it was found that there was no problem, and the task was assigned to Bincheng shipyard.

On March 3, 1960, "031" submarine began drawing setting out; on April 1, 1960, the commencement order for the construction of "031" submarine was officially issued, and the fortification number in the plant was "c-601".

In May, in order to improve the professional technical level of construction personnel, the shipyard held professional training courses on machining, welding, heat treatment, installation, commissioning and test of special instruments and equipment, focusing on the processing and welding of ak-25 and ak-27 steel plates shipped from Xiong Guo and the use of stainless steel welding wires, and invited Xiong Guo experts to carry out practical technical training according to the requirements Give lectures and impart experience in types of work and majors.

Originally, the two countries were ready to make a big fight. As a result, the two countries had a bad relationship, Xiong Guo withdrew the experts, and the follow-up materials were not transported.

In this case, Bincheng shipyard carried forward the fighting spirit and finally completed the trial production of the first submarine through exploration. Originally, it planned to build two of the first batch of imitation submarines, and then arranged to build four during the "second five year plan" and "third five year plan" During the planned period, 36 ships were built. However, due to technical constraints and the lack of development of supporting submarine launched ballistic missiles at that time, no follow-up ships were built, only one was built.

This submarine has a displacement of more than 3000 tons, belonging to the category of large submarines. The displacement of 033 in the same period is less than 2000 tons.

At the same time, its advantage lies in its ballistic missile submarine. The submarine designed by Xiong Guo is equipped with three ss-n-4 submarine launched ballistic missile launchers. The missile is 9.5 meters long, 880 mm in diameter and 350 km in range. Although its performance is not very good, it is a submarine that can launch ballistic missiles after all.

Although after service, due to the lack of supporting missiles, the submarine can only be used for training for a long time.

At the same time, as the Han country is ready to start developing the first generation submarine launched ballistic missile, it needs to carry out a large number of underwater missile system joint training and launch tests, and the boat itself has the ability to launch ballistic missiles. Therefore, it is decided to take the 031 boat as the test boat to cooperate with the early launch tests of the first type submarine launched ballistic missile made in China.

In this case, the 031 submarine began to refit.

In the first step, three Soviet made cm-60 underwater missile launchers on the boat were changed to two domestic designed "julang-1" underwater missile launchers.

The core of the new launching device is the missile launching device that pushes the missile out of the barrel and out of the water. It crosses the technical level of the first generation compressed air launching device and gas launching device of submarine missile. Following the eagle ballistic missile nuclear submarine, it uses the latest gas steam launching device. With simple system structure, small missile launching overload and large ejection thrust, it has the world-class capability Technical level.

Later, in order to improve the missile launching capability under high sea conditions, the boat was refitted for the second time. After this refitting, the side number was also changed to expedition 200 submarine.

However, the missile test firing is a very complicated process. Every time we come back, we have to make improvements. This time, when we go back to the shipyard, maybe there are some items that need to be greatly improved.

Normally, this is the top secret in China, but Qin Guan's level has been reached. Moreover, with Qin Guan's participation, maybe these problems can be solved?

"President Qin, we still have a long way to go if we want to complete the experiment. Now, we have conducted enough experiments on underwater launch and accumulated a lot of experience. There are not many problems for the missile to successfully get out of the water. However, the positioning of the submarine is still a big problem."

If you want the missile to hit accurately, you must have an advanced positioning system.

The launch of ballistic missiles is a complex process. The position of the missile at the time of launch, the position of the target, the rotation of the earth and other factors are taken into account, and then the computer calculates the trajectory, when the engine is shut down, when to re-enter the atmosphere and so on.

If this is not accurate enough, the error of the missile in the past may be thousands of meters.

On land, the location of the launch site is determined. Even for mobile launch, a certain launch position is found in advance, and the coordinates are known.

But the sea is different.

Submarines sail in the sea and launch missiles as needed at any time. If they can't know their position accurately, the accuracy of launching missiles is not high enough.

Qin Guan also frowned: "yes, let us solve this problem. We use our own methods to obtain some advanced technology from the world, and then give it to our technical experts. We hope to develop laser gyro as soon as possible."

The development of high technology is not easy. Up to now, there are still some technologies in China that have not caught up. Inertial guidance system is one aspect.

Besides submarines, fighters and missiles all need this advanced technology.

Inertial navigation system is a navigation parameter calculation system with gyroscope and accelerometer as sensitive devices. The system establishes the navigation coordinate system according to the output of gyroscope, and calculates the speed and position of carrier in the navigation coordinate system according to the output of accelerometer.

Among them, this gyro is of great importance. The smaller the resistance on the gyro, the better.

The original ball bearing gyroscope has a drift rate of (L-2) ° / h, which is very poor. The original V-2 rocket is such a guidance system, with a range of only a few hundred kilometers, and the error may be more than ten kilometers.

After that, the precision of air, liquid and magnetic levitation gyroscopes developed by overcoming the inertial instrument support technology can reach 0.001 ° / h.

At the current level of the Han Dynasty, liquid floating gyroscopes and Long March rockets are used. Although the accuracy is not low, the accumulated error is still considerable. If the submarine patrols underwater for half a month, it can not meet the needs of launching missiles.

This time, they went out for half a month, then came back to readjust the gyro and were also discussing a solution.

What's the solution? Laser gyro, of course.

In 1960, the laser gyro was successfully developed for the first time. In the western world, this gyro is widely used for inertial navigation. Western fighters, missiles, etc. all use this gyro.

However, the Han country has no technical reserves.

What should I do? Of course, I found it in the weapon data cemetery! This difficulty is not only for submarines, missiles and aircraft. Qin Guan has made up his mind to find information and give it to Professor Lin, the leader of navigation system research in the Han country. Then if you need processing equipment, you can find it from the machine tool cemetery. In short, this technical problem must be solved!

"If we don't have enough time, we can also import western advanced laser gyroscopes through some channels and install them on our submarines to meet the needs first," Qin added.

After all, the underwater launch experiment is in full swing. You may not be able to wait for your own research. It is not difficult to import a finished product from the western market.