The battleship plan proposed by Xie Zhangtai is not at all useful in the face of reality, and the affairs of the navy cannot be solved in a short time, even if the troops have a new look after two years, whether they can build a battleship that is stronger than the King Kong within two years, not to mention, it is built, and those Manchu navy that have only played cruisers and have not fought for more than ten years will operate battleships? A battleship needs more than 2,000 people, and a cruiser with a few hundred people can't manage it well, but more than 2,000 people can manage it well?

After discussing some diplomatic matters, Xie Jintai went disheartened, Yang Rui arranged a carriage to send him back, while he stayed in the staff headquarters to discuss other matters. For example, the battle plan: D.

"According to the report of the German submarine staff, the newly built German submarine No. 19 has been launched, and they believe that this should be the best type of boat for sabotage warfare. The boat has a displacement of 650 tons when floating, an underwater displacement of 837 tons, a depth of 50 meters, two two-stroke diesel engines, providing 1,700 horsepower, two electric motors, providing 1,200 horsepower, a combat distance of 18,000 kilometers, and a speed of 15.4 knots on water and 9.5 knots underwater. In terms of weapons, there were two 50-centimeter torpedo tubes in the bow and two 50-centimeter torpedo tubes in the bow and submersible stern, and the whole boat carried six torpedoes, as well as an 88-millimeter deck gun with 220 rounds of ammunition, and a Maxim machine gun with 5,000 rounds of ammunition. There were four officers and a crew of twenty-seven. ”

Bei Shoutong finished reading the original number of the No. 19 submarine, and then took to the next page of the text, "The staff group has made many modifications to the original submarine in accordance with our tactical requirements and technical conditions. The tonnage above water was reduced to six hundred and twenty tons, and the underwater tonnage remained unchanged; Replace our own diesel engines with 1,800 horsepower, and then install a temporarily usable supercharger. Then the horsepower can also be increased to 40 percent, to 2,700 horsepower, so that the maximum speed of the submarine on the water can reach 18 knots, and the underwater speed will remain the same, but after replacing our batteries, the battery capacity will increase by 50 percent, that is, sailing at three knots. Electricity lasts twenty hours, and the maximum escape distance is one hundred and ten kilometers, if sailing at maximum speed. Then the power can only last for two hours, and the escape distance is thirty-six kilometers. In terms of weapons, there were no major changes, but the torpedo tubes had two in the front and two in the back to four in the back, and the number of torpedo equipment was also changed to twelve.

The staff group believes. This type of submarine has the ability to carry out a sabotage battle on the sea line of communication. But to blockade Japan, a huge number of submarines were needed, and because we did not have a sea advantage, they also designed a submarine carrier, mainly to replenish the sabotage ships with diesel and fresh water, which had a displacement of 1,600 tons and could carry more than 700 tons of oil. It is powered by two diesel engines with a horsepower of 3,000 hp under supercharging, but because of the large tonnage. So the speed is slower, fourteen knots on the water. Six knots underwater, with a range of 20,000 kilometers. Because there was no need to fight, the boat was not equipped with torpedoes, only a 37-mm deck gun. Because of its large tonnage, the construction period of the boat was longer, about a year, and the cost was 9 million marks. ”

After the number of submarines was introduced, Yang Rui looked at the model brought by Germany, rubbed it for a while, and then said: "How is the attack plan decided now?" What should we do? ”

"The concrete plan has been made." Xu Jingxi took out another document from the secret folder and said, "The plan is the integration of sea and sky." There are two specific arrangements, one is the combined use of airships and submarines, the airship is responsible for the reconnaissance of the sea surface situation, and after discovering the target, it uses radio to direct the submarine to act, because the airship stays in the air for a long time, it can stay on the main route for a long time, we calculate that an airship can command ten to fifteen submarines to fight, and in the case of Japan, eight to ten airships can basically control the route; The other is to let the supply submarine carry a seaplane and use the aircraft for reconnaissance, but because the aircraft is in the air for a short time, this is actually a backup plan, mainly because of the frequent storms at sea and the weak wind resistance of the airship. ”

"How many submarines will it take to achieve the effect of the blockade? And how effective would such a blockade be? Yang Rui asked.

"In light of the situation in various aspects, and judging from the current volume of merchant ships in Japan, at least one hundred submarines are needed, which is considered a loss, and for the sake of prudence, we believe that one hundred and fifty submarines should be the best, and the shipyard should also have a supplementary capacity of forty submarines per year, which is an attack submarine; Supply submarines, because the voyage between China and Japan is very close, we calculate that ten supply submarines are needed; And to control zhì airships, twenty ships are needed as a rotation. After Xu Jingxi finished talking about the number calculated by the General Staff, he said the effect, "At present, Japan's foreign trade volume is nearly twice that of China, and last year it exported more than 700 million yen of goods and imported more than 800 million yen. Among them, the main exports are raw silk, cotton yarn, silk fabrics, cotton cloth, copper and coal; The main imports were cotton, pig iron, grain, soybean cake, machinery, and sugar. Xu Jingxi said.

"Once Japan's foreign routes are blocked, then Japan's domestic light industry will come to a complete standstill, and its largest cargo market will no longer be domestic, and most of the raw materials will be abroad, and cotton and pig iron will need to be imported from abroad, so the economy will collapse as soon as the blockade is made. In addition, the blockade will also produce two strict problems, the first is that raw silk has always been to be in the year, once the route is blocked, the value of raw silk will drop sharply in the blockade for a year, and raw silk is the largest export profit in Japan, and its profits will decline, then the domestic silkworm households will suffer huge losses, and the bad debts caused by the sericulture industry will implicate the entire national economy, and the danger is far-reaching;

Second, Japan's annual output of rice is only 9 million tons, wheat is 800,000 tons, and barley is 2 million tons, and its annual grain output is more than 11 million tons, but the amount of grain needed by the 5,000 people is much greater than that, so Japan's annual grain imports are extremely huge. Fifteen million tons are needed in a rough calculation, and even if the rationing is implemented, and at the same time, barley, which is not usually eaten is used as a staple food, there is still a food shortfall of 3 million tons.

In addition, our survey found that Japan's annual grain production has increased by 8 to 10 percent after using soybean cake, that is, if Japan does not import soybean cake, if there is no alternative fertilizer, grain production will drop by 10%. In addition, after the meat and fish goods in Japan are cut off, the food shortage will be even greater. Even if the fields of Japan are planted with food. At most, production will remain at pre-war levels, and if the lockdown continues for three years, the entire Japanese economy could collapse......"

What Xu Jingxi said was relish. Seems to can't wait to get there. Yang Rui knew the consequences of Japan's blockade, but how much would it cost him to do it again?

The current cost of 200 submarines is 290 million marks, or 70 million US dollars, and this is only the cost of construction, equipment, training, and especially torpedoes. If you want 30 pieces per boat, you need 6,000 pieces, and even if you buy them in bulk, you will probably need 30 million dollars. All this mess adds up to an estimated $120 million. More than 150,000,000 taels of silver...... Yang Rui was suddenly taken aback by the number calculated silently, this is more expensive than buying a battleship, two thousand battleships, this can buy seven or eight! But then I think about it, it's a national war. Compare the billions that Japan spent on the Russo-Japanese War. That's a lot. The navy has gone down with 200 million taels here, so how much does the army need? I'm afraid it will cost more than three or four billion.

Yang Rui was a little distracted here, and Xu Jingxi only found out that he was like this after speaking, but as soon as he stopped talking, he pulled his thoughts over and continued to ask: "Two hundred submarines are worth a lot of money, with current estimates, is there really no way for the Japanese to deal with them?" Aren't they talking about three or four airships now? Airplanes are also being studied, and their fleet had submarines several years ago. Will they send those submarines out, or will they simply build more submarines themselves to fight us underwater? ”

Yang Rui only mentioned the plan of the submarine blockade of Japan before, and the general staff and the submarine group on the German side thought of the plan according to his ideas. In fact, as far as the history he knows, there is really no good way to deal with submarines in World War I, the planes at this time are not good, and the radar is not visible, and in the end it seems that the British came up with the escort system, and Germany has not yet wolf pack tactics of the wolf king, which finally failed.

Yang Rui knows a limited amount, in fact, he has not seen the history of World War II, at the beginning of World War I, submarines were fought by single boats, and merchant ships came to kill one, and after the British listened to the Americans' construction, they began to adopt the method of escorting merchant ships in formation, reducing the losses from one-quarter to one-hundred-twentieth, and the wolf king Dönitz thought of a way to deal with the merchant fleet after being captured, that is, the submarine group attacked the merchant fleet at night, the way was right, but when he got out of the prisoner of war camp, the First World War was over.

At the beginning of World War II, Dönitz sacrificed the wolf pack tactics, which were very effective at first, but after the radar of the escort fleet was improved to the centimeter band, the detection accuracy increased greatly, and under the suppression of the aircraft, the submarines completely emerged to kill one another, and when the German finally installed the snorkel, it was very late, and the escort aircraft carriers were everywhere, plus the bombing formations of the US army, the production of submarines was blocked, and the submarine forces fell into the fate of World War I.

As with the situation faced by submarines, the equipment of submarines also varies with the different enemy situations, starting with small submarines, and then with the birth of the escort system, submarines can only find attack opportunities by going farther and waiting more, so the submarines of World War I are getting bigger and bigger, and the equipment of deck guns is because shells are much cheaper than torpedoes, and the shells of a single merchant ship can be solved by shells of tens of marks, so do not use torpedoes of one or two thousand marks. From this period to the advent of aircraft carriers equipped with centimeter waves, submarines were all submersible gunboats, and only after the submarine was equipped with a snorkel did it really become a 'submarine' boat, and the underwater speed began to be greater than the water speed, and its whereabouts became mysterious and never visible.

Yang Rui used wolf pack tactics to teach his subordinates at the beginning, and now the air-sea integration studied by the General Staff is a re-innovation along his line of thought, and the empire can't think of a way to deal with submarines, so Japan doesn't know how to deal with wolf pack tactics that only appeared decades later. Yang Rui had wanted to add a snorkel to the submarine before, and the real room had also made technical reserves, but the General Staff vetoed this, and they did not think that there was a threat to the sky if they had never seen aircraft carriers, planes, or radars, but only that the Japanese submarines would pose some threat to their own side.

"Sir, according to intelligence, Japan's early submarines were only a few dozen tons, so those ships and ships did not have the ability to go to sea at all, and the technical performance of the latest submarine Wave III was also very bad, the water displacement of the whole boat was only 290 tons, and the underwater displacement was 320 tons, and the gasoline engine was used, the horsepower was only 600 horses, and the endurance was also short, only 1,100 kilometers, and the torpedoes were generally equipped with two, and there was no artillery. I want to use their ability to move underwater, if the two sides meet face to face. I'm afraid it's going to be an artillery battle. Xu Jingxi said it was funny, but when he saw that Yang Rui didn't laugh, he quickly got up again.

Yang Rui didn't smile because he thought of a submarine accident in Japan the year before last, a Japanese submarine of less than 100 tons was flooded because of the snorkel of a gasoline engine. caused it to lose its balance, and after losing power, it sank to the bottom of the sea. After the submarine was salvaged a few days later, there was no scene of fighting for survival when the Italian submarine was wrecked a few years earlier, and all 14 crew members performed their duties, and its captain, Sakuma, wrote a detailed accident report at the last moment of his life, and then died peacefully.

Look at the Japanese navy, and then compare it with the navy left behind by the Manchu Qing Dynasty. Yang Rui was speechless, and in the Renaissance Navy trained in Germany, although there were no such accidents. But he wasn't entirely sure if he would be able to do his duty in a similar situation, he only hoped that they would, after all, most of those people were teenagers.

"The Japanese are, after all, in the near sea. If the cruiser searched on the surface of the sea. Underwater search for submarines, what do we do? Yang Rui asked. In the absence of aircraft radar, he was worried about Japanese submarines after watching too many submarine warfare movies.

"Sir, our sonar can now be equipped with submarines, and the side positioning system is also being developed, which can completely deal with Japanese submarines." Bei Shou is the same way. He looked at Yang Rui with admiration, and only thought that Mr. was like a god, and he had already arranged a thing.

Yang Rui is actually not as godly as he thinks. It's just that he knows about sonar. And in real history, the British hired the Frenchman Langevin to use crystal as a medium in 1918. The piezoelectric transducer was invented, which converted the acoustic signal into an electrical signal, and then amplified it through a vacuum amplifier, which led to the emergence of simple sonar. The sensor room set up by Yang Rui takes the chapter on physical sensors in high school as the research object, and then dismantles and analyzes the speaker and headphones of the repeater, and is already studying the electret body. Of course, piezoelectric ceramics cannot be studied now, and the real room is still the old road of Langevin, according to the 1880 Curie brothers' piezoelectric effect research continues to deepen, and within a few years, Langevin vibrator has been made.

"But that can only be done by stopping the ship to detect, and the distance is too close, only 1,500 meters." Yang Rui was not satisfied, the real room is now only overcoming the difficulty of sound and electricity exchange, in actual use, sonar personnel still can not effectively judge the direction and distance of the enemy ship when their own submarines are moving, because the sound is always mixed together, the compensator of passive sonar in later generations, I don't know when it can be invented; As for the detection range, submarines in later generations generally used magnetostrictive transducers to emit sound waves, while piezoelectric converters were used to receive echoes. The magnetostrictive effect was discovered by Joule in 1842, but there is still a long way to go to achieve it.

"Sir, if the ship is stopped, according to the position of the enemy boat, through the multiple receivers on the side of Guò, an experienced sonar can still judge the distance and direction, in addition, the real yàn room has developed a new weapon, if the submarine is equipped, it will definitely be able to hit nine out of ten." Bei Shoutong said, after he finished speaking, he picked up the phone and said outside, and then closed the window again, and the room suddenly became dark, and Yang Rui knew that he was going to show himself a movie.

In a few moments, the projection hole at the back of the war room opened, and the projector's light soon hit the wall that covered the map, and on the stretched white cloth, a film began. At first, there was a wide and gentle surface of water, and the roar of diesel engines could be heard in the sound of electric horns. As the camera shifted, a huge sailboat appeared on the water, the boat was thousands of meters away from the camera, and at this time, Yang Rui knew that the camera was on the boat, and the sound of the diesel engine was not from the sailboat in the distance, but from the boat under the camera.

There weren't too many shots, and the show began when the camera could capture the torpedo tubes underfoot. With a 'put' sound, a torpedo jumped out of the side of the ship and into the water. Unlike ordinary torpedoes, this torpedo has no air jets coming out of its tail, and is marked only with a small red flag, which quickly pulls a clear trajectory on the water.

The torpedo went forward, and after the sailboat in the distance spotted the torpedo, it began to move left and right, and slowly pulled out an angle with the torpedo trajectory, and it seemed that it could escape the torpedo's attack range. But just as the sailboat was getting farther and farther, the torpedo bent like a fish, left the previous direction, and rushed to the vicinity of the sailboat, perhaps because of the sharp turn, and after a while, it made a small turn, corrected its direction again, and finally caught up with the sailboat, but this was obviously true, and the torpedo did not explode at all.

The torpedo did not explode, but Yang Rui's heart exploded, is this a self-guided torpedo at all, he has seen it in the movie of submarine warfare and in the novel describing submarines, but that is the computer age, what is wrong with this self-guided torpedo now, is it really like God's help?!

"How did you make this self-guided torpedo?" Yang Rui was stunned for a while and then suddenly asked this sentence, which only made Pei Shoutong and Xu Jingxi's eyes light up.

"Sir, this ...... Anyway, when the real yàn room reported it, it said that it was a turning torpedo. Bei Shoutong touched his head, he felt that Yang Rui's name was still good. The principle is the same as that of sonar, that is, the sound signal is converted into an electrical signal, and then the direction of the torpedo is controlled by the electric signal, and the loud sound on that side goes to that side. ”

"It's loud over there, go that way?" Yang Rui was puzzled, he didn't study liberal arts, so he couldn't understand the mystery, "I thought it was a wire guide." He subconsciously said, and his heart jumped again. Yes, it doesn't matter how the self-guide is done, but isn't the line guide very simple? Wouldn't it be nice to watch the torpedo go and then shake the joystick?

"Wire guide?" Bei Shoutong and Xu Jingxi were shocked when they heard this, they wanted to surprise Yang Rui, but they didn't expect him not only not to be surprised, but also to say something else, which looked like the same thing as the torpedo that was turning now.

In fact, the sensor is really worth the money, its value is to humanize the weapon, although it is still very humane, but at least it is much smarter than those dead things, and the role of the sensor is to convert force, light, sound, pressure, temperature these things into electrical signals, as long as they can be converted into electrical signals, then they can be converted into power, and this sound guide torpedo is also the same principle.

However, because the piezoelectric converter is made of crystal, and each torpedo is equipped with two, to form two coils - the left sound sounds, then the voltage of the left coil is strong, the voltage of the two coils is different, and the angle of the vertical rudder is also different, which makes the torpedo turn to the left side with a large voltage; If the sound on the right side is loud, then the coil on the right side has a strong voltage, which makes the torpedo turn to the right; When the voltage of the coils on both sides is equal, the voltage difference is zero, the vertical rudder does not produce a rudder angle, and the torpedo keeps moving forward -- this makes the torpedo extremely expensive, otherwise, it is completely possible to install two more induction coils on the torpedo, so that the torpedo can not only automatically turn left and right, but also automatically turn up and down, which is a sharp weapon for dealing with submarines.

"Sir, because this torpedo uses a large piece of crystal as a converter, and also uses a battery, it is estimated that it will cost at least 56,000 taels, which is eight or nine times that of an ordinary torpedo." Xu Jingxi said, "In fact, the real yàn room also invented a kind of sound guide mine, which is cheaper than this, it uses toner on the phone, but also uses a battery, as long as there is a big ship, it can automatically float as soon as the sound shakes, and then explode next to the big ship." ”

"I understand, I understand!" Yang Rui's heart was agitated, and he felt that people like the real yàn room were finally used on top, and his brain was not as dead as he thought before, and the sound-guided torpedo plus the voice-controlled mine really wanted the Japanese to drink a pot, "Who made this?" I want to meet him! Yang Rui said again.

"Sir, this person is in Germany, and the problem of diesel engines is said to have been solved by him. You can't see it anymore. ”

"Oh! I know, it's Rao Yutai! Yang Rui whispered, the voice can only be heard by him, the coupling of the diesel engine oil pump is also polished with the change of the current coil, and many times I have to admit that some people have a few more grooves in their brains. Since you can't see it, then give it a reward! China, we still need to run education, we still need to run education! ”

Seeing that those who talked about the war against Japan actually talked about education, Pei Shoutong and Xu Jingxi smiled and said, "Sir, let's talk about the war first, knock out some of the Japanese fleet, and then blockade Japan, and the battle will be easy to fight." Now our assumption is whether we can send submarines at the beginning of the war...... Self-guided torpedoes first knocked out some Japanese warships, and at the same time laid mines on a large scale in various ports in Japan, and finally blockaded Japan and forced Japan to surrender! (To be continued......)