Bai Shujie personally led the team, and after witnessing the results of shooting down three enemy planes, in addition to discovering the tactical problems of aerial combat, the other is his DW12.7 general-purpose machine gun, which is too slow to fire on the fighter.

Although the accuracy is very high, the rate of fire of 80 rounds per minute is a rhythm that will be turned into a fireball by the enemy's own fighters.

So he moved out a new project that he had been thinking about, closed the door and continued to think about it.

The core of this project is to fully combine the advantages and disadvantages of the DW12.7 general-purpose machine gun, the Browning 12.7 aviation machine gun, and the German MK108/30 aircraft gun to update the existing aircraft guns and machine guns.

The weight of the German MK108/30mm gun is 64 kg, and the total weight of the 7.7mm of the 2 little devils is 98 kg. In other words, replacing the two machine guns with an MK103/30mm cannon reduces the aircraft load by 34 kg, just enough to maintain the balance of ammunition weight.

The MK108/30mm gun has a rate of fire of 740 rounds per minute, a muzzle velocity of 860 m / s, a projectile weight of 330 grams, a chain of 175 rounds of 60 kg, and a 350 rounds of shells is 120 kg. In the late stages of World War II, this aircraft gun was called a killer. It can hit planes in the air and light tanks on the ground.

Advantages: If such a shell hits any part, you can disassemble one of the little devil's fighters into parts. 4 shells can completely take out a Type 96 bomber (including the B-17 will also be shot down).

The two 7.7mm machine guns of the little devil were installed on both sides of the nose, and later changed to DW12.7mm general-purpose machine guns, which were still placed on both sides, and if they were replaced with 30mm guns, they could only be hung on the belly;

The BF108/H (BF109) single-seat fighter was originally installed with two 20mm aircraft guns in parallel, but now it also needs to be hung on the belly.

If you want to make changes, you will also need to make an ammunition box in the engine room, at least a chain that can hold 175 shells.

The first difficulty was the trim of the aircraft, and the second difficulty was that the weight of the aircraft was not reduced.

Regarding the weight problem, it is better for the Bf108/H of the Wyvern squadron, anyway, its aircraft has an empty weight of 2630 kg, two single chains of 120 kg, and the extra 60 kg occupies only an increase of 2.2%, and the impact is not very large.

However, the Kawasaki 95 of the Flying Leopard Squadron has an empty weight of 1,300 kilograms, and the additional 60 kilograms accounts for 4.6%, and the trim problem needs to be considered, otherwise the stability of the flight and the safety of take-off and landing may be threatened.

When the problem arises, a large amount of real yàn is needed.

The first step was to change the position of the fuel tank in the belly, then to design the position of the small drop fuel tank for the left and right suspensions, and then to have a squadron of pilots take turns flying the modified aircraft.

The second is to connect these machine guns and aircraft guns in parallel and then install them to see how the performance of the aircraft will be affected.

In the end, it was found that the Kawasaki Type 95 fuselage of the little devil was not strong enough to withstand the recoil of the MK108/30mm cannon firing at high speed.

On the contrary, the Bf108/H is equipped with two MK108/30mm guns, replacing the original 20mm gun position, and the weight gain is limited, but the MK108/30mm gun body is slightly longer, and the others are hardly affected.

In the end, Bai Shujie determined that the first plan for improvement was to use the MK108/30mm aircraft gun from the "cottage" to first reequip the Bf108/H of the Feilong Squadron.

The MK108/30mm cannon needs to be operated by point control, and it is not possible to use manual operation. Therefore, the purpose of the original "cottage" was originally intended to be placed on an armored train or armored car in Chengde to undertake air defense tasks.

But later, when the little devil dealt with Chengde, he didn't send a plane at all, so he had to give up. At that time, two Bf108/H had been assembled and were training in secret, so Bai Shujie never took out this aircraft gun.

Now the armored cars that are modified by themselves use all 20mm guns compensated by the little devils. Of course, most of them stayed in Chengde and were not brought to Korea, because the Eighth Route Army needed that kind of thing more.

When the Feilong squadron completed the modification, Bai Shujie began to build two other aircraft guns for the Kawasaki Type 95 "Shanzhai". Because there are too few of their own aircraft, they must have enough advantage in firepower. Anyway, it can't be the same as the 20mm of the little devil, and it must be able to suppress the firepower of the little devil.

These two aircraft guns are the 23mm and 25mm aircraft guns used successively in the Jian-5 fighter series.

Finally, after more than a month of arduous test flights, the Kawasaki Type 95 was modified with two parallel 25mm guns, which also used electric control, and the power exceeded 20mm.

After all, it is the technology of the next ten years, and the performance is not the same. The key is that the bomb supply method, cooling system, and control and withdrawal method have surpassed the current level.

Bai Shujie is used to driving cars, so he is ingenious, and the gun switches of the two planes are adjusted to the right foot. The purpose of this is to facilitate the pilot's ability to be ready to fly with both hands at any time, and will not be affected by the shaking of the fuselage when rolling.

The modification of the aircraft gun is basically on the right track, that is the matter of ground crews and technicians, and it is impossible for Bai Shujie to fall into it. He had now reached the Black Ridge Cave, which was the place where there was an entrance and sixteen branch caves inside.

This is the most top-secret place of the Flying Dragon Expeditionary Force - the penicillin breeding and breeding base, and the signboard hanging at the entrance reads "Pyongyang Animal Quarantine Station".

Because of the prevention of contagion, outsiders are not allowed to enter, so there are two guard boxes outside the gate. The sentry box outside was a light machine gun, the sentry box inside was a heavy machine gun, and the four soldiers on duty were holding assault rifles.

"How's it going?"

Bai Shujie did not go directly to the innermost, but walked more than thirty meters after entering the main cave, just like a branch cave on the right drilled into, it turned out that this was the quality appraisal office after the final extraction. The person in charge of the "Feilong Antibiotic" project, Wan Haotian works here.

"Senior brother, the output still can't be raised! I dug two more 24-meter-long branch caves here and added 4,800 strains to cultivate. However, the daily production has increased by less than 12%, and only about 590 sticks of penicillin can be extracted from 10,000 units, and the highest daily output is less than 700. ”

Wan Haotian said with a wry smile: "In the past month or so, 72 have been consumed in the hospital, and now the inventory is only about 20,000. I heard that you are going to do business abroad, but I'm afraid that this output will not work, right? Tens of thousands of miles of freight can't be earned. ”

"It's just the beginning, take your time! As long as you can increase to 100,000 pieces per month after half a year, you will be rich! How would you feel if I sued you for 5,000 units of 1 vial of penicillin and I was ready to price 5,000 units of 3 vials per ounce of gold? ”

Bai Shujie smiled and said, "You have 20,000 pieces of 10,000 units now, right, that's 40,000 pieces of 5,000 units." The equivalent of gold is 13,333.33 ounces, which is 378 kilograms of gold and more than 400,000 US dollars. ”

On January 7, 1938, Bai Shujie's long-awaited second batch of supplies finally arrived. This is the Mk/IV twin Bofors M36 shipborne anti-aircraft gun produced in the Netherlands, with its own fire control radar SCR-584 gun sighting system, and the Bofors company developed a simple mechanical computer for fast tracking of air targets to form a complete system.

In the same batch, there were 600,000 rounds of artillery shells and 1,200 barrels of various types.

What surprised Bai Shujie the most was that there were 12 quadruple M36 shipborne anti-aircraft guns as samples, and 2 vehicle-borne self-propelled anti-aircraft guns, that is, Mk/I 40mm "Morris" self-propelled anti-aircraft guns. The total combat weight is 8 tons, which is actually a medium tank.

40mm "Morris" self-propelled anti-aircraft gun with a speed of 75 km / h on flat roads and 55 / h off-road. The crew consists of 1 driver, 1 commander and 2 gunners and can carry 120 rounds of ammunition. It takes only a minute to go from a state of march to a state of launch, which is something that all countries do not reach now.

Bai Shujie thought that Bofors would not export such "high-tech products", but he didn't expect others to take the initiative to send it to the door.

A little European man who looked to be close to fifty years old translated through a young Asian girl in her twenties: "Mr. Commander-in-Chief, I am the marketing manager of Bofors, but I am German. Please call me Horst. Mr. Payne specifically mentioned to us that you are a generous general, and it is a privilege to know you. ”

Bai Shujie hugged the other party with a smile on his face, and then said, "Mr. Horst, thank you for your trust in me!" Let the workers unload here, please come to my office and talk. ”

After being introduced by the other party, Bai Shujie knew that this Horst was not small.

It turned out that Payne of the Texas Oil Company knew this Horst in his early years. Because of Germany's defeat in the First World War, the major arms companies were greatly affected during the period of punishment.

Because of the shortage of funds, research and development projects are strictly controlled, and the level of scientific research can only stay on the drawings. In order not to interrupt their scientific research, Germany "kicked out" many of its experts to others as helpers, and Horst was such a person.

Payne's appearance is secretly matchmaking, and the powers of various countries actually want to restrain others, and they are all secretly playing tricks.

In particular, Britain and France, the old capitalist countries, were the most despicable, creating a Maginot Line in order to block the westward advance of the German mustache and achieve the strategic goal of "diverting the water from the east." Let Germany and the Soviet Union lose both, and then join forces to clean up the mess.

Unexpectedly, the German mustache was even more cunning, and his diplomatic offensive flickered from east to west, making the east and west of Europe inexplicable, and basically losing the minimum vigilance.

During this period, the Soviet Union, France, Britain, Hungary, and the Netherlands all privately conducted technical exchanges with Germany, which is also the fundamental reason why Germany was able to develop quickly, and the so-called international treaties were all coaxed to others.

However, Germany's biggest problem was that its resources were controlled by the foreign powers, and Payne helped a lot in this regard, so he became a good friend of Khorst.

In line with the principle of equal interests, when the "Feilong antibiotic" was applied for a patent in Germany, Payne took Wang Xinlan to visit this old man in Horst.

"Mr. Commander-in-Chief, Miss Wang has preliminarily agreed to have me as a European agent." Horst did not have reservations: "We do not have cash payments, but some arms can be offered in exchange." I wonder what Mr. Commander-in-Chief thinks about our construction? ”

The "Wyvern antibiotic" was going to be sold anyway, and the Deutsche Mark quickly ran out of use, and it would have been best to exchange it in kind. But Bai Shujie was not mentally prepared at all, so he couldn't think of what it would be better to exchange it for.

However, Germany and the little devil are now allies, and it will be more troublesome for this Horst to sell the medicine to the little devil in the future.

"Mr. Horst, to be honest, I haven't received a report from Miss Wang Xinlan yet." Bai Shujie was careful with his words: "There is an agreement between us and Mr. Payne, and for the sake of fairness, this agreement should also be binding on you. That is, 'Flying Dragon Antibiotics' cannot be sold to Japan, a hostile country of our country. ”

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