As far as the technical department is concerned, the German submarines brought seventy or eighty pieces of technology to the Pixiu and the Instigation. One of the most important is that the fuel of the German submarine is stored between the shell and the ballast chamber, and the device is clever enough not to produce unnecessary buoyancy due to fuel consumption, nor to affect the sinking and floating of the submarine, but it is not complicated.

This technology is a big improvement for the submarine of the Maritime Resistance Army, with a displacement of more than 2,000 tons, it is difficult to carry 300 tons of explosives, while the Germans can carry 200 tons of guns with a submarine of 1,200 tons. Although it was also crowded, the German sailors had almost nowhere to stand, and even the command compartment was cargo. But it is enough to explain the advantages of such an oil depot arrangement. If the Pixiu can adopt this arrangement, the space inside the submarine will be greatly increased, the endurance will be increased, and the incubation time of the Pixiu in the water will be extended.

In addition, the oil depot is outside the ballast chamber, which is also safer for submarines.

However, on the whole, the surname of the German submarine can not be as good as that of the Naval Resistance Army, which is quite far behind. For example, the weight of the battery on the Pixiu submarine reached 600 tons, which could make the submarine sail silently underwater for three days. However, Germany's 1,200-ton submarine battery is only 60 tons, and even if Li Guang's battery is modified, it can only maintain a low-speed voyage of more than 10 hours. As for Li Guang's improved sonar and appearance, the German submarine is still very primitive. And the biggest secret on the Pixiu - the snorkel for the supply of diesel engines for underwater navigation of submarines, the Germans have not yet thought of it.

However, German submarines have an advantage, or a disadvantage. The interior of the German submarine was poorly furnished, and life inside was inferior to that of the Pixiu. However, space is saved and people flow more smoothly.

This reminds the Instigator a lot, a thousand tons of displacement, many of the equipment that seemed necessary on the Pixiu, can be reduced on the Instigator.

This point is actually Li Guang's fault, or the fault of modern people, the concept of putting people first is not the most important thing in war, and combat effectiveness is the first place. Li Guang paid too much attention to the auxiliary facilities in the design of the submarine, and it was a pity for Li Guang for a long time if the toilet was not well designed, and the American submarine that the Pixiu referred to actually paid more attention to the auxiliary living facilities.

Lippmann gained greatly from German submarines, and also admired the industrial level of the Germans, and the strength of German industry can be seen from just a small place. Lippmann saw a weld in the submarine, more than ten meters long, without a single patch. That is to say, the weld of more than ten meters long, the Germans once passed the welding. At this level, not even a single person can be found in Li Guang's shipyard and submarine factory. Li Guang can only be envious, jealous and hateful about this.

In fact, the Maritime Resistance Force learned far more than these dozens of things on German submarines, and the Germans' manufacturing process was very rigorous, and the handling of some details was amazing.

Another big gain is that the Germans' small submarine of more than 300 tons is not advanced at all, but the overall arrangement is excellent, which is of great benefit to the next plan of the Naval Resistance Force.

At the beginning, Li Guang built the Pixiu submarine, and the reason why it was designed so big was that it was located in Uruguay, and it was far enough to run to the coast of China, and it would definitely not work if it did not have enough endurance.

Now the 1,000-ton class is used to build the Instigator submarine, and the reason is that the base is on Shixiang Island, so there is no need to think too much about endurance.

But at the sight of the German three-hundred-ton submarines, the Maritime Resistance Forces again found a benefit, small.

For example, the Pixiu passed through Weizhou Island in the Beibu Gulf several times, and the military port where the army was stationed was actually quite easy to sneak attack, and the guards were definitely not tight. But the water depth was only ten meters, and the huge body of the Pixiu could not be hidden.

If it's a small submarine, a sneak attack is definitely not a problem.

There are actually many ways to solve the endurance of small submarines, supply ships, or stockpiling diesel on a desert island like Ren Tianyang.

In general, the Germans were more suitable for small submarines, after all, the Atlantic Ocean was still a slim ocean compared to the Pacific Ocean, and the range did not need to be very far. But for the Maritime Resistance Force, large, medium and small submarines are necessary.

The Germans gave Li Guang a wake-up call, and the 500-ton submarine immediately entered the plan. The design was completed by Lippmann and a group of Chinese designers, and many of the technical improvements were obtained from the Germans.

This small submarine was named the Fox Spirit, in which the power used a diesel engine developed by Li Guang, and the arrangement was in the form of four units in two and two in parallel. Don't look at this diesel engine is 400 horsepower, but it can only be used as 300 horsepower when used as a boat, so it seems to be overpowered, but in fact it is not too strong. The advantage is that it can be fully loaded in case of emergency, and the surface speed will reach 256 knots in a short time.

Noise, on the other hand, is the biggest improvement, without deafening.

Li Guang's business was very profitable, but the Germans also retaliated against Li Guang. The reason is that the output of the artillery factory is too low, and it will not be able to produce the 20mm cannon equipped with the fighter for a while. Li Guang bought 200 cannons and 200,000 shells from the Germans.

The Germans actually sold this 20-kilogram machine gun for 1,000 dollars each, and Li Guang paid a ton of batteries to exchange for three machine guns. And this kind of small cannonball, the Germans asked for three dollars a dollar, and the distressed Li Guang bared his teeth.

This is a small cannon, which can fire two or three hundred rounds in a minute, which means that as long as you pull the trigger, it will cost dozens of dollars to go out, expensive, very expensive. However, this small cannon of the Germans, with one tracer bullet every five rounds, was very well considered and very suitable for combat. It is still a big reminder to the production of anti-aircraft artillery shells for the Naval Resistance Army.

This business greatly helped Li Guang's finances, and even more so for China's war of resistance.

Later, the battery factory increased its equipment and opened three shifts, with a maximum output of more than 500 tons per month. And such a large production volume turned out to be difficult to meet the needs of the Germans.

After May '40, the battery factory turned out to be the most profitable of all Li Guang's industries, generating more profits than a shipyard with thousands of people.

In order to open up the market, Li Guang's enlightenment to the Germans has played an incredible effect. Based on Li Guang's remarks, Claude actually wrote a report entitled "Breaking Mathematical Problems in Engagements", in which the pocket battleship Count Speese was used as an example to compare the results of submarines, and even proposed a new term -- tonnage warfare. In the report, Claude estimated that if 300,000 tons of British merchant ships were sunk every month, Britain's own shipbuilding capacity would be depleted. If 400,000 tons of merchant ships were sunk per month, the entire shipbuilding capacity of Britain and France would be consumed. If it can sink 700,000 tons, then it can consume the shipbuilding capacity of the United States plus Britain and France.

Claude stated in the report that Germany only needs to maintain the scale of 300 submarines in the Atlantic, which means that as long as Germany has 1,000 submarines, it can completely defeat Britain within two years.

Claude himself was a naval officer and used to work in the logistics department, and under the inspiration of Li Guang, he actually made the submarine theory of Dönitz, the most famous German naval commander in World War II, come out early.

As soon as this article came out, it immediately won Dönitz's appreciation, but Dönitz was not the commander of the Navy at this time, and the commander was still the commander of the cannon giant ship faction. However, when Dönitz handed over the report to Hitler, he immediately gained support.

The number of VIIC submarines that Germany is now building immediately tripled. In fact, most of the so-called U7 submarines seen in later movies and television are actually this one, this submarine produced a total of nearly 600 submarines in World War II, and it is still the largest submarine in production until the 21st century.

The unknown Claude has since risen to prominence in the German Navy, and even left a great name in history, which Li Guang did not expect. However, the early expansion of German submarines brought huge economic benefits to Li Guang.

Another benefit that Claude brought to Li Guang was that the sailors on the German Count Spee, who did not return to China to participate in the war, entered Li Guang's shipyard to work at least 200 people, although these people were not designers, but they were familiar with battleships and provided many good ideas for Li Guang's warship design. More than a dozen of them became Li Guang's guests, and often gave lectures to the officers of the Naval Resistance Army. The rookies of the Maritime Resistance Army gradually matured.

The Germans' submarine attacks became even more frenzied after the battery was improved, which gave Li Guang a sigh of relief--- Nauru Island was controlled by British warships in February, cutting off the supply of guano business groups. Fortunately, Li Guang turned his business direction to renovate old ships and sell them at a higher price, otherwise it would have been possible to follow in Laplace's footsteps again and be run on by depositors and go bankrupt. Even so, it brought a lot of trouble to Yuan Ran.

The British were so idle that it seemed that the Germans were not attacking hard enough on the battlefield to have the leisure to send warships for a small island. The mastermind behind this is naturally the British Minister to Uruguay, Raicke.

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