Chapter 469 Legendary Model!

Professor Liu readily accepted Gao Zhendong's blatant "extortion", as it was a rare opportunity.

Gao Zhendong's initiative made Professor Liu very interested. In his opinion, Gao Zhendong had basically never worked on this kind of specific mechanical structure. Here, Gao Zhendong mostly provided guidance in the general direction.

So he immediately agreed to Gao Zhendong's proposal, as he really wanted to see the strength of Chief Engineer Gao.

Moreover, the issue of the drum magazine did not affect the overall progress of the project. He had to thank Gao Zhendong for not requiring compatibility with both magazines and belts like the M249. That thing was really a typical example of wanting both. As for the final effect, haha...

However, he did not expect that Gao Zhendong did not ask him for anything. He just asked for the structural design drawing of the magazine port of a new gun and left. He did not even ask for a training bullet. He did not know how Gao Zhendong verified the design process.

The Third Rolling Mill Militia: Guess what I have?

He knew that Gao Zhendong could definitely do it, but whether it was good or not was another matter. However, he never expected that Gao Zhendong would be so quick and bring the results in less than a month.

At first glance, it seems to be no different from the RPD's belt box, but when Professor Liu saw the exposed spring handle, he realized that this thing is not simple, at least compared to the one on the PPsh41.

This external clockwork handle made Professor Liu immediately understand Gao Zhendong's intention. This thing can load the bullet first, but not wind the spring. In this case, the spring is not under stress, which can effectively prevent problems such as permanent deformation caused by long-term stress on the spring.

When you need it, just wind it up a few times in advance. This little bit of time can always be squeezed out when preparing for battle.

This method effectively solves the contradiction between pre-loading and reliable ammunition supply.

Gao Zhendong actually didn't do anything special. He just copied the 81 drum magazine from his previous life. As for machining, the factory also had the technology.

The standard answer is there, so why bother?

Professor Liu opened the magazine drum. At first glance, the structure inside was separated into grids by a magazine plate or magazine fork made of two layers of steel plates. It was different from the PPsh, which had only one slide and no other fixed parts.

After taking a look at it, it seemed ordinary. Professor Liu knew that nothing could be confirmed about this kind of thing without real guns and real bullets.

He turned around and called his students to load the bullets and try playing a few drums.

Professor Liu's student took the drum magazine and felt the difference from the PPsh41 as soon as he loaded the bullet. This drum magazine was loaded with the bullet head facing downwards, or in other words, the side that could be disassembled was facing the bottom of the bullet.

After placing several bullets with their heads facing downwards into a grid, the student shook it vigorously and was pleasantly surprised to find that the bullets were well fixed.

He continued to load the bullets, and now everyone noticed a difference between this structure and the PPsh drum magazine. In the former, the base of the bullet had to be aligned with the bottom slide groove before it could be loaded, which actually made loading a bit slow.

But Gao Zhendong's is different. For each frame, you just need to throw the bullet into it with the nose facing downwards. You don't need to pay special attention to the position and alignment. At most, you just need to tidy up each frame when loading the last bullet.

One word, quick!
What is a quick-loading drum? This is a quick-loading drum!

Soon, the students loaded all the bullets, and the speed was much faster. After the bullets were almost loaded, the students even shook the drum magazine twice without any instruction, and the bullets suddenly appeared very regular.

After a few pushes to get the bullets into the magazine port and then adding the last few rounds, everyone realized that this drum magazine was different from the second one they imitated. The part where the magazine port was inserted into the magazine port had the same external dimensions as the magazine, but there were some small steel sheet structures inside, which meant that the bullets were still loaded in a single row and single entry manner.

When Professor Liu saw it, he cried out.

"Ah, so this problem is solved? And you use the width of the magazine opening to make the angle at which the chute enters the magazine opening smoother? We are so stupid that we kept thinking about how to solve the reliability problem of the double-row, double-feed. I didn't expect you to just give up those few rounds and change to a single-row, single-feed to solve the problem. Mr. Gao, this is really a great trick."

Gao Zhendong didn't say much, just smiled and said, "We'll talk after we beat you, we'll talk after we beat you, haha."

Several people from Beijing University of Technology looked at each other and said, "Well, what Mr. Gao said makes sense."

He wound up the drum magazine, inserted it into the sample gun, lay down, and then Professor Liu gave the order.

"shooting!"

"Da da da da da..." The shooter held on to Huo'er and first splashed water on him to see the effect of continuous firing.

75 rounds of bullets couldn't be fired for long in this fully automatic mode, and soon the gunfire stopped.

The students quickly gathered around and took down the drum.

There was no jam, but it was impossible to count how many shots were fired. The comrades at the scene were not gods, so they had to disassemble the magazine to see if there were any remaining bullets.

If there are extra bullets, it means they are inch bullets. That is, although some bullets are not stuck, they do not enter the barrel and fire in the expected way, but instead circle around in the drum and do not come out.

When the back cover of the drum magazine was opened, everyone took a close look. No need to look too closely, just look at the color. It was all black, without the yellow at the bottom of the magazine. Everyone breathed a sigh of relief, because it was all gone!
Comrades from Beijing University of Technology continued without further ado!
They installed the drum magazine many times, and tried all the shooting modes, such as continuous fire, short burst fire, long burst fire, single shot, etc., without any malfunction, and it was as smooth as if it was greased.

Professor Liu happily extended his hand to Gao Zhendong: "Mr. Gao, I'll pay you and deliver the goods. If you give me the drawings, I'll treat you to a meal. Hahaha."

Don’t worry about whether this thing has any defects or not. At least it is much better than the one designed by my team. The original one almost mistook the machine gun for a rifle.

John Bull L85: Hand-pulled machine guns, I'm familiar with them.

And so far, Professor Liu really hasn't thought of any flaws. This is a great gift, I'll take it.

Invite someone to a dinner. Invite someone to a dinner. This kind of dinner makes people happy.

Gao Zhendong took out a stack of papers from his bag and handed it to Professor Liu.

Professor Liu took it and looked at it carefully for a long time before he sighed, "You just turned it over. The bullet tip is installed in the guide groove. This reverse direction solves many structural problems. For example, if the bullet base is guided, sufficient space needs to be left for making the guide groove baffle, but the bullet tip does not need it. There is already a lot of space between the bullet tips. It also solves the problem of loose bullet body caused by the taper problem. It's interesting."

Gao Zhendong smiled and said, "These are just some of my little tricks, not worth mentioning, not worth mentioning."

Professor Liu looked at him with an unhappy expression: "Are you being modest or scolding me?"

Gao Zhendong was speechless: "Let's go, let's eat, let's eat."

A group of people laughed. Professor Liu treated Gao Zhendong to this meal willingly and he ate without any burden.
-
The next morning, with Lou Xiao'e's farewell, Gao Zhendong got on the factory car on the side of the road not far from the courtyard and headed towards the airport to see the optical system at the Northeast Institute of Optics.

Time is limited, and it would be a waste to drive there. Moreover, the journey is long and there is a possibility of accidents. It is different to take a plane, you can fly directly.

With him, there was a comrade from the Internal Security Section 5 of the Third Rolling Mill and a comrade from the Mechanical Engineering Department of the Third Mill. This optical system would eventually be installed on the machines of the Third Mill, and this comrade was in charge of this matter.

This time he went there with Gao Zhendong first to familiarize himself with the optical system and see if there was anything that needed improvement from a mechanical perspective.

Nowadays, taking a plane has little to do with money. Those who can take a plane do not need to worry about the money. It is just that people with a lot of money find it difficult to take a plane.

For people at that time, being able to take a flight could not be considered as bringing honor to the family, but it would be a great topic of conversation within ten years, and this was not an exaggeration at all.

Standing in front of the plane, the two accompanying comrades looked excited. Looking at Gao Zhendong's calm look, they admired him in their hearts. They thought that Mr. Gao was knowledgeable and calm.

In fact, what Gao Zhendong was thinking was: "I finally get to ride on this thing. I've ridden on airplanes in my previous life, but I never dared to think about this kind of airplane."

In front of him was a small single-propeller aircraft. Its biggest feature was that it had two wings and was a biplane.

This aircraft is the famous flying tractor, a light transport aircraft that was copied from the Russian An-2 and successfully copied in 57 and produced in large quantities.

Although this nickname may sound awkward, it is actually a compliment.

This thing is so useful that it was still in use before Gao Zhendong traveled through time, and its improved version was still in production.

As for why it is called a flying tractor, it is mainly because it flies slowly, makes a lot of noise, and vibrates a lot. Moreover, it has a feature that is very similar to a tractor.

——This thing can be started by hand crank!

Although it can be started electrically, it is thoughtfully equipped with a manual starting device, and the engine can be started manually even when the car is parked in the air.

What Gao Zhendong is seeing now is such a dark green legendary aircraft.

As a military fan, Gao Zhendong had heard of this thing for a long time, and now he finally saw it.

Gao Zhendong walked around the plane several times, as if he wanted to remember it. At this time, the rules of flying were not so strict.

Gao Zhendong walked around a few times and got on the plane happily. He was dumbfounded when he got on the plane. It looked like there were two rows of benches facing each other with seat belts. There were no backrests or cushions at all.

Gao Zhendong wiped a cold sweat in his heart. This trip would probably be uncomfortable for a while, although the route was only about 900 kilometers long, which was not far for an airplane.

But this plane is different. Its cruising speed is only 140~220km/h. Even if it tries its best, it will take four hours to fly.

(End of this chapter)