Anti-Japanese War, weapons designer at Fengtian Arsenal

The toy on the table is very similar in shape to an RPG rocket launcher warhead, except that it is bigger and rougher. There is a cannon-looking pipe welded to the ground, which is obviously used to launch this warhead.

Li Qinwu asked: "Have you done the test?"

Hu Xiaoming nodded.

“It’s been done, but it’s not very good, the range is not guaranteed, and it’s very dangerous!

After the rocket is fired from the tube, the warhead will fly around. The range is not far. Sometimes the warhead will explode directly in front of us, and sometimes it will not explode. We still have to deal with the unexploded warhead with great effort. "

Li Qinwu said: "Shoot one and show me."

Hu Xiaoming immediately took action. He inserted the rocket into the launcher and then called on Li Qinwu to retreat to the glass shelter in the distance.

Hu Xiaoming held a trigger rope in his hand, and after making sure it was safe, he pulled it hard.

With a loud bang, a string of gunpowder gas rushed out from the tail of the launcher and the rocket was pushed out.

Li Qinwu focused his attention on the rocket. Just as Hu Xiaoming said, the warhead was flying very unstably. It flew around after leaving the barrel, and then crashed into the ground 20 meters away and exploded.

Hu Xiaoming said: "Director Li, the drawings you gave me are too complicated and the factory can't process them at all, so I simplified them.

But the simplified rockets were not stable, and I adjusted several versions, but none of them worked. "

Hu Xiaoming was discouraged. He had invested a lot of energy in this project, but failed again and again, which made him extremely upset.

Li Qinwu touched his chin, recalling the scene of the irregular movement of the rocket just now, and made a summary in his mind.

The test rocket made by Hu Xiaoming had no tail fins, which was one of the reasons why the rocket flew around randomly.

The folding tail of the RPG-7 warhead is still difficult to process now, but Zero will soon mass-produce high-precision machine tools, and the problem of processing the folding tail will be solved by then.

Another problem is that the propellant charge does not burn completely.

The propellant column made by Hu Xiaoming is 30cm long. Such a long propellant column does not burn completely after ignition, and the propulsion force acting on the warhead is intermittent.

This incomplete combustion of gunpowder is also reflected in large-caliber artillery, such as the 410mm main gun of the Great Wall, which can accommodate two or three propellant bags in the barrel at a time.

From a human perspective, when you fire the cannon, the three powder bags ignite almost at the same time, but in fact, ignition is a process. It's just that this combustion process doesn't matter for ordinary cannons. Anyway, in a well-sealed barrel, the thrust of the gunpowder gas will fully act on the shell before it completely flies out of the barrel.

However, due to the structure of the recoilless gun, the gunpowder gas will be blown from the tail, and this incomplete combustion is somewhat fatal.

The recoilless gun does not have an enclosed cabin, and the gunpowder gas acts on the warhead intermittently, which is equivalent to the warhead being pushed several times by several forces before flying out of the gun barrel. So many forces appearing at the same time will make the rocket unstable, so the warhead will fly around.

The solution is also very simple, reduce the volume of propellant so that it can be burned all at once.

Like the German Panzerfaust, it does not have much propellant, and the warhead can maintain a certain stability after leaving the barrel, but the price is that the range is only a pitiful 30 meters.

Another method is to use a two-stage propulsion principle like the RPG7 and let the rocket rotate at the same time.

First, the first-stage propellant column explodes in the launch tube, pushing the rocket out of the rocket launcher. During this process, the combustion gas will pass through a rotating turbine behind the rocket, causing the rocket to rotate.

After the rocket leaves the rocket launcher, its high speed triggers the ignition device of the rocket range extender engine, starts the rocket range extender engine, and opens the folding tail fin at the same time.

This system can make the rocket fly more stably and increase the range to about 300 meters.

There is also a more direct way, which is to update and improve the propellant so that it can burn evenly and release gas continuously, and set a spinning device at the bottom of the rocket.

The continuous jet of gas makes the rocket rotate through the spin device, just like the famous 107 rocket.

With Li Qinwu's current conditions, it is definitely impossible to update to a better propellant, and he can only make a breakthrough in the structure. Fortunately, it won't be long before high-precision machine tools are in place, and by then both the folding tail and the rotating turbine device can be produced.

Li Qinwu found this kind of heavy firepower that a single soldier could carry quite rare. Artillery could not reach many terrains, making it difficult for infantry to attack, but a rocket launcher could effectively improve this situation.

Moreover, this thing is very suitable for guerrillas. There are many volunteer groups active in Northeast China now. They have no heavy weapons and are at a loss as to what to do against the Japanese artillery towers and armored vehicles.

If the guerrillas were equipped with portable rockets, how much casualties could they inflict on the Japanese?

Li Qinwu plans to develop individual rocket weapons in two directions. One is a weapon similar to the RPG-7 that can be reloaded and reused. This weapon can be made heavier and have a longer barrel. The goal is to have a longer range and greater power. It can occupy 1 to 2 people in an infantry squad.

The other type is a disposable weapon like the Iron Fist Bazooka, which has less power and a shorter range. Its main feature is its lightness. It is useless after destroying the barrel and can be discarded directly.

Every infantryman can carry one of these weapons. When they encounter the Japanese infantry charging with bayonets, they can take it out and fire a round of rockets at the Japanese. That scene is simply wonderful!

After thinking it over, Li Qinwu said to Hu Xiaoming: "Xiaoming, give me a copy of the research content of columnar propellant, and I will take over this project.

Now you focus on the reverse mapping of the 20mm anti-aircraft shells, and I will find sample shells for you. It is time for us to enter the field of air defense."

Hu Xiaoming said he understood. At this point, the serious business had been discussed, so Li Qinwu and Hu Xiaoming started chatting about family matters.

Hu Xiaoming suddenly remembered something and said embarrassedly: "Director Li, this... my father asked me to ask you, has the candidate for the principal of our school been decided?"