Although the meeting of the staff of the Europa Empire did not have a definite result, it was certain that the Dawen Empire had a mysterious force that manipulated the Dawen Empire behind the scenes, so they ordered the intelligence department to increase the infiltration of the Dawen Empire, and they vowed to find out the black hand hidden behind the Dawen Empire. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

Although the Dawen Empire and the Europa Empire are in a state of hostility, they are still in a period of relative peace, and there are still contacts between the people, and the Dawen Empire has three treasures: tea, porcelain and silk, which still have a very good market in the Europa Empire, and can bring a lot of foreign exchange income to the Dawen Empire every year.

The spies of the intelligence department of the Europa Empire began to infiltrate the Dawen Empire through these channels, and the merchants of the Europa Empire brought a few more entourages, which is not surprising.

It is likely that one or two of these entourages were intelligence officers from the intelligence services of the Europa Empire, but the movement of these intelligence officers in the Dawen Empire was too restrictive, and the distinction between the white and yellow races was still too obvious.

If the intelligence personnel of the Europa Empire want to succeed in the Dawen Empire, they must develop local intelligence personnel in the Dawen Empire, and the best and most practical way is to go on the offensive with money.

It doesn't matter if you are loyal, it's just that the price of betrayal is not enough, when the Europa Empire sacrifices money, a primitive and effective magic weapon, there will still be people from the Dawen Empire who can't resist the temptation, betray the Empire, throw themselves into the arms of the Europa Empire, and become traitors to the Dawen Empire, leaving a stench for thousands of years.

It's just that now the Europa Empire can't reach the middle and upper levels of the Dawen Empire, just some low-level intelligence officers, and if they want to get the information they want, the intelligence personnel of the Europa Empire still have a long way to go.

But the Europa Empire couldn't wait, and the General Staff allocated a special fund for the bribery of officials of the Dawen Empire, striving to get the information they wanted as soon as possible, and get rid of the black hand behind the Dawen Empire as soon as possible.

Li Rujin is now in the research institute of the military department, and he is concentrating the scientific and technological personnel who originally developed tank engines and has begun to carry out research and development work on engine units for submarines.

I didn't know that because of some of my actions, it directly or indirectly affected the military strategy of the Dawen Empire, which caused panic in the Europa Empire, and began to increase the infiltration of the Dawen Empire, vowing to find him.

The principle of V-type engine and W-type engine is the same, but the structure is more complex, especially the crankshaft of the engine, whether it is design requirements, work requirements or processing requirements, are incomparable to the crankshaft of V-type engine.

In addition, the particularity of the use environment of the submarine engine unit requires that the various indicators of the engine are required to be high and strict, so that the research and development of the submarine engine unit is difficult from the beginning.

From the beginning of the establishment of the model of the W-type engine, it gave the scientists of the Dawen Empire a headache, after all, the W-type engine is not simply a combination of two V-type engines in parallel.

Li Rujin did not think of directly installing the V-type engine on the submarine, but considering that the voyage from the South China Sea to the Indian Ocean from the South China Sea of the empire was long, the requirements for the submarine were quite high, especially the endurance of the submarine, which was the most important thing.

Therefore, Li Rujin considered the development of the W-type engine unit, after all, the W-type engine is much higher than the V-type engine in terms of efficiency, power, and other comprehensive indicators.

Li Rujin made up his mind that the W-type engine used in submarines must be developed, and in addition, the W-type engine can also be used in other large surface ships, whether it is military or civilian, it has a very wide range of applications, and the future is bright.

At the same time, Li Rujin also changed the design of the submarine's hull, originally Li Rujin wanted to copy the German U-shaped submarine in the previous life, and then thought about it carefully, so many new technologies and new technologies are not applied to the submarine, it is simply a crime, Li Rujin and his team worked hard for a few days to redesign the hull of the submarine.

The teardrop-shaped object in the water is the least resistant, Li Rujin did not hesitate to design the shape of the hull to resemble the hull of the droplet, considering that the submarine has to travel long distances, the displacement is increased from about 800 tons to 1200 tons.

Increasing the displacement of the submarine has indirectly increased the net load of the submarine, which can carry more supplies, and the weapon system has also been increased from the original four 533 torpedo tubes to six torpedo tubes, with four in the front and two in the rear. The carrying volume of torpedoes also increased to 24 pieces.

As for the production of special steel for submarines, after the technical transformation of the Dawen Empire steelmaking plant, it can already be mass-produced, although the output is still insufficient, Li Rujin is confident that after several more technical transformations of the steel mill, the output of special steel can be fully expected to be raised to a new height.

It can fully meet the amount of steel used by six submarines in the Dawen Empire a year.

The output of six submarines a year is also estimated by Li Rujin based on the current industrial level and actual situation of the Dawen Empire, and although the shipbuilding level of the Dawen Empire cannot manufacture the technology of large surface ships of more than 10,000 tons, there is no technical problem in manufacturing submarines with a displacement of only about 1,200 tons.

Except, of course, engine technology.

Six ships a year, and three years later, with the improvement of the technical level, this production capacity can be increased to eight or even more than ten, then the Dawen Empire may have more than 20 submarines.

Twenty submarines, which is already a fairly powerful combat force, may not be able to defeat the naval forces of the Europa Empire, but it is estimated that there is no problem in blocking the naval power of the Europa Empire in the Indian Ocean.

If he wanted to defeat the navy of the Europa Empire through submarines, Li Rujin never thought about it. But there is still hope for using wolf pack tactics to drive the Imperial Europa Navy out of the Indian Ocean.

It really doesn't work, using these submarines, it's no problem to control a waterway in the Indian Ocean, to ensure the safety of traffic in a waterway, this point, so many submarines should always be able to do it.

As long as the traffic safety of a waterway can be guaranteed, a steady stream of oil from the Middle East can be transported to the Dawen Empire.

The construction of the submarine began, and the training of the operators on the submarine also began at the same time.

After all, submarines are different from other surface combat ships, it completely relies on its own stealth type to attack, and the way of attack is mainly sneak attack, you can't expect a submarine to surface and attack each other with torpedoes and surface warships' naval guns.

Due to the particularity of submarines, the requirements for personnel are also different, whether it is physical fitness, technical requirements or even mental requirements, the difficulty of training is also greater, so it is urgent to train relevant combat personnel.

Otherwise, it will be embarrassing when the submarine is manufactured, but there is no supporting combat crew!