Bai Yi's plan is very simple, using copper as the key cover of anti-tank ammunition, after all, this low-speed anti-tank ammunition basically uses the principle of armor-piercing bullets, and the so-called armor-piercing bullets are the types of ammunition that use high-temperature metal jets as armor penetration protection to achieve damage to armored targets. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

As early as 1936 during the Spanish Civil War, Germany was the first to put armor-piercing shells into actual combat, with the outbreak of World War II, armor-piercing shells have been developed rapidly, until more than ten years after the war, this ammunition is still the main nemesis of tank armored vehicles.

It was not until the advent of composite armor that the status of armor-piercing shells gradually fell silent, but in the early 50s, countries around the world still widely used homogeneous armor made of high-strength alloy steel, and armor-piercing shells still have great lethality for armored targets.

However, if you want to improve the combat effectiveness of this kind of ammunition, the built-in conical medicine cover is fundamental, especially in the selection of materials, you must use dense metal materials, in order to better meet the requirements, the density of copper is denser in many metals, and it is easier to flow when forming a heat flow, which can form a uniform metal jet, thereby improving the lethality of ammunition.

As for the propellant at the back end, Bai Yi's opinion is to use white sugar and potassium nitrate, mixed in a ratio of 4:6. This mixture, which was often used by aviation enthusiasts as a propellant for sounding rockets in previous lives, has enough thrust and is very simple to use both materials.

Southern China is the main sugar producing area, especially the cane sugar in the Liangguang area, which is of good quality; As for potassium nitrate, it sounds like a very unfamiliar name, but it is actually extracted from saltpeter from all over the world, and the process is very simple, and the preparation and production can be achieved in the vast rural areas, so it is not difficult to obtain.

With Bai Yi's suggestion, the trial production of anti-tank ammunition was gradually on the right track, and soon the first batch of sample bombs was manufactured, and the results of the target test were not bad, at a distance of 100 meters, it could penetrate 100mm thick homogeneous armor, but when Bai Yi saw this result, a pair of brows were deeply furrowed.

You must know that the initial design goal of this No. 2 recoilless gun, which was born from the RPG-7 in the previous life, was to penetrate more than 200mm of armored targets at a distance of 300 meters, but now it can barely penetrate 100mm thick homogeneous armor at a distance of 100 meters, and this data is not even one-third of the original design index.

What's more, with the domestic technical level, the quality of the homogeneous armor provided is unlikely to be much better, at least compared with the homogeneous armor of the superpowers such as the United States and the Soviet Union, which is several levels worse, if this factor is added, the combat effectiveness of the new anti-tank ammunition developed is even inferior to the "Iron Fist" anti-tank rocket launcher of Germany during World War II.

Not to mention dealing with the new tanks with more and more advanced performance, even if they are a little powerless to deal with the old tanks of the World War II period, Wu Yunzhe's letter also mentioned this, so I hope Bai Yi can think of a way after work, otherwise in this way, the No. 2 recoilless gun is very likely to be dismounted, after all, in the case of a shortage of national resources, terminating the continued research and development of a weapon and equipment that was born backward is also a saving of resources!

"Is it structure? Or is there something wrong with the charge inside? ”

After reading the letter, Bai Yi threw the letter in his hand into the fireplace, with the flames strung on the letter, Bai Yi couldn't help but think deeply, and immediately picked up the letter paper on the side, and drew a few simple drawings of the No. 2 recoilless gun on it, facing the picture, Bai Yi slowly shook his head: "The structure should be fine, it can only be ......"

Just as Bai Yi was talking to himself, the door was knocked open from the outside, and a tall figure ran in panting, but Bai Yi was startled, but before he could react, he saw that person rushing over, staring directly at Bai Yi, and asked in pure German: "Say!" Who are you? ”

Seriously, if Bai Yi hadn't seen that the person who came was Stuttenberg for the first time, maybe he would have given the result to the person who rushed over with one shot, because at the moment when Stottenberg pounced, Bai Yi had already held his right hand on the pistol at his waist.

Stottenberg didn't know that he had just walked around outside the ghost gate, looked at Bai Yi with a surprised face, and thought that the other party didn't understand his words, so he turned to Chinese and asked again: "Tell me, who are you?" ”

It's okay if Stuttenberg doesn't say this, but Bai Yi is really blind, he just focused all his energy on self-defense, and didn't hear Stuttenberg's words clearly, but now he can't help but be a little surprised when he understands it, and he said, this guy went to pick up firewood, why is it like he lost his mind, could it be that he ate some poisonous mushrooms?

Seeing that Bai Yi didn't speak, he thought that the other party wanted to continue to be perfunctory, so he laughed angrily: "If you don't speak, you think I don't know?" There were only a few experts involved in automatic grenade launchers back then, and there were indeed one or two students from China, including those I introduced, although I was imprisoned by the Soviets for so many years, but some things can never be erased, let's say, are you a student of Dr. Oleg, or an assistant to Professor Stinger? ”

"Automatic grenade launchers? Student? Aides? Bai Yi finally realized that there was something wrong with Stuttenberg's words, but before he could speak, Stuttenberg's words smashed his head and face: "Please stop quibbling, I admit that your praise is in place, but the name of the father of the grenade launcher has been completely betrayed, at least in my case, in other words, you are the same as me, so, Bai Yi, you are very dangerous here, you must leave!" ”

"But I ......"

Bai Yi hurriedly wanted to explain, but before he could speak, Stuttenberg inadvertently saw the notebook left by Bai Yi on the table, through the slight fire in the fireplace, Stuttenberg's blue eyes lit up suddenly, and he shouted in a lost voice: "Super 'Iron Fist'?" ”

After speaking, when he looked at Bai Yi, there was a little more determination in his eyes: "I know who you are, if you want to achieve your goal, just listen to me, you can't stay here anymore, otherwise you ......"

Sturtberg wanted to say "otherwise dangerous", but only said the word "otherwise", when the word "dangerous" was still brewing in his throat, he heard a messy footsteps outside the house, and then more than a dozen Soviet soldiers armed to the teeth came in, and the muzzle of the black hole pointed directly at Bai Yi and Stuttenberg, and one of the leaders shouted in a deep voice: "The Ministry of Internal Affairs of the Soviet Union, ordered to search!" ”

Hearing this, Bai Yi's heart not only chuckled......