Chapter 791

Of course, they will not agree to this immediately. It will take a long time for them to make a decision. Anyway, they are not in a hurry.

On one side, old Huang was very interested in Qin Guan's idea: "President Qin, do you think our submarine launched missiles can still go to land?"

If it is only submarine launched missiles, it will not be equipped with much. A nuclear submarine is equipped with more than a dozen, up to more than 20, and on land, it will be equipped with more. After all, the cost of submarines is high, and how many launch vehicles are there on land?

Qin Guan nodded: "yes, our dongfeng-3 can launch and drag, but it is a liquid rocket motor. It takes a long time to prepare. Only by changing it to a solid model, we can drag and run at ordinary times. In case of situations, we can fight vertically, which is much more efficient."

Think of Dongfeng 21 in future generations. That is the heavy weapon of a great power.

In 1984, the country will hold a big military parade. If at that time, it will be a sensation to show its own solid ballistic missiles!

There are two ways for missile launching vehicles. One is to lead the head, and the back is just a trailer. In this way, they can only travel on the road and do not have the ability to maneuver in the field.

One is the all wheel drive off-road chassis. These are professional. It is impossible to refit ordinary automobile parts, and Qin Guan yearns for the latter way.

There are many strategic materials in the weapons cemetery. As long as you exchange one and let the North Heavy Truck Factory refit, that's enough.

The biggest feature of launching by land mobile launching vehicles is concealment, and the enemy can't find it at all.

If the enemy wants to conduct a nuclear attack, the first target is his own missile launch positions. Those fixed silos have the lowest survivability and are the first targets to be hit by nuclear attack.

No matter how well the silo is camouflaged, the enemy's reconnaissance satellites detect it every day, and the enemy's intelligence personnel analyze it every day, they can finally find it.

Although there may be camouflaged silos, the most is to waste some missiles of the other party, and blow them up together, really or not.

Mobile launch, it's different.

These vehicles usually travel back and forth on the road. Where can the reconnaissance satellites in the sky be distinguished? Even if they can track up, drive into a cave, and then come out, they completely disappear from another secret exit in the dark.

It's an impossible task to track a huge mobile launch vehicle. If some fake vehicles pretend to be, it will make the enemy helpless.

As long as they are not sure that they will kill all their nuclear weapons in the first round, they will not dare to launch an attack. This is the origin of nuclear deterrence. You can destroy me and I have the ability to destroy you.

"Yes, it's a good idea to land submarine launched missiles." just then, a voice came from behind.

General ye turned around here and returned to the table here. Hearing Qin Guan's words, he immediately thought that this matter was of great significance.

"President Qin, we still point to the North Industrial Company for the corresponding missile launch vehicle." general Ye continued.

The people present can be responsible for the missile. Of course, the launch vehicle should find the most advanced heavy truck manufacturer in China. After all, the missile launch vehicle is also a kind of heavy truck.

Qin Guan nodded: "as long as we give us the technical parameters of the missile, we can develop the corresponding heavy truck. We promise to complete the task."

"Although it is more convenient to equip submarines, our country cannot produce a large number of nuclear submarines," general Ye continued.

At this time, Qin Guan suddenly remembered something: "it's not just the output of nuclear submarines, but also the noise of our country's nuclear submarines?"

At present, the country's first generation nuclear submarines are completely top secret, but this does not prevent the western world from speculating about the nuclear submarines of Han.

In the underwater world, radar can't be used. The only thing you can do is listen to the sound.

For submarines, the vibration of their engines will produce sound, the tail propeller will make sound, and the hull movement and seawater friction will also make sound.

Therefore, technical experts from various countries are sparing no effort to reduce this sound. The most common methods are, for example, setting rubber damping for the engine, not rigid connection with the boat body, laying silencing tiles on the boat body, and using more advanced propellers.

The submarine must make a sound, which is unsolvable. If the sound it makes is so low that it is similar to the background noise of the ocean, it will be difficult for the other party to detect.

The background noise of the ocean is about 90 decibels. The most common Los Angeles class nuclear submarine of Eagle people is 128 decibels, while that of bear country is larger, more than 130 decibels, while that of Han class submarine of Han country is 165 decibels.

What kind of number is this?

When the eagle people squat 200 nautical miles away in the submarine port of the Han country, they can hear the movement of the Han country's nuclear submarine, and the Han country's nuclear submarine finds that the eagle people's submarine is absolutely no more than 50 kilometers away.

It can be said that the nuclear submarines of the Han Dynasty have only solved the problem of whether they have or not. The technology of Han is backward.

When thinking of this, Qin Guan suddenly thought of another thing: "general ye, although we can't build a large number of nuclear submarines, we can change the performance of our nuclear submarines. For example, in the simplest way, as long as we process a seven blade large side inclined propeller, we can greatly reduce the noise of our submarines."

When it comes to the propeller of a submarine, it is inevitable to mention a seven blade large side slope.

An ordinary submarine propeller, which is a three blade propeller, has low efficiency, so it must have high speed. When the speed is high, the propeller stirs the sea water and makes a loud sound. At the same time, the circumferential load of propeller blade is uneven, and cavitation, sound and vibration will be generated during rotation, resulting in high-intensity noise.

If it is changed to seven blades, the efficiency is high, the speed is low, and the sound is small. At the same time, this large sideslope is also to further reduce the noise and achieve the most perfect scheme. It can be said that the use of large skew, variable pitch and multi blade propeller can improve the water flow and pressure state at the blade, reduce cavitation and reduce propeller noise.

Unfortunately, there is no such processing technology in Han Dynasty.

The whole special alloy used for submarine propeller is generally copper alloy, which is cut out on the machine tool. The ordinary three blade propeller can be used on the domestic machine tool. However, if it is a seven blade large side inclined propeller, the ordinary machine tool processing can not reach the accuracy at all. It must be used on the advanced multi axis linkage NC machine tool. This complex curved surface, Only multi axis linkage can be solved.