afterglow

Chapter 284 Three base propellants?Grab tank orders

The classic M43 7.62×39㎜ ammunition that has left a strong mark on human history has many shortcomings just like the German 7.92×33㎜Kurz ammunition because it was born early. After all, it is a pioneering work and lacks experience.

The biggest problem is that the ballistic trajectory is relatively curved and not straight enough, and it is not very smooth whether it is zeroing or actual shooting.

Comparing the straight laser-like trajectory with the curved pee trajectory, it is obvious which is better and worse.

M43弹在100m时，弹道约高于基线21㎝，200m时约高于基线23㎝，290米距离时便与基线重合。

There is an old saying in the research and development of firearms that "to develop a gun, you must first have a bullet, and to develop a bullet, you must first have a propellant." It can be seen that the propellant is of great significance to the entire light weapon system.

The pointed, stern, and lead-core warhead weighs 7.6g. The armor is made of galvanized steel. The projectile body is in the shape of a bottomless bottle, filled with 1.62g of propellant, with a muzzle velocity of about 760m/s and muzzle kinetic energy of about 2195J.

As a comparison, the bullets of the M43 bullet and the Kurz bullet have a mass of 7.9g and 8g respectively. It can be seen that the warhead of this type of intermediate power bullet designed by Guangzhou Arsenal is slightly lighter, and the muzzle velocity is tens of meters per second higher than that.

Because the performance is too dazzling, or far beyond the level that should be in this era, Zhou Changfeng is very puzzled, and even faintly suspicious.

how did you do that?Did the pretty guys at Guangzhou Armory play tricks on purpose?
So he looked around and tried to find the relevant person in charge to ask.

Seeing him like this, the representative of the arsenal on the side immediately leaned over.

"The officer has doubts?"

"What's the matter with your brief introduction? You have selectively ignored a lot of things. What gun is the initial velocity of the [-] fired on?"

"It's the result of the short rifle next to it."

It was a short rifle about one meter in length, with a magazine and a gas tube. It was obviously a semi-automatic rifle.

According to Zhou Changfeng's visual inspection, the length of its barrel is about fifty centimeters, which is not particularly long.

So he then asked, "What kind of propellant is used for this bomb?"

"The No. 20.00 drug C-type manufactured by our factory consists of 60.00% mononitroglycerin, [-]% octanitrocellulose, [-]% nitroguanidine, [-]% petrolatum, and [-]% potassium nitrate." A young man with a rather tall hairline replied fluently.

aha?Triple base propellant?

Zhou Changfeng opened his mouth slightly in surprise after hearing this answer, and pondered: "This...will the ablation be a bit big? The life of the barrel is not ideal."

"To tell you the truth, it's actually not bad. The measured life of the gun that fired this bullet can barely reach [-] rounds. The difficulty is that the processing is not easy and the yield is low."

Smokeless gunpowder is divided into single-base, double-base, and triple-base. The earliest single-base gunpowder is the main body of nitrocellulose. It was the B-type gunpowder invented by the French and used in the world's first Lebel rifle that fired smokeless gunpowder.

The double-base drug contains two main components: nitrocellulose and nitroglycerin. It is characterized by fast dyeing speed and high energy, but high temperature and large ablation will affect the life of the barrel.The Kodai propellant widely used by the British and nicknamed "Queen's Noodles" is a double-base drug, which is in the shape of a spaghetti-like round bar.

The three-base drug is based on the former by adding nitroguanidine, which will generate nitrogen during the combustion process, thereby improving the ablation problem and suppressing the muzzle flame; the disadvantage is that it is more difficult to process and manufacture.

In the reform and establishment of Westernization that year, while introducing a full set of Lebel rifle production lines and manufacturing technology, the technology of B-type smokeless gunpowder ammunition also came together.This single-base propellant with the appearance of a square sheet has good performance. The Xu’s gunpowder obtained by adding a little improvement on its basis is the standard bullet propellant of the Ming army. Over the past few decades, the output and inventory have been surprisingly large, and it is still widely used.

"Is it very low? Can you guarantee a certain output?"

"After the production line is built, it will be improved while building. As long as the resources are sufficient, we are confident that we can produce [-] catties of good products per day."

Zhou Changfeng frowned and said, "This is too low."

A single production line has a daily output of 200000g, which is probably only enough to make 10,000+ rounds of bullets, which is pitifully small.

"Sir, I don't know, this mixed medicine is really complicated." The young man sighed: "My master has been thinking about it for more than ten years since he was young, and it is really not easy to change the C-word medicine from No. [-] to No. [-]."

"I understand your efforts, but this technology is indeed immature and cannot take on great responsibilities." Zhou Changfeng was also helpless. He thought for a while and asked, "If ordinary propellants are used instead, how much will the performance of this type of bullet decrease?"

"Because the flakes take up more volume, the shell can only hold 710 grams. When fired with the same gun, the muzzle velocity will drop to [-] meters per second, and the kinetic energy will be more than [-] joules."

Oh, this data is on the same level as the M43 and Kurz bombs.

The previous data were so good-looking, purely because of the use of advanced but immature experimental propellants.

Zhou Changfeng walked around the scene again, examining the works of other government-run and private enterprises one by one. The level varies, some are slanted, some are mediocre, and some are horrible and purely funny...

It seems that only the works of Guangzhou Arsenal are better.

But having said that, after all, it is only 38 years since Zhichang. It seems to be a very good achievement to reach the level similar to the classic M43 bomb five years in advance?For a while, Zhou Changfeng felt that he was a little too ambitious.

It has to be said that the size of China is really too large, and correspondingly, the resources are also abundant enough, which also includes human resources.

Even if the degree of industrialization is not high and the educational resources are limited, the size of the population benefiting from it is still frighteningly high. This makes the current Ming Dynasty seem to be underdeveloped, but it has enough spare energy to invest in various industries.

In the same period of history, Japan relied heavily on technology transfer from Western countries. Most of the technologies had to be introduced after the Western powers had matured their applications, but they did not have the resources to independently develop them.

At that time, the aircraft companies in Western countries disliked the Japanese very much, because these poor people would only buy one or two aircraft at a time and go back to imitate them, and they were reluctant to place large orders.

In contrast, Daming, a late-developing industrial country, has smoothed out the gaps in most things after decades of catching up in various industries. There is no way to solve the gaps in a few cutting-edge technologies.

This is the macroscopic manifestation of the size advantage.

Then, as the participants arrived, the "first test" soon began.

Each manufacturer came to the stage one after another to tell about their own works, followed by questions and answers and ratings.

Zhou Changfeng was generally interested in this. The military officers and officials present were all experts in this field, and their careful review and analysis were not bad. At least someone in Zhou thought it was generally in line with reality.

The army is more interested in the semi-automatic short rifle developed by Guangzhou Arsenal; while the air force is interested in the fully automatic short rifle, that is, the "assault rifle". Several paratrooper officers are entangled in the two types of assault rifles.

The Ming Army actually came to join in the fun, after all, this bidding was led by the Air Force.

The remarks made by the representatives of the army were exactly the same as those of the later generations of the army. They stubbornly insisted on several points and threatened that even if they had to choose, they would only choose semi-automatic rifles.

One, fully automatic is more ammunition-consuming than semi-automatic.

Second, the length of the barrel of a fully automatic short rifle is one-fifth shorter than that of a semi-automatic rifle, and the accuracy at medium distances is bound to be unsatisfactory.

Third, soldiers are accustomed to the style of semi-automatic short rifles, while fully automatic ones have a pistol grip, which may not be easy to handle.

Fourth, fully automatic short rifles are more expensive.

ah!army!

But in fact this is not a problem at all.

As long as the training is qualified and there is supervision by non-commissioned officers and officers in actual combat, the soldiers actually have little chance to shoot indiscriminately.

For example, according to the ordinance, the use of fully automatic mode is prohibited at medium distances. When the distance is several hundred meters, the non-commissioned officers and officers have complete leisure to stop those soldiers who forget their shapes.If the distance is close, it doesn't matter if you shoot randomly, it's right to suppress the firepower.

As for the accuracy, if you compare the AK47 and SKS, the latter has only a slight advantage, even indistinguishable—the same spread over a distance of 100m, the spread of the 56 is 10-11.6cm, and the spread of the 56 is 11.5-13.6cm.

Whether the soldiers are comfortable or not is even more nonsense. Is there any saying that they can't adapt?

The price is a bit counterintuitive, and there is no significant difference. The semi-automatic short rifle is often more expensive-because it needs to consume more wood.

依75年采购价，56冲为128元，而简化工艺后的56半仍旧要135元。

Standing on the shoulders of predecessors, the best choice that can be concluded is to reach the destination in one step.

Iterate directly from the full-power bolt-action rifle to the intermediate-power automatic rifle, and then wait for a few decades until the small-caliber bullet matures, then it can be iterated again.This is the standard answer, and the other choices in the middle are not perfect.

Zhou Changfeng knew that it was impossible to change the most conservative concept of the army by himself. The navy and air force were fine. Anyway, the navy was his own, and the air force was right because of its special needs.

So he figured out how to get the old diehards in the Army to change their minds, or use crooked ways to prevent them from purchasing semi-automatic short rifles.

Refer to the Germans secretly dubbing Stg44 as the submachine gun MP44, so as to fool the army?
This seems unlikely, because it can only replace the position of the submachine gun. The Army will continue to purchase semi-automatic short rifles, and the purpose is to directly replace the position of the rifle.

"It's hard."

Zhou Changfeng left the No. [-] meeting room of the Military Weapons Bureau while making complaints. If the army's intentions cannot be changed, it is equivalent to watching them use precious resources and production capacity on things that are inefficient and cost-effective.

This taste is uncomfortable and awkward.

It's like buying a complete computer with accessories and assembling it yourself is the most cost-effective, but the family doesn't listen to persuasion and goes to the computer city to buy a complete computer with i3, GT610, and other brand power supplies.

But no matter what, at least do your job well first.

Before leaving the Military Weapons Bureau, Zhou Changfeng still wandered around here upstairs and downstairs. It just so happened that the meeting in No. [-] Conference Hall ended, and a group of military officers and officials came out chatting and whispering.

Hearing that they were discussing tanks, Zhou Changfeng, who was quite curious, asked straight to the point.

Come!Let me be healthy!

Given that the level of secrecy allowed, the officers handed him the documents without any concealment, and then took out their lighters and smoked.

After four revisions and adjustments, the trial-produced Type [-] medium tank, which was tested last year, was finally approved, and it was finalized as the "Type [-] Medium Tank", also known as the Battle Tank.

It sounds a bit of a second class, but as the name suggests, this is a tank used to break through enemy positions, and it is the main assault weapon of the balance.

The Type 5.8 tank was designed by Yanjing National No. 2.42 Heavy Machinery Company. It is 2.55 meters long, 2.4 meters wide, and [-] meters high, with an aspect ratio of [-]. It is long because of the in-line engine.

车体正面装甲厚24㎜、车体侧面24㎜、炮塔正面厚28㎜、炮塔侧面24㎜、炮盾为40㎜、车长指挥塔四周均为20㎜。

There are two types of armor steel. Only the gun mantlet uses the newly developed rolled nickel-chromium-molybdenum alloy steel with a Brinell hardness of 260HBW. It has moderate performance and is suitable for resisting larger projectiles. The rest of the armor is made of surface-hardened armor steel with a Brinell hardness of 520HBW. It is very suitable for defending against small projectiles, but it may break when facing large projectiles.

The empty car weighs 17.3 tons. It is equipped with an in-line ten-cylinder air-cooled diesel engine with a working speed of 2000 revolutions per minute. At this time, it can output 210 horsepower, and the driving wheel is behind.Six forward gears and two reverse gears, the maximum road speed is 40㎞/h, and the maximum reverse speed is 8㎞/h.

The suspension mechanism is a mature balanced suspension, with one set of two road wheels and three sets on each side.The steering mechanism is a common differential type.The shift mechanism can also be equipped with pneumatic auxiliary equipment, which saves effort when operating, but the maintenance and repair work is much more troublesome.

The main weapon is a 34mm tank gun with 48 times the caliber. This is the product of Shenyang Army Artillery Factory. It fires 48×176mm ammunition.

In addition, there are a heading machine gun, a side-by-side machine gun, and a roof machine gun.

The crew of the whole vehicle is five people, the driver, the heading machine gunner, the commander, the gunner, and the loader.

However, the Army seems to be hesitant to equip every tank with a vehicle-mounted radio as a standard, because its price is not cheap. At present, it is only considering installing radio equipment for each platoon leader, and the platoon leader uses sign language, semaphore, and shouting to command other tanks.

"Tsk, this car looks good, what is the diameter of the turret seat ring?" Zhou Changfeng asked while turning the page.

A civilian lieutenant colonel wearing glasses swallowed a cloud, and replied casually: "It's less than five feet, more than 530 millimeters."

The diameter of the turret seat ring determines the upgrade potential of this type of tank to a large extent. If you want to replace it with a more powerful tank gun in the future, the turret will naturally be larger.

If the turret seat ring is not large enough, it will be difficult to adapt to the new turret, and the production line of the car body will have to be adjusted.

The Germans changed the 25 tons of the earliest A-type of the No. IV tank, and the most powerful H-type was as high as [-] tons. Unfortunately, due to the limitation of the turret seat ring and chassis suspension, it could not be further upgraded in the end.

"How many cars do you plan to purchase?"

"The first order is 420 vehicles, and there may be more."

Still want to add?
hateful!The factory's production capacity is limited, how can the army occupy all the good things?
Zhou Changfeng immediately ran off with oil on the soles of his feet, intending to quickly get the navy to rush to place an order--such a good thing, the marines want it too!
　Hey, because I have to have a gastroenteroscopy tomorrow, I have been drinking that disgusting electrolyte water at night, it is really uncomfortable,

　　
　
(End of this chapter)