Now, the Dawen Empire has the technology to manufacture the hull of the submarine, the battery technology is there, and the only thing missing is the diesel engine, if it is the diesel engine of the cargo ship, the scientists of the Dawen Empire can make it with their hard work. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

The V12 engine used in tanks can be manufactured, and the W-type engine used in ships is not too difficult, but now, it is necessary to manufacture diesel engines for submarines, which is several levels higher!

The diesel engine used in the submarine is very demanding, first, it must be small in size and light in weight, the displacement of the submarine is there, you get a big guy of dozens of tons to go up, how to put other things!

Second, it is particularly important to be able to recharge the submarine's battery in a short period of time, and the diesel-electric submarine only has the opportunity to secretly surface at night, start the diesel engine, replenish the battery, and replace the oxygen in the submarine's cabin.

Of course, the shorter the better, at the same time, the noise is also as small as possible, you know, the sound in the water is how many times the distance of the air is how many times, the same is a hundred decibels, in the air may only spread one to two kilometers, and in the water, it can be extended to more than ten kilometers, if the Europa Empire has advanced listening equipment, it may be dozens of kilometers away to find the submarine of the Dawen Empire.

The diesel engine unit for submarines is the last problem in the manufacture of submarines in the Dawen Empire, and as long as this problem is overcome, the Dawen Empire has all the technology to build submarines.

With the birth of derivative models of CNC machine tools, the technology of CNC machine tools in the Dawen Empire is getting higher and higher, and the production capacity of the heavy industry of the Dawen Empire has been qualitatively improved, and this improvement is also all-round.

The most obvious is the use of steel in the steel industry. The new derivative model of CNC machine tools can manufacture more complex parts with high precision, and many parts on the steelmaking furnace that could not be manufactured can be manufactured smoothly.

The technical transformation of the steelmaking furnace has also started logically, and the effect of the transformation is still very good, and the efficiency has increased by 30%, which is just the transformation of a steelmaking furnace, if the steelmaking furnace of the Dawen Empire has made such a transformation, the cumulative improvement is extremely considerable.

Of course, this is just a good wish, after all, there are still many steel mills in the Dawen Empire, and the technology is too backward, and the annual steel output of these small factories is only tens of thousands of tons, and there is no value in transformation.

According to Li Rujin's idea, these small steelmaking plants should all be demolished, one is that the output is too low and pollutes the environment, and the other is to integrate the steel resources of the Dawen Empire and make the steel industry bigger and stronger, so as to meet the demand for steel for the strong economic development of the Dawen Empire.

But the huge Dawen Empire's market demand for steel is too hungry, and these small and undeformed small steel mills live a very nourishing life. Li Rujin secretly thought, let you jump for two years first, and when the iron ore from Australia is shipped back, there will be a time when you cry.

Just when Li Rujin was about to start rebuilding the steel plant, good news came from the Middle East, first, the Europa Empire failed to intervene in the Middle East, and the Arab world was already xenophobic.

However, when the Europa Empire tried to reach out again, it aroused the opposition of the entire Arab world, and even if the Europa Empire threatened to use force, it did not succeed, so the Dawen Empire became the only non-Arab country to enter the Arab world.

Second, the first batch of expeditions to the Middle East of the Dawen Empire troops have successfully gained a firm foothold in the Middle East and controlled a large sphere of influence, but the price paid is also relatively large, half of the strength of the two battalions has been damaged, of which more than 100 people have died, those fanatical believers in the Middle East, on the battlefield, that momentum, is completely deadly, even if the soldiers of the Dawen Empire have advanced weapons, it is very difficult to resist.

Therefore, now the expeditionary force of the Dawen Empire in the Middle East is in urgent need of supplies, especially weapons and ammunition, and now the soldiers of the Dawen Empire can gain a firm foothold, completely relying on the advanced weapons to defeat those fanatical believers.

Without the support of weapons, the soldiers of the Dawen Empire might not be able to defeat those fanatical believers.

In the cabinet conference room, the emperor of the empire, the elders of the cabinet, the marshal of the military department, and the darling of the empire, Li Rujin, gathered together to discuss things in the Middle East.

The topic of the meeting was twofold: first, how to provide support and supply to the Middle East. Second, how to open up the Indian Ocean sea lane.

The oil in the Middle East, it is impossible for the Dawen Empire to give up, and the Dawen Empire will definitely bite this piece of fat in its mouth, even if it is choked, there is no doubt about it.

The sea route is now impossible, and the only hope is to supply by land, but the problem now is that the first expeditionary force is in urgent need of supplies, and how to deliver supplies to the Middle East in a short time.

What is the fastest transportation, it must be airborne, but the transport plane of the Dawen Empire does not have such a strong endurance, even if it takes off from the border of the Dawen Empire, it cannot reach the Middle East at one time, and the battery must be replaced once or twice during this period.

Although the countries passing by land have agreed to the Dawen Empire to take the route, whether they are willing to open their airspace and open airports will continue to discuss, in fact, the Dawen Empire is a little too much, these countries may not even have planes, and that airspace right is just a decoration.

The trouble is that these countries may not even have airports, and the Dawen Empire only needs to choose a suitable country to negotiate and build an airstrip.

The problem of supply can be said to be temporarily solved, although for these supplies, the Dawen Empire has to pay a relatively high price, but as long as it can be solved with money, it is not a problem for the Dawen Empire.

The transportation of troops is a headache, and thousands of soldiers will also be transported by plane? If you think about it, it's not impossible, isn't it? The Gray Goose Transport Plane of the Dawen Empire can carry four tons at a time, and it is no problem to transport forty soldiers at a time, right?

Forty at a time, four hundred at a time, four thousand soldiers at a hundred times, this, there can really be. The planes of the Dawen Empire are electric, and the price of one flight is not high, and hundreds of flights are just a few hundred battery replacements.

This matter was thus decided, and inadvertently, the Dawen Empire made the first long-range force projection operation, and the military value of this long-range force projection has not been noticed by anyone for the time being, including Li Rujin.

It wasn't until afterwards, when people looked back at the incident, that they realized that the Dawen Empire had already possessed the ability to project long-range troops.