The Type 171 (White Shark-class) submarine has an original water displacement of 1,475 tons and an underwater displacement of 2,040 tons; 4600 hp on the water, 1350 hp underwater; Water 17.5 knots.

The diesel turbines, generators, and batteries originally installed by the little devils, with a total weight of 559 tons, are now all dismantled.

Replace the silent generator set "invented" by Bai Shujie, two electric motors, as well as a new battery and two brushless motors, a total of 668 tons, and an increase in weight of 109 tons.

The key is to rebalance it, otherwise once the submarine dives, I am afraid that it will not get up. Precise calculations, readjustment of the cabins, rearrangement of weapons systems, which took a lot of time.

Finally, after testing, after adopting the new technology "invented" by Bai Shujie, the fuel consumption of the diesel generator set is an astonishing 194 g/kWh, which is more than double the original 407 g/kWh!

That is, two 4,800 kW electric motors, running at full load for an hour, require 1.86 tons of diesel. After the modification, the Yi-171 can only carry 673 tons of fuel and can run at full load for 360 hours, that is, 15 days.

The engine is running at full load and can provide 9,600 kilowatts of power, that is, 13,000 horsepower, which is 7,000 horsepower more than the original little devil's power system of 6,000 horsepower!

After 9 nights of sea trials, the final number was finally obtained: the Yi 171, that is, the No. 1 ship of the White Shark class, has a maximum surface speed of 36 knots, a range of 12,900 nautical miles (24,000 kilometers), and a speed of 17,800 nautical miles (33,000 kilometers) at 25 knots.

The maximum underwater speed is 24 knots, the duration is 4.5 hours, and the range is 108 nautical miles (200 km), and the underwater maximum speed is 39 hours and the range is 270 nautical miles (500 km).

Of course, Bai Shujie knows that this is all theoretical, not that the improved submarine will be able to run 24,000 kilometers. Because when sailing on the sea, it is impossible to run in a straight line.

In addition, once the battle starts, it will inevitably be fast and slow, and it will keep going around in circles, avoiding enemy detection and torpedo pursuit, and it will burn high incense half the distance in a straight line if it can run out.

At the same time, after the battle, the submarine must also be "sometimes on the water, sometimes underwater; Sometimes forward, sometimes backward. "This is very power-intensive for the battery.

Overall, Bai Shujie is basically satisfied. There is no absolute security on the battlefield, and no matter how advanced the weapons and equipment are, there will be times when the gutter capsizes.

The Americans' F117 stealth aircraft is known as invincible in the world, but on the battlefield in Yugoslavia, it was not shot down by the oldest shoulder-fired rockets!

On the surface of the 36 knots, the general destroyers of the little devils may not be able to catch up, and the survivability of the battlefield has been greatly improved.

Although the maximum speed under water can only reach 24 knots, the current torpedoes can only fire directly, so there is no room for evasion.

The most happy thing for the submariners of the submarine group is that the noise problem of submarines has been completely solved.

Although the "silent generator set" is not completely silent, the ordinary humming sound, the "silencing tile" and adsorption material installed in the isolation cabin are basically like the feeling of walking on the street.

In addition, because the final propulsion is done by the electric motor, the vibration of the submarine is reduced to a minimum, the operation is more agile and lighter, and the maneuverability is more than doubled.

Bai Shujie's only regret is that he "plagiarized" the diesel engine and generator technology of later generations, but the fuel consumption could not meet the original design of 180 g/kWh.

It seems that the times are different, and the level of manufacturing technology and materials is always unable to keep up. Advanced design must have the same advanced processing technology, which requires time precipitation and accumulation, and there is no way to solve it for the time being.

With the success of the new battery and brushless motor, Bai Shujie finally breathed a sigh of relief, because the biggest problem of "torpedo transformation" was also solved simultaneously, and the rest of the work was to shrink on the basis of the big guy of the submarine. The size is reduced, the power is also reduced, and the weight is naturally reduced by hundreds of times!

Of course, the moment Bai Shujie saw the success of the brushless motor and the new battery, in fact, the earliest "whimsical" idea was: the submarine did not have anything inside, so it carried 1,500 tons of high-energy explosives, and then crashed into the Japanese archipelago.

On second thought, it was useless!

The Americans dropped two large firecrackers from the sky, both of which were 3 million tons of TNT equivalent, and the result was nothing more than the destruction of two cities. To completely destroy the Japanese archipelago, at least 8 atomic bombs with a yield of 10 million tons are needed!

However, this cannot be realized. Because of the explosion of a hydrogen bomb with a yield of 100 million tons, the earth will return to the ice age, and mankind will no longer exist.

In early May 1939, a telegram from Wang Xinlan made Bai Shujie uneasy.

It turned out that, according to the inherent history, the "Munich Agreement on the Far East" between the little devils and the British should have been on July 4, 1939, but now the situation has changed!

According to Wang Xinlan's telegram, it was speculated that the Anglo-Japanese preliminary agreement, known as the Arita Kleiki Agreement, should have been signed in mid-April 1939.

This agreement is the "masterpiece" of British Prime Minister Neville Chamberlain, who continued to sell China's interests after betraying Czechoslovakia!

The contents include: Britain recognized the de facto state of Japan's armed aggression against China, and stated: "The Japanese army shall not fail to stop or destroy any act or factor that prevents the Japanese army or is beneficial to the Japanese army"; and assured that "the British Government has no intention of sponsoring any action that would interfere with the attainment of the above aims of the Japanese Army." ”

Bai Shujie knew that because of his appearance, the Ministry of Foreign Affairs of the little devil had accelerated international steps. Next, the British are going to "implement the embargo against China" on the front line of Myanmar!

"Order: Immediate evacuation of the European Office from the UK! The three warships already on the high seas were to return immediately, and they must cross the Bay of Bengal and return home through the Strait of Malacca by May 22, 1939. ”

"Instruct the European office to make a statement before leaving: Feilong International Trade Group strongly condemns the obscene behavior of the British government! In order to protest against the collusion between the British government and the Japanese government and the shameless betrayal of China's interests, the trade relationship with the British government will be terminated with immediate effect! ”

"Once the British government unilaterally imposes an economic and military blockade on Burma, the Bay of Bengal, the Java Sea, and the South China Sea, it will be regarded as a declaration of war against China! The Wyvern Trading Group cannot guarantee the safety of British ships and personnel in the South Pacific, the South China Sea, the Java Sea, the Banda Sea, and the South Indian Ocean, and all consequences are borne by the British government. ”

On May 18, 1939, Wang Xinlan sent a telegram: "Pyongyang" cruise ship, 3 warships and 27 cargo ships have passed through the Strait of Malacca.

After reading the telegram, Bai Shujie immediately grabbed the phone: "Lu Yunlong: How many submarines have been renovated?" ”

"Report to the Commander-in-Chief: 3 White Sharks and 2 Shadows have been refitted." Lu Yunlong said on the phone: "There are still 2 Shadows that should be completed in a week, is there any task?" ”

"That's right, the international situation has changed dramatically recently, and the British and the little devils are in collusion." Bai Shujie briefly introduced the situation, and then said: "Our fleet has passed through the Strait of Malacca and has now entered the South China Sea, and I am worried that the British in Hong Kong will come out to find trouble. ”

"So I want you to send a formation, on the one hand, to conduct actual combat drills, and on the other hand, to prevent accidents. Because of the lack of enough sailors, the three large warships that have returned now are temporarily replaced by other sailors. How about it, with the current 5 submarines, do you have the confidence to go out? ”

"Report to the commander-in-chief: don't say 5 ships, even if it's 1 battleship, I'm going to go out!" Lu Yunlong said categorically: "Raising soldiers for a thousand days and using soldiers for a while, we have been raised for two years, and we should go out to see the world." ”

Bai Shujie: "Very good, 3 White Sharks and 2 Shadows immediately fill up the fuel to ensure that there is enough range." The new torpedo was hoisted as soon as it was delivered, and then waited for the order to attack! ”

After thinking about it for a while, he felt that it was not down-to-earth, Bai Shujie grabbed the phone again: "Qiu Shufen?" Are there any freighters under your logistics department? ”

"There are also 5 5,000-ton cargo ships and 3 15,000-ton oil tankers, what are the orders?"

Bai Shujie said with a smile: "Notify the Shipping Bureau, organize these ships, and set off to Cambodia in three days, exchange some sandalwood, coconut, rubber, and ababa with antibiotics, and bring back 3 ships of crude oil by the way." ”

Qiu Shufen began to complain on the phone: "We don't understand, everyone doesn't like to drink coconut water, why do you have to buy coconut every time?" Also, golden silk sandalwood, red sandalwood, ebony, we have shipped back more than 60,000 cubic meters, and we haven't seen you hit furniture, what are you going to do? ”

"Haha, coconut water is actually a good thing, you should do your best to get used to it." Bai Shujie said with a smile: "Let me tell you the truth, I need coconut shell made of zuò activated carbon, which is a necessity for purifying the air in the submarine, the submersible breathing filter, and the tap water evolutionary, which is a strategic material!" ”

"As for mahogany wood, it is a military supply, and it is very scarce. As you know, our aircraft carrier is coming back, and the upper flight deck is made of high-quality wooden planks. Without a large reserve of hard wood, how can we fight wars in the future? ”

"Also, if a fighter is mass-produced, the fuselage in the back can be made of wood. We don't have enough production capacity right now. When the technology is proficient, a large number of fighter jets can be produced to support the domestic war of resistance! ”

"It's a time of war, so naturally I don't make furniture. Grain, crude oil, rubber, copper and iron ore, and gold are all strategic materials that are in short supply. The Shipping Bureau and the Commerce and Trade Bureau under your logistics department must seize the opportunity to purchase as much as possible, and don't be afraid. ”

At two o'clock in the afternoon of May 21, 1939, five submarines left Jiaodao in the middle of eight freighters. At the speed of 18 knots, the fleet was able to explore Jeju Island at night.

By tomorrow morning, we should be able to reach the ocean east of the Zhoushan Islands. Tomorrow night just enter the Taiwan Strait, and feel the darkness to get guò, so as not to cause unnecessary disputes.

Because this was the first combat patrol of the Flying Dragon Expeditionary Force's submarine brigade since its establishment, Lu Yunlong, deputy captain of the submarine brigade, personally led the team.

He understood that this time the task was not to find trouble, but to avoid accidents as much as possible, and to take the fleet home to complete the mission.

The more you don't want to have trouble, the more things will come to you. The so-called plan is in people, and success is in heaven, which is the truth.

Bai Shujie planned very well, and Lu Yunlong was cautious enough. However, in order to show his existence and majesty, God always has to come up with something to make mankind increase his memory, and it will not satisfy everyone.

After all, what happens next, let's see how it will be broken down next time.