The family looked at the comrades from the logistics department who ran in, and they all knew that they were here to teach Liu Hai, and Mrs. Liu cried again. "Comrade, can't you just let him finish this meal?" Sima Hong stood up and said. "I'm sorry, I know, I know!" The comrades of the logistics department saw that Liu Hai was holding chopsticks, and the family was also there, and they also knew that the old gentleman was Lao Sima, so they stayed there all of a sudden! "Comrade, let's talk about something!" Bangs put down chopsticks! "Division Commander Liu, I'm really sorry, there is an order, let you rush to the experimental base immediately, our * test suffered a major setback, the * explosion of the experiment, the chief engineer Zhong Lin was injured, the four experimental assistants were all killed, and more than a dozen soldiers were killed and injured!" The comrade from the logistics department said heavily. "I see!" Bangs put down the chopsticks and stood up!

"Dad, mother, I have to go!" Bangs stood up and said. "Go, go, man, man, you should focus on big things, don't worry about the love of your children!" Mr. Sima said. "Oh yes! The location of the experimental base is not far from here, and according to the level of Commander Liu, you can come back every night! The comrade said. Okay, in that case, let's go" Bangs turned back to look at his family, "You guys eat, I'll come back in the evening and eat again!" "Then you come back early in the evening!" Sima Hong stood up and said. "Don't let you finish a meal, is it so urgent?" "Go, go, just come back early in the evening!" Liu Tianzheng waved his hand! "Alright, let's go!" Old Sima waved his hand, and Liu Hai glanced at Sima Hong, turned around and followed the comrades from the logistics department!

"What's going on?" After getting into the car, Liu Hai hurriedly asked. "Hey, this * in my opinion, then it is the same as the New Year's artillery battle, but how can it not be built, early this morning, we did experiments, but I don't know how to do it, a little fire was blown up on the spot, Engineer Zhong and his assistant sat in the car, ready to observe the launch of *, the result is four dead and one wounded! The surrounding warriors were also affected! The comrade from the logistics department said, "I was also transferred to participate, but I didn't expect it to be so difficult!" "* is different from artillery shells, artillery shells are kinetic energy bombs, relying on the thrust generated by the explosion in the medicine room, but * is flying with its own fuel, the reason is similar to that of an airplane, so it is naturally difficult!" Bangs said while thinking.

After arriving at the experimental base, Liu Hai saw a puff of black smoke curling up from afar, and the scene of the explosion had not yet been dealt with! "Are you Senior Commander Liu?" A base leader came over and said. Liu Hai turned his head to see this person, and was surprised to find that this person was actually the principal of the party school he was in. "Headmaster? Why are you here? Bangs said in surprise. I'm not the principal anymore, I'm the commissar of the *experimental base! "Hello commissar!" Liu Hai saluted. "You're welcome, I asked you to come back to make Katyusha artillery*, but now you have seen it, the difficulty is unprecedented, but you can't be discouraged, tell you one thing, we imported *, one is converted, it costs eight taels of gold a piece!" The political commissar said heavily. "I see!" Bangs looked at the black smoke from the explosion and said. "You go and meet the chief engineer Zhong Lin first, this time he is injured, and he is in the medical room of the base!" The commissar said. "Okay, I'll take a look!" Bangs said.

Liu Hai came to the infirmary of the base, where Zhong Lin, who was wearing glasses, was lying there for infusion, with a depressed face! "Engineer Zhong, I am the bangs who were transferred to participate in the development of *!" Bangs walked over and said. "You're the bangs they say they say?" Engineer Zhong lifted his glasses and looked at his bangs. "Yes!" Bangs sit down! "It's great that you're here, I heard that you have experience in making heavy artillery shells, and you studied in Germany, it's great!" Engineer Zhong said. "But I haven't been in contact with* yet, and I don't have much confidence in this mission!" Bangs tell the truth. "Nope! You can help! Engineer Zhong said, "The key to our own * is the processing of the steel body, the fuel combustion needs the high temperature resistance of the chamber wall of the combustion chamber, and the high pressure must be absolutely balanced in the thickness and thinness, I heard that the steel processing when we manufacture heavy artillery shells is your responsibility, so as long as you can process the qualified * steel, we can succeed!" "That's right!" Bangs thought about it and didn't speak!

"The reason for our failure this time is that the steel processing is unqualified, and the pressure of the combustion chamber is unbalanced, which leads to the explosion in situ, as for the structure of the *, we are very clear!" Engineer Zhong said. "In this way, you recuperate first, and as for the processing of steel, I need to go to the steel mill for research, and I also need an imported Soviet *!" Bangs said. "Good! I'll send you right away!" Engineer Zhong said. After Liu Hai finished speaking, he didn't say anything more, and immediately drove to the steel plant in Shenyang with the Soviet imports*! After arriving at the steel plant, Liu Hai immediately disassembled *, and when Liu Hai carefully took out the warhead of *, he began to study the structure and manufacturing process of the Starter*! "The main task is to study the steel of the medicine room!" Liu Hai said to the technicians at the steel plant. "This steel doesn't look like much!" A technician said, looking at the steel in front of him.

"You're looking at the wrong place, *'s medicine room is in the back, and behind it is his propulsion device, *if it's burning in this medicine room, so the just moment of this medicine room is the key!" Bangs said. "The steel in front and back is not the same, isn't it?" The technician asked. "This is the characteristic of Soviet-style weapons, the unimportant place is to reduce the cost with the general processing level, and the important place is to strive for perfection to ensure the quality, this one * eight taels of gold, too expensive!" Liu Hai said, "In fact, what we have to overcome is the thickness of the medicine room, as long as the quality is passed, the thickness of the medicine room is the same, * full combustion can achieve the effect!" "Let's experiment while trying to make it, we don't have experience in this area yet!" "What kind of toughest steel do we have here?" Bangs asked. "Quenched steel!"

Liu Hai took several old workers of the steel mill and began to use ready-made quenched steel pipes to make the * medicine room, but I don't know why, it always fails, no matter what method is used, it either explodes after combustion, or it cracks, in fact, the steel used by the Soviets is the same, but it just doesn't work! Bangs and the workers repeatedly experimented, but they were never able to break through the technical difficulties, and finally succeeded once, but the range was only half of that of the Soviet style*, so they had no choice but to start from scratch at one time! Liu Hai didn't know that he had been in the steel mill for a week, but he had never been able to process qualified * steel, at this time, Su Huizhen came back from the Soviet Union, and when he heard that Su Huizhen was back, he immediately ran to find Su Huizhen to see if he could let her think of a way!

"Master Liu, Comrade Su Huizhen is back, but he has already gone to Beijing, and we don't know what to do, but the good news is that Engineer Zhong has recovered!" Comrades from the logistics department told Liu Hai! After Liu Hai heard this, he turned his head to find Engineer Zhong. "Senior Commander Liu, you came just in time, I was just going to look for you!" Engineer Zhong said happily when he saw the bangs coming. "It's useless to look for me, we haven't made qualified steel yet, and there are also problems with the molding and processing of *, and our technology is not enough!" Bangs said with some frustration. "I'm looking for you for this!" Engineer Zhong said, "I found that the Soviets* are not very technically difficult, but they have a little trick, you come here and I'll tell you!" "What's the trick?" Bangs asked strangely.

"You see these strips in the middle, I think that's the way, the Soviets just added a little reinforcement to the siding! The siding of the rocket shell has reinforcing ribs arranged in a grid-like pattern to increase the rigidity of the structure. Although the large-area grid wall panel can be made by chemical milling, compared with mechanical milling, the wall thickness is uneven, the root of the rib is filthy, and the residual weight of the parts is more. The use of mechanical milling grid wall plates can ensure uniform wall thickness, accurate dimensions, and reduce residual weight, thereby increasing the payload of the rocket. The use of mechanical milling process generally requires a large mechanical milling machine. During processing, the plate is sucked by a vacuum suction cup, and the straightness of the plate is required to be high. So the biggest problem now is that we don't have qualified large mechanical milling machines! "Engineer Zhong introduced the situation!" Large-scale mechanical milling machines? Bangs said to himself.

When Liu Hai heard the term large mechanical milling machine, he seemed to be moved in his heart, as if he had seen it somewhere, but he couldn't remember it all of a sudden! "Wait a minute, I'll think about it!" Bangs struggled to recall, searching for this word in his memory! After a while, Liu Hai remembered that the political commissar of the Soviet Army told him the burial location of a Japanese army's super-large caliber heavy artillery, and that burial site not only had heavy artillery, but also a shell processing workshop, and this large mechanical milling machine seemed to have one in it! "I know where it is, although it is a Japanese thing, but we can copy it, and we can strengthen it, the problem is that I don't know if the large mechanical milling machine is still there!" Bangs said. "Where?" Zhong Gong asked excitedly. "In a secret warehouse of the Japanese army!" Bangs said. "Then let's go find out!" Zhong Gong said excitedly.

Liu Hai and Zhong Gong didn't stop for a moment, and immediately drove to the burial site, only to find that the processing workshop was empty!