A one-meter-long model of a wooden cannonball was placed on the table, and Xiao Yifei and Tang Guozhong were studying it carefully.

Xiao Yifei said: "Guozhong, the shells we shoot do not have to be accurate, if we consider accuracy, we must consider the amount of charge, and we have to calculate the trajectory. If it is accurate to within 10 meters, it is too difficult for us, and it may not take ten years to develop. My idea is to win by quantity, if I can fire ten shells at the little devil in a short time! The result is sure to be a wide area of damage. ”

Tang Guozhong nodded and said: "If the accuracy can be maintained within fifty meters and ten rounds can be fired at the same time, it will definitely be better than the little devil's giant cannon." ”

Xiao Yifei said: "We have to be creative, the little devil only uses one cannon barrel, we use ten. ”

Tang Guozhong said: "We can't even make a cannon barrel, the powerful explosion is completed in an instant, and the slightly worse quality of the tube will definitely blow up the tube." ”

Xiao Yifei said: "The round barrel must not be made, why does it have to be a closed round type?" Why don't we make a semi-circular one? Let the semi-circular tube be used as a bracket to fix the early flight direction. ”

Tang Guozhong smiled bitterly and said, "I haven't heard of it, it's too difficult, right?" ”

Xiao Yifei smiled and said, "Think first! There is nothing difficult in the world, as long as you are willing to use your brain. Why don't we reform the way we launch? What about allowing the air generated by the gunpowder to continue to spray at the tail of the shell body, and let the air flow propel the shell into flight? The ancients could do it, so why can't we? ”

Tang Guozhong nodded and said, "Makes sense!" There is a kind of firecracker in the countryside, called Gaosheng, taking righteousness step by step, and using it during the New Year. Holding the firecracker on a wooden stick, after ignition, the gunpowder in the firecracker continued to explode, and the firecracker flew in the air at a distance of at least 20 meters. According to this principle, we can increase the amount of gunpowder, make the missile body longer and stronger, and I think it is possible for it to fly tens of kilometers. When the amount of gunpowder is large, once it explodes at the same time, the projectile body will be blown up, and the key difficulty is to control the explosion of gunpowder. Because it is propelled by the jet airflow, the manufacturing requirements for the tail jet port are particularly high. ”

Xiao Yifei said with a smile: "Try more, do more, once we succeed, we will have a long-range strike weapon." If you fail, you're just wasting some time. So be it! In the next stage, we will stop fighting devils for the time being, and we will work together to develop this new weapon. ”

After many days of research, a wooden model of a rocket was successfully developed.

At this time, the Second Battle of Changsha had also ended, and the Nationalist Army and the Japanese Army returned to their pre-war state, bounded by the Xinqiang River, with the Japanese army controlling the north side and the Nationalist army still controlling the south side.

Yuantong Temple did not have the ability to manufacture rockets and launchers, so Xiao Yifei contacted Boss Dai, who heard that Xiao Yifei had developed a new weapon, and was very interested, and immediately contacted the Ninth War Zone, which sent people to look for a suitable factory in Changsha City. Through the joint efforts of everyone, the factory was found, and the skilled workers were found. Xiao Yifei and Tang Guozhong Die'er took the national army car and took the model to Changsha.

A month later, the MLRS was successfully test-fired, and although the accuracy of the hit was not high, the accuracy and stability of the shell's flight were gradually improved by adjusting the launch angle and loading the amount of gunpowder.

Xiao Yifei made two ten-barreled rocket launchers and 1,000 artillery shells, and asked the national military car to transport them to Yuantong Temple, where Xiao Yifei conducted test-firing tests in the mountains to improve the rocket artillery.

The shell is equipped with a tail to ensure the stability of the flight of the shell, the shell in the past is flying by inertia, the rocket not only relies on inertia, but also in the process of flight, through the tail gunpowder explosion, generating a strong air flow, pushing the shell to continue to fly. As a result, the flight range of the rocket was greatly increased, and it was able to reach about 15 kilometers. The weight of the warhead striking part was 150 pounds, and the killing range of the warhead fragmentation was 100 meters, which was one of the most remarkable inventions at that time, and it was similar to the Katyusha rocket launcher invented in the late World War II in the Soviet Union. Because the number of those built was small, only two, and they were dedicated to Xiao Yifei, it was impossible for the domestic army to be equipped at that time, so the world did not know.

The rocket launcher invented by Siu Yat-fei's team can be used in a single tube by disassembling and assembling. When transporting, it can be disassembled, and when fighting, it can be reassembled.

Xiao Yifei asked Tang Guozhong's group and Zhou Gaoyuan's team to each be responsible for a 10-barrel rocket launcher. Die'er, Xue Shiyu, Li Shanshan, and Dong Ying were withdrawn, and together with Xiao Yifei, a grenade attack team and a sniper team were formed.

Xue Yue was very concerned about this weapon at first, but later, he gradually lost interest, which was also one of the reasons why this weapon could not be mass-produced.

In Xue Yue's view, this weapon has several fatal shortcomings, one is that the accuracy is too poor, the amount of ammunition consumed is huge, it is not practical, and it cannot be used. Second, it cannot destroy tanks and large fortifications, and its power is still small, so it can only kill and injure infantry. Third, there was no time to train artillery, and his idea was to directly buy American heavy artillery, which would allow the Americans to train artillery. At that time, a batch of American artillery was in Vietnam, and with the help of He Yingqin, that batch of artillery would be transported to the Ninth War Zone, accompanied by Wang Yaowu's army, and he was sending people to Vietnam to get it.

As for Xiao Yifei, he was also reluctant to transfer this technology to the national army, because he knew that after the Japanese drove away, the Kuomintang and the Communist Party would fight.

In any case, Xiao Yifei is selfish, and his principle is to develop his own weapons and use them himself.

Before the onset of winter, the 10-barrel rocket launcher was finally finalized, and 2,000 rockets were made.

On this day, Xiao Yifei and Die'er, Xue Shiyu, Li Shanshan, and Dong Ying stood on a hill looking at the direction of Yueyang City, their hearts were surging, Xiao Yifei really wanted to push this new weapon to the vicinity of Yueyang City and carry out a long-distance attack on the Japanese army!

The Ninth Theater did not attach importance to this kind of weapon, but Xiao Yifei attached great importance to it, and he knew that if the Japanese infantry was discovered by Xiao Yifei's team when they were assembling and attacked the Japanese infantry group at a distance of 15 kilometers, two rocket launchers would be fired at the same time, and only one round would cover the entire Japanese army of a brigade, and its power could be imagined.

The strike effect and strike distance allow the team to go forward and report to the launch position with a walkie-talkie. In other words, someone in front must be the eye of the rear, and the rear must play in accordance with the judgment and instructions of the front. For this reason, the forward observers must also be specially trained, observe with a human telescope in front of them, record the other in a pre-drawn matrix table, and then report the playing method.

Fortunately, Lin Hu was born in artillery, and when he was in the military school, he learned and mastered this method. Lin Hu became an instructor and trained the players.

Xiao Yifei firmly believed that sharpening knives does not mistakenly chop firewood, and if he did not master the rocket artillery strike technology well before the war, he would not be able to give full play to its role in wartime. It's okay to spend more time, it's just a few fewer guerrilla fights and fewer devils! After everyone is proficient in technology, this kind of rocket artillery, Xiao Yifei firmly believes that it will definitely be able to play a major role in striking at the Japanese army, not to mention that it can change the situation of the war, at least it can cause major damage to the Japanese invaders.

Xiao Yifei looked at the direction of Yueyang and said to everyone: "Now that the international situation is changing, Japan has launched a surprise attack on the Pearl Harbor naval base of the United States, and the United States has started a war against Japan. Major changes have taken place in the pattern of the East Asian war, and the United States can no longer stay out of the situation, and has no choice but to fight a war with Japan for the sake of saving face. China has already dispatched troops to organize an expeditionary force to fight abroad in Southeast Asia, and the Japanese army is sending a large number of troops from North China to Southeast Asia, and the total number of Japanese troops in China will inevitably decrease. The Japanese 11th Army in Changsha, in order to delay the Ninth Theater from sending troops to Southeast Asia, will inevitably launch another operation, and the time will soon come for our new weapons to play a role. ”

Xue Shiyu was overjoyed and asked, "Captain, why don't we hurry to Southeast Asia?" ”

Die'er smiled and said, "Brother, Shiyu is bent on going abroad and creating a world for ourselves. ”

Xiao Yifei smiled and said, "Yes! For your sake, we will also go abroad to fight devils in the future, but now the conditions are not ripe. Again, think about it first. What I am thinking about now is the question of how we will enter the war if the Japanese army launches another attack on Changsha, and the advanced new weapons must be kept secret, so that after the war starts, we will find suitable targets and fighters to carry out a surprise strike against the little devils, so as to stun the little devils in one fell swoop. ”

Xiao Yifei's judgment was completely correct, the commander of the Japanese 11th Army, Anan Weiji, received an order from the Chinese Dispatch Army Command to plot a big war in order to drag down the army of the Ninth Theater, and for Xiao Yifei, new fighters would appear at any time. Secret weapons, even in real combat, are put to the test.