Chapter 19 Principles of Rocket Artillery The meandering bridge was opened to traffic

Hearing Zhang Zhimu say that they should develop rocket artillery, Li Yunhe asked: "Rocket artillery?" I've heard about rockets, I haven't heard of rocket artillery. The Ming army now uses the god rocket screen, a swarm of bees, a group of leopards running sideways, and a hundred tigers running together are all rocket launchers that can be combined in a variety of ways, with a range of 150 meters to 500 meters, and they are firearms that can cover the strike firepower. However, compared to our mortars, it is basically negligible. ”

Li Wei also said: "Yes! We have artillery of all calibers, why are we developing rocket artillery? ”

"The artillery we are developing now, because the steel is not up to par, the barrel is extraordinarily thick, so it is also very cumbersome, and if there is no tracked tractor, it is very difficult to move, especially heavy artillery. Another problem with our development of rocket artillery is that no matter what we do, the firing density of our existing artillery will not reach the level of coverage and strike that Li Yunhe just said. Since the shells of rocket artillery are powered by their own engines, they have no recoil when fired and do not need buffers. Such a launcher is very flexible to move. Moreover, with our current technical capabilities, it is not very difficult to develop rocket artillery. You all know the principle of the rocket, but we have to replace the original bamboo tube with alloy aluminum, and replace the black ** for launch with our smokeless**. The key to this problem is to be able to control the burning speed of ***, and don't let *** burn all at once, so that it will become *** directly. After Zhang Zhimu finished speaking, he saw that Li Yunhe and Li Wei were still staring at each other, knowing that they didn't have the concept of rocket artillery yet.

"Don't be stunned, bring pen and paper!" Zhang Zhimu said.

"Hey!" Li Yunhe woke up and hurriedly went to get a pen and paper.

Zhang Zhimu drew a sketch, combined with the sketch and said: "This rocket artillery can be divided into two parts: rocket artillery and ***. The rocket artillery is composed of a launcher, a slewing mechanism for the high and low directional aircraft, an aiming device, a power supply, a launch ignition control device and a carrier vehicle. It consists of a warhead, a fuse, a rocket engine, an electric ignition device and a tail. ”

Li Wei and Li Yunhe snatched the sketch drawn by Zhang Zhimu and looked at it, Zhang Zhimu Yile said: "Nothing else is a problem for you. The problem is that it takes a bit of thought to develop a rocket engine. My idea is, can you make nitrocellulose and rubber very good to cast into a chemical column, when ignited, the rubber can play a certain role in flame retardant and reduce the combustion rate. Leave a small vent at the bottom of the rocket, which will increase the speed at which the rocket gas is fired backwards. ”

Li Yunhe asked: "How big caliber do you want to do?" ”

"You're going to start with a 100-millimeter caliber one. More on that later as needed. Zhang Zhimu said.

"This thing won't shoot very accurately, and it's more affected by the direction of the wind." Li Wei understood at a glance.

"You're right, this thing can't compare to the accuracy of artillery, but it's used to cover targets. This makes up for this shortcoming. We can also control *** rotation through the tail to improve flight stability. Zhang Zhimu said.

"It's not too hard to arrange for someone to spend some time." Li Yunhe said confidently.

"Huh! Li Yunhe is terrible now! Li Wei was a little unconvinced.

"What's the, don't believe it, bet, we'll get it out in a year, believe it or not?" Li Yunhe said.

"I believe it, I believe it," Li Wei really believed, Li Yunhe was not an ordinary cow now, "I hope you get this thing out sooner." ”

"You know what? I asked you to develop this rocket artillery now with another idea, that is, I want you to master rocket technology as soon as possible. In the future, we will also develop liquid rockets and rockets with greater thrust. Zhang Zhimu's words attracted the attention of Li Wei and Li Yunhe again.

Zhang Zhimu picked up a pen and drew a circle on the paper, and drew another cannon on the circle, saying: "Suppose that this circle is our earth, then we will fire a cannon here, and the cannonball will fall along the arc trajectory." If we increase the initial velocity of the shell, then the shell landing point will move forward. Zhang Zhimu drew a few ballistic planes, and the landing point was drawn all the way to the other side of the earth, and then asked Li Wei: "What would happen if our shells were faster?" ”

"Could it be that the shells will fall on ourselves from behind?" Li Wei was a little surprised.

"You're right!" Zhang Zhimu drew another trajectory, landed on the gun position, and then asked: "What happens if the speed of the shell is fast?" ”

"This ....." Li Wei: "This" can't come up.

Zhang Zhimu drew another ballistic, and this ballistic drew a circle along the earth, "This cannonball will never fall, he will go around the earth." ”

"You're talking about the first cosmic velocity in physics!" Li Yunhe interjected.

"That's right, Li Wei just doesn't want to learn." Zhang Zhimu said, "Now the middle school students in Yaogang understand this truth. ”

Li Wei was even more competitive and asked, "What if the cannonballs are faster?" ”

Zhang Zhimu drew a parabola and said, "The cannonball shot out of the earth!" ”

"It's impossible, what a cannon to make! We're getting a little scared when we use our guns. Li Wei said.

"You're right," Zhang Zhimu said, "The initial velocity of the cannonball cannot be increased infinitely with artillery, not only because of the size of the artillery, but also because of the detonation rate." But we can. We can make a large rocket, which is loaded with a lot of ***, and fly out all the time to accelerate continuously, and we can reach this first cosmic speed or even the second cosmic velocity. That's one of the reasons why you developed rocket artillery. Otherwise, with our current firearms, can anyone compare with us? ”

"What's the use of flying so high and so far?" Li Wei asked.

"Haha! That's too useful. Does it feel different to take pictures from the air on a delta wing? Haha reminded Li Wei with a smile.

"Of course, it will be much easier to conduct aerial reconnaissance in the future. We're also going to use the delta wing to calibrate the artillery," Li Wei replied. If we could fly that high, wouldn't we be able to conduct a whole-earth reconnaissance? Zhang Zhimu asked, "And yes!" In the future, if our warships are going to sail around the world, can we use it for relay communication? ”

"I haven't thought about what you're talking about," Li Wei can't understand it now, "but I know that rocket artillery is still very useful." ”

"Huh! Li Wei is now dreaming of forming a rocket artillery unit! Li Yunhe said teasingly.

Li Wei became a little interested, "Isn't it okay for us to launch cannonballs at the moon in the future?" ”

"Of course you can, but there is neither Chang'e nor a laurel tree on the moon." Zhang Zhimu said.

"I went to see the astronomical telescope that Sun Liang made for Yaogang College, and when I looked at the moon with that thing, I could see that the moon was full of potholes, and there was nothing." Li Yunhe said, "Sun Liang and the others are now working on a one-meter aperture telescope, and the teachers of the college say that they can see more clearly at that time." I wonder what I could see at that time? ”

"If only I could see Chang'e! Hehe! Li Wei joked.

"Come on, stop laughing. What are the results of your artillery research center? Zhang Zhimu asked Li Wei.

"These guys are willing to study the use of artillery, and no one is willing to study basic things such as the law of explosion and the chamber pressure of artillery, forcing them to study something, and there is not much progress." After Li Wei finished speaking, he asked Zhang Zhimu again, "We haven't had a good way to measure the exit speed of that artillery, do you have any tricks?" ”

"It's easy," Zhang Zhimu said, "you just go to Yang Chang." You can place two induction coils at a certain distance outside the muzzle compartment, put a magnet on the shellhead, when the cannon is ejected, the magnet will induce a signal on the coil successively, the first signal triggers a pulse counter, and the second signal turns off the pulse counter, so that according to the pulse counter counting value, you can calculate the time between the two coils of the shell, and then the distance between the two coils is not the speed out? ”

"Oops! Why didn't you say it earlier? Li Wei clapped his hands and said, "This thing is worrying us to death." ”

"You didn't ask me, did you?" Zhang Zhimu said, "In the future, you will have more contact with Yang Chang and them, and use their electronic technology on your artillery, which will produce unexpected results." ”

"I've been there to get them, and they're like madmen. No one looked up at me when I went in, and I didn't know what they were up to. Li Wei said.

"Don't talk nonsense, they didn't make up the radio you use. Those people are really desperate, and they can't even take care of eating when they study anything. Li Yunhe was dissatisfied with Li Wei's nonsense.

"Good! I don't talk about your people," Li Wei asked Zhang Zhimu again, "Can we make a fuse that explodes at a certain height above the ground?" If there is such a fuse, it will be very difficult to deal with infantry, and every shell can be like anti-infantry**. ”

"That's called a proximity fuse!" Zhang Zhimu said, "I also have to find Yang Chang and them for this matter." However, the cost of proximity fuses is high, and radio technology is required. However, it is still worth using a proximity fuse against infantry. Shells can be prefabricated with shrapnel, and if such an air explosion occurs, the lethality will be greatly increased. ”

Li Yunhe said: "The difficulty now is how to reduce the weight of the barrel, we now make steel barrels, especially the barrels of 203 caliber, the walls of the tubes are thin, and they will explode after a few shots." Now the barrel of the cannon does not dare to use it anymore after fighting too much, for fear of exploding. ”

"Now we are transporting chrome ore and nickel ore back, and in the future, we will use nichrome alloy steel as the barrel, and the strength of the barrel will increase a lot." Zhang Zhimu said: "In the future, if we can have electroslag remelting technology, the quality of the steel will be improved a lot." It would be even better if there were X-rays. ”

Li Yunhe said: "The hardness of the steel will increase if chromium is added, and the tensile strength can also be increased when nickel is added. Steel with chromium-nickel will increase the cost a lot, but the life of the barrel will increase, and the barrel can also reduce weight. We all know this, what are you talking about X-rays? ”

"You know, normal light can go through glass, but there are other things that we don't see, and one of them is called X-ray. This light penetrates so much that even steel can't stop it. It can also pass through the human body, and we can use this property to perform non-trace detection of materials, and we can also give our bodies a fluoroscopic examination. Zhang Zhimu knew that it was not easy to explain this X-ray.

Li Wei smiled and said, "Then if we wear this clothes, can this light also penetrate?" ”

"Not only the clothes you wear can penetrate, but also your heart, liver and lungs. In the future, we will study this kind of machine that can see. Zhang Zhimu said.

"Don't! Mr. Zhang, we don't study this thing, if we have this thing, we kiln gang people don't dare to go out. Others will say that the eldest girl and little daughter-in-law of their family were seen by us through our clothes, do you say we are wronged? Li Yunhe waved his hand and said.

"I didn't expect you kid to be very evil!" Zhang Zhimu said, "Without special equipment, you can't do perspective, so don't think about it." Zhang Zhimu said this, and was already thinking about letting Yangchang and them study X-rays. This thing is too important for the inspection of welding and metal materials. Besides, human fluoroscopy is also more needed, and Zhang Bingchen will definitely be more able to understand this kind of thing.

When the train stopped at Hequ Station, Zhang Zhimu saw through the window that there were many people on the platform, so he asked Li Yunhe: "Didn't I say don't let everyone come out to pick me up?" Why are so many people here? ”

"I can't take care of that." Li Yunhe said, "I heard that you are coming, can they not take it?" ”

As soon as Zhang Zhimu stepped on the platform, Princess Anping came over with the two princes. Without waiting for Zhang Zhimu to speak, King Zhou said: "Zhang Dongjia, it's great that you're here!" This bridge is the first bridge in the world! It is even more spectacular than the two bridges on the Fen River combined. ”

"You arrived first, so you waited a long time." Zhang Zhimu said politely.

"Hey! We go to the bridge every day, and we are waiting for you in vain. The Acting King came and said.

"I'm really embarrassed to let you pick me up," Zhang Zhimu said kind words, and after shaking hands with the two princes, he shook hands with Zhou Yuji and Jiang Ji in the back. Behind them were the commander-in-chief of the bridge and a group of people, and then behind them were officials from the surrounding areas such as Hequ, as well as people from all walks of life in Hequ.

Zhang Zhimu knows that this bridge will bring great benefits to the people around here, and this benefit will gradually become more and more obvious.

Zhang Zhimu suddenly noticed why Princess Anping didn't see it, and asked, "I seem to have seen Princess Anping just now, why is it gone?" ”

At this time, Princess Anping came out from behind the crowd, and her mouth was unforgiving, "Oops! Zhang Dongjia can still think of me, I thought that I accompanied Sister Hongyu's clothes back to my hometown, and others would have long since stopped paying attention to them! ”

"Don't you dare to put Her Royal Highness in your eyes!" Zhang Zhimu said, "Especially, I want to thank you for accompanying the two princes here so hard!" ”

"Yes! It's hard enough. King Zhou quipped, "It's really hard to accompany us to eat the big carp of the Yellow River every day!" ”

"Haha!" Everyone laughed when they heard King Zhou's words.

Princess Anping said, "Hi! If you don't come here, you don't know, the Yellow River carp here is the best in the world! At Zhang's house, let's eat fish at night! ”

"Good! I am most willing to eat fish, especially the big carp of the Yellow River. ”

The next day, the opening ceremony of the Hequ Bridge will be held, and Zhang Zhimu will inevitably get drunk with everyone tonight.

After drinking a few laps of wine, Zhou Yuji said: "Everyone is happy that this bridge is open to traffic, but I am the happiest." I have been stationed here for many years, and I never dreamed that such a bridge could be built over the Yellow River, and the Mongols on the other side of the Yellow River were defeated by us. We are now the masters of Ordos. Now that the road leading to the soda ash mine in Ordos has been built, as soon as the bridge is opened to traffic, the soda ash can be transported directly to the kiln. It's just wonderful. ”

Zhang Zhimu took Zhou Yuji's words and said: "General Zhou is right, the soda ash ore in the Mu Us Desert is very pure, and with this mine, the cost of glass cement can be greatly reduced." The cost of many chemical products can be reduced. The bridge is open, and not only can things be easily transported out here. Even oil from the oil fields in the Shenmu area can be shipped out through here. In short, the benefits of this bridge will increase more and more. ”

"Zhang Dongjia, when can we build a bridge so that our train can also run across the Yellow River?" The king thought more.

"The bridge we are building in Tongguan is a road and rail bridge, and when they have some experience, we can build another railway bridge." Zhang Zhimu said, "At that time, a bridge over the Yellow River would also be built in Baotou, and a railway would also be built along the Qinzhi Road to Baotou. In that way, the traffic in the north and south of Shaanxi will be more convenient. ”

Everyone is full of expectations for the prospects depicted by Zhang Zhimu. Zhou Yuji said: "In that case, our Hetao area will be connected with Shaanxi and Shanxi. It is no longer a closed place. ”

The opening ceremony of the Hequ Bridge seems to be very well prepared, and the bridgehead is noisy with gongs and drums. Zhang Zhimu didn't expect so many people to come, and there were many, many people gathered at both ends of the Hequ Bridge. Zhang Zhimu said to Li Yunhe: "You will tell the commander-in-chief of the bridge in a moment." After the opening of traffic, do not let the car ride the bridge for the time being. Because there are so many people coming today. Wait for the crowd to disperse, and then let the car get off the bridge. ”

"Yes! There are so many people in this place. ”

After cutting the ribbon on the bridge with the two princes, Zhang Zhimu inevitably made an enthusiastic speech. For Zhang Zhimu, these are already things that come as soon as he opens his mouth. Then the representatives from all walks of life spoke.

This bridge ceremony is not at the bottom of the level, not only Zhang Zhimu but also two princes. The people still value the two princes very much.

When the two sides of the bridge were allowed to pass, many people were unhappy due to the restriction of traffic and horses, but most of the people on foot flocked to the bridge happily. Standing on the high Yellow River Bridge, everyone invariably crowded into the middle of the bridge, standing on the bridge in the middle of the Yellow River, looking at the Yellow River on both sides of the bridge, the joy is indescribable.

Zhang Zhimu suggested to the director of the management committee of the Hequ Bridge: "You should set up a photo spot at each end of the bridge. How nice it would be to have a photo of the bridge and want to take a commemorative photo. You can still have a little income. ”

When the director heard this, he said, "That's right! How could we not have thought of such a thing? Not only to meet everyone's needs, but also to benefit. Everybody's happy. ”

It wasn't until the afternoon that the crowd dispersed considerably, and the cars and horses on both sides of the bridge were allowed to pass. Due to the advance publicity, no bridge tolls will be charged three days before the opening of traffic. Today, there are also a lot of cars and horses.

After the bridge ceremony, Zhou Yuji made a work report with Zhang Zhimu.

The current Zhou Yuji's mental state is simply very good, and it is obvious that his eyes are extraordinarily confident, "Mr. Zhang, although some places on our side have been flooded this year, it is still a bumper harvest year. Where the flood washed away, we also reinforced. The embankment was also raised. To be honest, we are not afraid of waterlogging here. When the water is big, we bring the water into some deserts, and the mud brought by the water spreads a layer of mud on top of the desert. This layer of mud is nothing elsewhere, but in the desert, it is terrible, at least he covered it with sand. We then planted trees, sand willows, and grass and soon it was green. This year, the kiln cement plant in Baotou will be put into operation, and with cement, we will build a water supply line along the Qinzhi Road along the Qinzhi Road with cement pipes, and strive to plant trees on both sides of the Qinzhi Road. ”

"Huh! Commander-in-Chief, your role has changed so quickly! Zhang Zhimu joked, "I heard Li Dong say that your army here has made great efforts to build them there. I am proud to have a general like General Zhou who has a big picture view, which shows that we have not chosen the wrong person for you here. ”

"Hey! Mr. Zhang, don't say that, I, Zhou Yuji, really take the matter of the kiln gang as my own business. Zhou Yuji said very sincerely, "I can still have such an opportunity in my life, and doing such a thing is my life's creation, and I will do my best to do it well." If there is a fight, if you say a word, I will get on the horse and leave. There's no fighting, I'll get things done here. ”

"In the entire Hetao area, we have nearly a million people one after another, right?" Zhang Zhimu asked.

"Yes! We emigrated a few of us, and the rest of us came by train. There are more and more people, most of them who have done a good job here, and they have come back to invite them, and I guess they have brought all the people from the village. They can't get a lot of money in a year in their hometown. After two years of working here, the poor can go home and marry a wife. The people value the benefits more. Zhou Yuji said.

"New immigrants must be taken care of." Zhang Zhimu said, "With them, our border defense in the north will be more stable." ”

"Rest assured, our immigration policy has not changed. Whether we invite or come by ourselves, the treatment is the same, and the subsidy should be given a lot. With a little silver, they can put down roots on their own. Zhou Yuji said.

"I'll tell you the truth, I'm going to finish the Jiangnan matter next year. When I returned, I was ready to solve the Liaodong problem. This matter is now handed over to General Jiang Pai for specific study. The Liaodong problem has been resolved. We need to prepare to settle the affairs of the Mongols in Mobei. In the second half of next year, your focus will be on organizing people to collect intelligence on Mobei. Prepare well in advance! Zhang Zhimu said.

"Great!" Zhou Yuji said: "Don't worry, I haven't relaxed to study them." There were quite a few Mongolian merchants who gathered information for us, so that we could compare what they said was not true. I've been looking forward to this day. As soon as possible, Mr. Zhang! ”

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Mt. Fuji erupted, Japan was earthquaked. --Progress of "Memories of the Southern Song Dynasty".